Dual-band frequency meter BM8010. Measurements Ultra-low resistance measurement

The date: 31.07.2021

Measurements

Aleksakov G., Gavrilin V.

1981, No. 5, p. 68.

Low frequency function generator

Aleksakov G., Gavrilin V.

1981, no. 6, p. 68.

Amplitude 0 ... 10 V; frequency 0.1 ... 1100 Hz; the waveform is triangular, rectangular, sinusoidal.

Simple LC meter

Stepanov A.

1982, no. 3, p. 47.

Wide-range pulse generator

Ivanov B.

1982, No. 6, p. 56.

Direct and inverse signals of ECL and TTL levels

Millivoltmeter-Q-meter

Prokofiev I.

1982, no. 7, p. 31.

Sound generator

Ovechkin M.

1982, no. 8, p. 47.

Bulycheva N., Kondratyev Yu.

1983, no. 1, p. 37.

Schematic diagram.

Universal service oscilloscope C1-94

Bulycheva N., Kondratyev Yu.

1983, no. 2, p. 29.

Design. Details. Establishment.

Generator without inductor

1983, no. 4, p. 48.

Digital multimeter

Anufriev L.

1983, no. 5, p. 45.

Digital multimeter

1983, no. 6, p. 40.

Volt-ohm meter on an op-amp

1983, no. 12, p. thirty.

Again about C1-94

Bogdan A.

1984, no. 5, p. 41.

Semi-automatic test probe

Smirnov A.

1984, no. 6, p. 17.

Simple GKCH

Egorov I.

1984, no. 7, p. 31.

Generator of rectangular pulses

Teslenko L.

1984, no. 7, p. 28.

High frequency millivoltmeter

Stepanov B.

1984, no. 8, p. 57.

Digital capacitance meter

Pevnitsky S.

1984, no. 10, p. 46.

Digital multimeter

Anufriev L.

1984, no. 10, p. 62.

K R 1983 No. 5, 6. Replacement of transistor assemblies.

Improvement of the radio designer "Quartz Calibrator"

Nechaev I.

1985, no. 3, p. 48.

Operational amplifier voltmeter

Shchelkanov V.

1985, no. 4, p. 47.

Millivoltmeter

Mikirtichan G.

1985, no. 5, p. 38.

LF measuring complex. Microvoltmeter

Borovik I.

1985, no. 6, p. 47.

LF measuring complex. Semiconductor Tester

1985, no. 7, p. 43.

LF measuring complex. Phase meter-frequency meter

Borovik I.

1985, no. 8, p. 47.

LF measuring complex. Functional generator.

Borovik I.

1985, no. 9, p. 42.

Linear AC Voltmeter

Ovsienko V.

1985, no. 11, p. 43.

Sound frequency generator

Ovechkin M.

1986, no. 2, p. 43.

Pulse Array Oscilloscope

Sergeev V.

1986, no. 3, p. 42.

LSI multimeter

Anufriev L.

1986, no. 4, p. 34.

Spectrum analyzer

Skrypnik V.

1986, no. 7, p. 41.

Digital or analog?

Mezhlumyan A.

1986, no. 7, p. 25.

Spectrum analyzer

Skrypnik V.

1986, no. 8, p. thirty.

RC oscillator with digital control and counting

Kornev P.

1986, no. 9, p. 46.

Low frequency digital frequency meter

Zasukhin S.

1986, no. 9, p. 49.

Universal probes

Chanturia A.

1986, no. 12, p. 38.

Wide Range Function Generator

Ishutinov I.

1987, no. 1, p. 56.

Millivoltnanoammeter

Akilov B.

1987, no. 2, p. 41.

Digital avometer

Efremov V., Larkin N.

1987, no. 4, p. 45.

Digital scale of the ZCh generator

Vlasenko V.

1987, no. 5, p. 44.

Digital avometer

Efremov V., Larkin N.

1987, no. 5, p. 46.

Functional generator on one op-amp

Nechaev I.

1987, no. 6, p. 48.

Low harmonic signal generator

Shiyanov N.

1987, no. 7, p. 52.

Frequency meter-capacitance meter-generator

Tatarko B.

1987, no. 8, p. 43.

Automatic selection of the measuring range

Potapenko O.

1987, no. 9, p. 40.

Wide-range voltage-frequency converter

1987, no. 10, p. 31.

Op-amp phase meter

1987, no. 12, p. fifty.

Control and measuring equipment

Mikhailov A.

1987, no. 12, p. 52.

From the 33rd All-Union Exhibition of Radio Amateurs-Designers.

Wide range signal generator

Khudoshin A.

1988, no. 4, p. 46.

Reference frequency receiver

Polyakov V.

1988, no. 5, p. 38.

How to check the accuracy of digital instruments.

Oscilloscope sweep generator

Greshnov V.

1988, no. 6, p. 29.

Low frequency frequency response meter

Permyakov S.

1988, no. 7, p. 56.

Simple rms

Grigoriev B.

1988, no. 8, p. 56.

Voltmeter.

Miniature Oscilloscope Probe

Sinelnikov I., Ravich V.

1988, no. 11, p. 23.

Active oscilloscope probe

Grishin A.

1988, no. 12, p. 45.

Tester for low power transistors

Setalov V.

1989, no. 1, p. 42.

Signal generator AF

1989, no. 5, p. 67.

Oxide Capacitor Tester

Bolgov A.

1989, no. 6, p. 44.

Filter for measuring noise

B. Orozov, A.

1989, no. 9, p. 75.

Digital volt-ohm meter with automatic range selection

1989, no. 10, p. 69.

Generator on a digital microcircuit

Nechaev I.

1989, no. 11, p. 61.

LC meter

Dorundyak N.

1989, no. 11, p. 62.

Electronic phase meter

1990, no. 5, p. 56.

Harmonic Distribution Attachments

Dorofeev M.

1990, no. 6, p. 62.

Digital noise generators

Marder M., Fedosov V.

1990, no. 8, p. 68.

Digital multimeter

Biryukov S.

1990, no. 9, p. 55.

Sweeping frequency generator

1990, no. 10, p. 66.

Weighing filter

1990, no. 11, p. 57.

Harmonic distortion selector

Herzen N.

1990, no. 12, p. 67.

GKCH universal

Anufriev L.

1991, no. 2, p. 58.

1991, no. 4, p. 57.

Digital oscilloscope unit

1991, no. 5, p. 54.

Electrical measuring instruments of the magnetoelectric system

Starostin O.

1991, no. 8, p. 65.

Combined electrical measuring instruments

Starostin O.

1991, no. 9, p. fifty.

1991, no. 10, p. 64.

Radio measuring devices. Voltmeters

Starostin O.

1991, no. 11, p. 56.

Small-sized multimeter

Snezhko V.

1991, no. 12, p. 54.

Arrow.

Oscilloscope probe

Semakin N.

1992, no. 1, p. 49.

Measuring generators

Starostin O.

1992, no. 2, p. 48.

Measuring generators

Starostin O.

1992, no. 3, p. 48.

Measuring generators

Starostin O.

1992, no. 4, p. 27.

Measuring generators

Starostin O.

1992, no. 5, p. twenty.

RF probe

Shulgin G.

1992, no. 5, p. 22.

Uncomplicated Function Generator

Ladyka A.

1992, no. 6, p. 44.

High frequency millivoltmeter with linear scale

1992, no. 7, p. 39.

Microwave generator

1992, no. 8, p. 45.

Improved crystal oscillator based on logic MCs

Tagiltsev K.

1992, no. 9, p. 42.

Microwave generator

1992, no. 9, p. 39.

Prescaler for the range of 50-1500 MHz

1992, no. 10, p. 46.

Starostin O.

1992, no. 11, p. 46.

Radio measuring devices. Oscilloscopes

Starostin O.

1992, no. 12, p. 46.

Ignatyuk L.

1993, no. 1, p. 25.

Combined signal generator

Ignatyuk L.

1993, no. 2, p. 33.

Wideband Voltage Controlled Oscillator

Mikhailov V.

1993, no. 4, p. 23.

Switching attachment to the Ts4315 device

Levashov V.

1993, no. 5, p. 40.

For the convenience of measuring capacitance.

Capacitance meter

1993, no. 6, p. 21.

IC Tester

Grechushnikov V.

1993, no. 7, p. 24.

For checking TTL MS IR22, IR23, IR27, KP11, KP14.

Chip RCL Meter

Lavrinenko V.

1993, no. 8, p. twenty.

IF generator for tuning receivers

Nechaev I.

1993, no. 9, p. twenty.

Frequency burst generator

Karlin V.

1993, no. 12, p. 26.

Frequency Response Attachment

Nechaev I.

1994, no. 1, p. 26.

Quartz calibrator

Biryukov S.

1994, no. 2, p. twenty.

Measuring the frequency of signals with a long period

Kostryukov I.

1994, no. 5, p. 22.

AC millivoltmeter

Ignatyuk L.

1994, no. 5, p. 23.

Device for repairing audio equipment

Storchak K.

1994, no. 10, p. 24.

Two simple devices

Dmitriev S.

1994, no. 11, p. 23.

Tester for control of EPROM. Frequency probe.

Wide range square wave generator

1994, no. 12, p. 28.

Prefix-GKCH for the bands 300 ... 900 and 800 ... 1950 MHz

Nechaev I.

1995, no. 1, p. 33.

Multimeter with pointer indicator

Dorofeev M.

1995, no. 3, p. 32.

Semiconductor device parameter meter

Vlasov Yu.

1995, no. 4, p. 34.

Amendment to R 1995 No. 6 from 31.

Probe for testing AM receivers

Vyazov A.

1995, no. 4, p. 33.

LF signal 1 kHz and modulated IF signal 465 kHz

Capacitance and inductance meter

Terentyev E.

1995, no. 4, p. 36.

100 pF - 10 μF, 10 μH - 1 G. Amendment to R 1995 No. 6 from 31.

Capacitance-voltage characteristics of devices on the oscilloscope screen

Nechaev I.

1995, no. 5, p. thirty.

Attachment to a voltmeter for measuring the capacitance of capacitors

Nechaev I.

1995, no. 6, p. 25.

Nechaev I.

1995, no. 8, p. 32.

Microwave millivoltmeter

1995, no. 9, p. 40.

Controlling the tuning of high-frequency resonant circuits with an oscilloscope

1995, no. 9, p. 42.

Microwave generator

1995, no. 10, p. 34.

Oscilloscope attachment for monitoring frequency response

Suchkov O.

1995, no. 11, p. 24.

Digital capacitance meter

Biryukov S.

1995, no. 12, p. 32.

The second profession of a household dosimeter

Nechaev I.

1995, no. 12, p. thirty.

Transistor tester.

Digital oscilloscopes: features and applications

1996, No. 1, p. 33.

The second profession of a household dosimeter

Nechaev I.

1996, No. 1, p. 36.

Capacitor capacitance meter.

Simple tester

1996, no. 2, p. 28.

Small-sized frequency meter

Puzyrkov S.

1996, no. 2, p. 29.

Digital RCL Meter

Biryukov S.

1996, no. 3, p. 38.

Digital multimeter

Biryukov S.

1996, No. 5, p. 32.

Digital multimeter

Biryukov S.

1996, no. 6, p. 32.

Meter switch

Gorodetsky I.

1996, no. 7, p. 31.

Simple digital megohmmeter

Biryukov S.

1996, no. 7, p. 32.

Precision Analog Calibrator

1996, no. 7, p. 34.

Forms stepped voltage levels.

Simple Tester for Logic ICs

1996, no. 8, p. 33.

Small-sized signal generator

Nechaev I.

1996, No. 9, p. 36.

Six-channel electronic switch

1996, no. 9, p. 35.

For an oscilloscope.

Portable frequency counter

Tokarev Ya.

1996, no. 10, p. 31.

Ohmmeter with linear scale

Dolgov O.

1996, no. 10, p. 52.

Voltage converter for digital voltmeter

Romanchuk A.

1996, no. 10, p. 32.

Oscilloscope sweep generator

Dorofeev M.

1996, no. 11, p. 32.

Measurements of the repetition period of complex impulses

Bannikov V.

1996, no. 12, p. 34.

Logic Probe

Semenov B., Semenov P.

1996, no. 12, p. 34.

Advanced TTL logic probe

Polyansky P.

1997, No. 1, p. 32.

Functional generator with a frequency range of 0.1 Hz ... 10 MHz

Nechaev I.

1997, No. 1, p. 34.

Signal generator + GKCH

1997, No. 2, p. 51.

Repair of combined measuring instruments

Feofilov A.

1997, No. 2, p. 32.

Microprocessor controlled digital voltmeters. New opportunities

1997, no. 3, p. thirty.

Measuring capacitance with an ohmmeter

Biryukov S.

1997, No. 4, p. 33.

Microcomputer frequency counter

Kregers J.

1997, No. 4, p. 34.

Up to 350 kHz.

Microcomputer frequency counter

Kregers J.

1997, No. 5, p. 32.

Up to 350 kHz.

GKCH control device

1997, no. 6, p. 28.

Simple wideband RF signal generator

1997, No. 6, p. 48.

Noise generator

Trifonov A.

1997, no. 7, p. 31.

Measuring microcurrents with an oscilloscope

Goncharenko N.

1997, no. 7, p. 32.

High frequency wattmeter

Trifonov A.

1997, no. 8, p. 32.

Counter as a frequency counter probe

Tikhonovsky V.

1997, no. 8, p. 33.

Broadband amplifier

Vlasov M.

1997, no. 10, p. 34.

For oscilloscopes with a low impedance input.

Electronic ohmmeter "in a hurry"

1998, No. 1, p. 29.

Voltmeter with improved linearity

Khvalynsky V.

1998, No. 1, p. 29.

Capacitor tester

Kotlyarov V.

1998, No. 2, p. 41.

Oxide.

Refinement of the logic probe

1998, No. 2, p. 40.

Described in R 1996 No. 12 p. 34.

Capacitor capacitance meter

Vasiliev V.

1998, No. 4, p. 36.

Arrow.

Universal Function Generator

Matykin A.

1998, No. 5, p. 34.

Improvement of the capacitance and inductance meter

Ivanov V.

1998, No. 6, p. 33.

K R 1982 No. 3 p. 47 and P 1995 No. 4 p. 37.

Sweep Voltage Nonlinearity Measurement

Dorofeev M.

1998, No. 7, p. 28.

What is OKS7?

Communication: Kv, Ukv I C-Bi

Efimushkin V., Zharkov M., Ivanov A.

1998, No. 7, p. 72.

Common channel signaling system.

Delayed sweep in an oscilloscope

Dorofeev M.

1998, No. 8, p. 54.

Field strength indicator

Vinogradov Yu.

1998, No. 9, p. 31.

Techniques for measuring sound signals and noise

1998, No. 10, p. 38.

Magnetic field ... what if it affects ...

Polyakov V.

1998, No. 10, p. eight.

A device for measuring an alternating magnetic field.

Digital meter for transistor parameters

Biryukov S.

1998, No. 12, p. 28.

Digital Phosphor Oscilloscopes

Matvienko A.

1999, No. 1, p. 25.

Attachment for measuring temperature with a digital multimeter

Ratnovsky V.

1999, No. 3, p. 31.

Supercapacitor Powered Universal Probe

Nechaev I.

1999, No. 3, p. thirty.

Continuity, p-n junctions, pulse generator LF and HF.

Measuring Harmonic Distortion on a Noise Signal

1999, No. 4, p. 29.

Active OA Probe for Oscilloscope

Nechaev I.

1999, No. 6, p. 28.

Computer checks microcircuits

Skvortsov A.

1999, No. 7, p. 31.

An attachment device to a computer for testing TTL, TTLSh and CMOS microcircuits in DIP14 and DIP16 packages. There is no program.

Nechaev I.

1999, No. 8, p. 42.

Advanced Logic TTL Probe

Kirichenko V.

1999, No. 9, p. 26.

Prescaler improvement

1999, No. 10, p. 29.

To the article Zhuk V. "Pre-frequency divider for the range of 50 ... 1500 MHz" in R 1992 No. 10 p. 46.

Label generator

Biryukov S.

1999, No. 11, p. 32.

Sweeping frequency generator from SK-M-24-2

Herzen N.

1999, No. 12, p. thirty.

Diode-Transistor Logic Probe

2000, no. 1, p. thirty.

Probe for logic signals

2000, no. 2, p. 28.

High frequency wattmeter and noise generator

Fedorov O.

2000, no. 6, p. 32.

Frequency counter on a microcontroller

2000, no. 10, p. five.

Up to 50 MHz, 8-bit.

Two designs for VHF radio station

I. Nechaev (UA3WIA)

2000, No. 11, p. 62.

S-meter for "Lighthouse". Low noise antenna amplifier of 430 MHz range.

AC ammeter with linear scale

Andreev V.

2001, No. 1, p. 25.

Linearization of a thermometer with a metal thermistor

Aleshin P.

2001, No. 1, p. 26.

Digital meter linearization

Biryukov S.

2001, No. 4, p. 32.

Resistance mini store

Fedorov O.

2001, No. 6, p. thirty.

Two voltmeters for K1003PP1

Biryukov S.

2001, No. 8, p. 32.

For the lighting network and for the car. LED scale.

Small-sized multimeter М-830В. Circuitry and repair

Afonskiy A., Kudrevatykh E., Pleshkova T.

2001, No. 9, p. 25.

Power off timers in a digital multimeter

Nechaev I.

2001, No. 9, p. 28.

power switch for М-830В

Potachin I.

2001, No. 9, p. 29.

About repair of multimeters D-830

Mukhutdinov E.

2001, No. 9, p. 29.

Protecting your multimeter ... from light

Sevastyanov V.

2001, No. 9, p. 29.

Active CMOS Probe

Samoilenko A.

2001, No. 11, p. 21.

M890C multimeter error correction when measuring temperature

2001, No. 11, p. 22.

LF harmonic signal generators

2001, No. 12, p. 26.

Oxide capacitor capacitance meter

Dereguz A.

2001, No. 12, p. 27.

Frequency divider for the range 1 ... 5 GHz

2001, No. 12, p. 28.

Attachment to a multimeter for measuring capacitance of capacitors

Biryukov S.

2002, No. 2, p. 29.

Add-on to a frequency meter for testing transistors

Permyakov S.

2002, No. 3, p. 21.

Magnetic shunt current sensor

Aldokhin A.

2002, No. 3, p. 23.

Tone pulse generator in test bench

Kuznetsov E.

2002, No. 5, p. 24.

New functions of the DT-308B multimeter

Kostitsyn S.

2002, No. 6, p. thirty.

Capacitance measurement and "continuity" sound signaling device.

Radio amateur frequency counter

Zorin S., Koroleva N.

2002, No. 6, p. 28.

Battery capacity meter

Stepanov B.

2002, No. 7, p. 38.

Radio amateur frequency counter

Zorin S., Koroleva I.

2002, No. 7, p. 39.

On a microcontroller. 1 Hz ... 50 MHz. And two attachments for measuring capacitance and inductance.

Frequency meter as a fixed frequency generator

Klepalchenko V.

2002, No. 8, p. 31.

Four-level economical probe

Stashkov S.

2002, No. 8, p. thirty.

Resistance.

Digital mini-voltmeter with LCD

Fedorov O.

2002, No. 11, p. 24.

Temperature multimeter attachment

Chudnov V.

2003, No. 1, p. 34.

Voltage divider probe for digital multimeter

2003, No. 1, p. 35.

Device for testing high voltage transistors

2003, No. 3, p. 22.

Simple temperature-voltage converter

Porokhnyavy B.

2003, No. 3, p. 23.

Microfaradometer

Savosin A.

2003, No. 5, p. 22.

Communicator device

Sidorov L.

2003, No. 8, p. 24.

Oxide capacitor probe

Khafizov R.

2003, No. 10, p. 21.

Converter for power supply of a digital multimeter

Belyaev S.

2003, No. 11, p. 21.

In. Ex. 1.8 ... 4 V; Out. Ex. 9 B.

Sound and ultrasonic frequency signal generator

Stepanov B., Frolov V.

2003, No. 12, p. 6.

Microwave laboratory synthesizer

Malygin I., Shturkin N.

2004, no. 1, p. nineteen.

GIR with LED indicator

Gorbatykh V.

2004, no. 2, p. 24.

External sound probe

2004, no. 3, p. 22.

Increasing the input resistance of the voltmeter to 1 GΩ

Korotkov I.

2004, no. 3, p. 24.

Tunable crystal oscillator

Volkov V. (UW3DP), Rubinstein M.

2004, no. 3, p. eight.

LeCroy WaveSurfer Series Digital Oscilloscopes

2004, no. 5, p. 72.

Small-sized double-beam oscilloscope-multimeter

Kichigin A.

2004, no. 6, p. 24.

LeCroy WaveRunner Series Digital Oscilloscopes

2004, no. 6, p. 75.

Spectrum Analyzer GSP-827

2004, no. 7, p. 75.

LC meter

Khlyupin N.

2004, no. 7, p. 26.

0.1 pF ... 5 μF; 0.1 μH ... 5 H.

Modification of the multimeter "MY-67"

2004, no. 7, p. 28.

Increase the volume of the emitter.

Rigol DS5000 Series Digital Oscilloscopes

2004, no. 8, p. 75.

GFG-3015 Special Waveform Generator

2004, no. 9, p. 73.

Extending the measurement range of the M890G multimeter

Zagorulko A.

2004, no. 9, p. 27.

Introduction of low battery indication in DT-838

Shapovalov A.

2004, no. 9, p. 28.

Frequency counter with analog indication

Mezhlumyan A.

2004, no. 10, p. 24.

The simplest miniature avometer Bortnovsky G.A.

2004, no. 10, p. eight.

Retro 1947

High-frequency probe attachment to a digital multimeter

Nechaev I.

2004, No. 11, p. 24.

General Purpose Logic Probe

Morokhin L.

2004, no. 12, p. 25.

About powering multimeters from a power supply unit

2005, No. 1, p. 25.

Device for testing field effect transistors "PPPT-01"

Kosenko S.

2005, No. 1, p. 26.

Indicator for testing quartz resonators

Kovalenko S.

2005, No. 2, p. 22.

Laboratory meter MT-4090 from the MOTECH company

2005, No. 3, p. 77.

Ohmmeter with linear scale

Konyagin V.

2005, No. 3, p. 7.

Retro. 1976 No. 8 p. 46.

LeCroy SDA Serial Data Analyzers

2005, No. 4, p. 73.

HF generator DSG-3000

2005, No. 5, p. 75.

An attachment for measuring inductance in the practice of a radio amateur

Belenetskiy S.

2005, No. 5, p. 26.

Pulse power supply unit with acoustic switch for multimeter

2005, No. 6, p. 23.

Instruments for measuring power quality standards

2005, No. 6, p. 76.

Standalone frequency divider for multimeter M890G.

A. Kavyev.

2005, No. 7, p. 25.

Digital voltmeter for laboratory power supply.

V. Bocharnikov.

2005, No. 8, p. 24.

Repair of the combined instrument 43101.

P. Martynchuk.

2005, No. 8, p. 26.

Frequency divider of 0.1 ... 3.5 GHz range.

I. Nechaev.

2005, No. 9, p. 24.

Repair of digital multimeters with unpackaged ADCs.

D. Turchinsky.

2005, No. 10, p. 23.

A device for testing oxide capacitors.

V. Vasiliev.

2005, No. 10, p. 24.

Rotation frequency sensor DChV-2 "Delta".

2005, No. 10, p. 25.

Attachment to a multimeter for measuring power.

I. Nechaev.

2005, No. 11, p. 23.

Capacitor probe on the MAX253 microcircuit.

B. Sokolov.

2005, No. 11, p. 24.

Estimation of the equivalent series resistance of a capacitor.

I. Nechaev.

2005, No. 12, p. 25.

A. Former.

2006, No. 1, p. 23.

Once again about replacing the Krona battery.

V. Wonderworkers.

2006, no. 1, p. nineteen.

A device for testing capacitors, pulse transformers and measuring frequency.

A. Former.

2006, no. 2, p. 24.

New measuring devices. New series of digital oscilloscopes LeCroy (WaveRunner 44i, WaveRunner 62i, WaveRunner 64i).

2006, no. 3, p. 24.

Power supply of the digital multimeter from the mains.

A. Mezhlumyan.

2006, no. 3, p. 25.

"Expanding the limits of measurement of the multimeter М890G".

Y. Anferov.

2006, no. 4, p. 23.

Compact oscilloscopes WaveJet (WJ) from LeCroy (WJ312 / 314, WJ322 / 324, WJ332 / 334, WJ342 / 344).

2006, no. 4, p. 74.

Milliohmmeter.

L. Kompanenko.

2006, No. 5, p. 23.

What does an AC voltmeter show?

A. Dolgy.

2006, no. 6, p. 23.

Frequency divider 25 MHz ... 1 GHz.

V. Bukreev.

2006, no. 7, p. 21.

Voltage indicator up to 500 V.

S. Kovalenko.

2006, no. 7, p. 22.

AC adapter for multimeter

2006, no. 8, p. 21.

An attachment to a multimeter for testing low-resistance resistors.

P. Vysochansky.

2006, no. 8, p. 23.

An attachment to a multimeter for testing oxide capacitors.

A. Panshin.

2006, No. 9, p. 26.

Building a digital kilovoltmeter with an ICL7106 ADC.

A. Mezhlumyan.

2006, No. 9, p. 27.

2006, no. 10, p. thirty.

Probe for high frequency frequency meter.

I. Nechaev.

2006, no. 10, p. 32.

Determination of short-circuited turns in a network transformer.

J. Mandrik.

2006, No. 11, p. 31.

Digital multimeter with automatic range selection.

S. Mityurev.

2006, No. 11, p. 28.

Microwave generator with PLL - attachment to the RF generator.

I. Nechaev.

2006, no. 12, p. 24.

Battery-powered high voltage probe.

S. Belyaev.

2007, No. 1, p. 25.

Q-factor measurement with digital readout.

V. Stepanov.

2007, No. 2, p. 29.

O. Shmelev.

2007, no. 3, p. 24.

Computer measuring complex.

O. Shmelev.

2007, no. 4, p. 21.

Multifunctional digital frequency meter.

2007, No. 5, p. twenty.

Computer measuring complex.

O. Shmelev.

2007, No. 5, p. 17.

LED voltage indicators (compilation of two articles).

2007, no. 6, p. 25.

Computer measuring complex.

O. Shmelev.

2007, no. 6, p. 27.

Computer measuring complex.

O. Shmelev.

2007, no. 7, p. 23.

A universal measuring device based on a microcontroller.

V. Nikitin.

2007, no. 8, p. twenty.

Protection device against emergency mains voltage.

A. Sitnikov.

2007, no. 8, p. 31.

Two moisture indicators.

I. Zabelin.

2007, no. 8, p. 42.

Extra-PIC based programmer.

D. Dubrovenko.

2007, no. 8, p. 24.

Transistor rectifiers.

E. Moskatov.

2007, no. 8, p. 34.

Determination of the saturation current of inductors-magnetic circuits.

Yu. Gumerov, A. Zuev.

2007, no. 8, p. 34.

Automatic phase switch.

D. Pankratyev.

2007, no. 8, p. 44.

Once again, a control ammeter.

A. Moiseev.

2007, no. 8, p. 45.

Microcontroller computer command decoder.

M. Tkachuk.

2007, no. 8, p. 46.

Vehicle heater control unit.

I. Kuzenkov.

2007, no. 8, p. 46.

Logic analyzer program for signals at the COM port inputs.

V. Timofeev.

2007, no. 8, p. 27.

Light meter.

O. Baklashkina, E. Vaganov, O. Pivkin.

2007, no. 8, p. 38.

Voltage stabilizer 0 ... 25.5V-adjustable current protection.

M. Ozolin.

2007, no. 8, p. 29.

Security alarm device based on a mobile phone.

2007, no. 8, p. 39.

Measurement of parameters of field-effect transistors.

V.Andryushkevich.

2007, No. 9, p. 24.

Digital scale for amateur signal generator.

A. Chernomyrdin.

2007, No. 9, p. 27.

Microradiometer-attachment-multimeter.

I. Podushkin.

2007, No. 10, p. 26.

Measurement of ultra-low resistances.

A. Mezhlumyan.

2007, no. 10, p. 28.

Generator of fixed frequency-frequency counter.

N. Ostroukhov.

2007, No. 11, p. 24.

Cell phone-voltmeter-oscilloscope.

S. Kuleshov.

2007, No. 11, p. 27.

Computer control of measuring equipment mechanisms.

O. Shmelev.

2007, no. 12, p. nineteen.

Low-frequency measuring generator with analogue frequency counter.

E. Kuznetsov.

2008, No. 1, p. nineteen.

Microfaradometer.

A. Topnikov.

2008, No. 2, p. nineteen.

Small-sized frequency meter.

2008, no. 3, p. 21.

Voltmeter-INI with automatic selection of the measurement range.

E. Kuznetsov.

2008, No. 5, p. nineteen.

ESR indicator of oxide capacitors.

Yu.? Kurakin.

2008, no. 7, p. 26.

ESR meter for oxide capacitors.

I. Platoshin.

2008, No. 8, p. 18.

Oxide capacitor probe.

S. Rychikhin.

2008, No. 10, p. fourteen.

Supply voltage converter for the TL-4M avometer.

2008, No. 10, p. sixteen.

Automatic frequency meter with autonomous power supply.

S. Bezrukov, V. Aristov.

2008, No. 11, p. 18.

Tester of high-voltage devices.

2008, No. 12, p. 23.

Speaker probe generator for testing acoustic emitters.

I. Nechaev.

2009, no. 1, p. nineteen.

A device for determining the terminals, structure and current transfer coefficient of a transistor.

S. Glibin.

2009, no. 2, p. 23.

Frequency meter - a prefix to a computer.

V. Pavlik.

2009, no. 3, p. nineteen.

Miniature voltmeter on a microcontroller.

V. Kelekhsashvili.

2009, no. 4, p. twenty.

Duty Cycle Meter.

V. Nefedov.

2009, no. 5, p. 17.

Microcontroller capacitor capacitance meter.

2009, no. 6, p. 17.

Two analog frequency meters.

E. Kuznetsov.

2009, no. 7, p. nineteen.

DDS laboratory signal generator.

N. Khlyupin.

2009, no. 8, p. fifteen.

Measurement of redox potential in a liquid.

S. Lachinyan.

2009, no. 9, p. nineteen.

Two sound probes.

2009, no. 10, p. twenty.

DDS synthesizer on a microcontroller.

N. Ostroukhov.

2009, no. 11, p. nineteen.

Automatic low current meter. TSB author

From the book Great Soviet Encyclopedia (EL) of the author TSB

From the book Mobile: Love or a Dangerous Connection? The truth, which will not be told in the salons of mobile communications the author Indzhiev Artur Alexandrovich

Standards and Measurements We will use the internationally recognized Specific Absorption Ratio (SAR) to estimate a user's exposure to radio frequency (microwave) signals. It is known that the irradiation of an object with a microwave signal is determined by two factors -

From the book Guide to the magazine "Radio" 1981-2009 the author Dmitry Tereshchenko

Measurements Low-frequency functional generator G. Aleksakov, V. Gavrilin. 1981, no. 5, p. 68. Amplitude 0 ... 10 V; frequency 0.1 ... 1100 Hz; the waveform is triangular, rectangular, sinusoidal. Low-frequency functional generator G. Aleksakov, V. Gavrilin. 1981, no. 6, p. 68. Amplitude 0 ... 10

From the book The best for health from Bragg to Bolotov. A great guide to modern wellness the author Mokhovoy Andrey

From the book Autonomous Extreme Survival and Autonomous Medicine author Molodan Igor

1.5. Measurements on the ground Homemade curvimeter. You can make a homemade curvimeter to accurately measure small lengths. To do this, a circle with a radius of 16 cm (distance between

From the book Extreme Survival Tutorial author Molodan Igor

Measurements on the ground Homemade curvimeter. You can make a homemade curvimeter to accurately measure small lengths. To do this, a circle with a radius of 16 cm (the distance between the tips

The frequency meter is designed to measure frequencies in the range from 1 Hz to 50 MHz. The available element base is mainly used. The peculiarity of the frequency counter circuit is that it uses both TTL microcircuits and CMOS logic. The indication is eight-digit. The frequency meter works according to a fast scheme, that is, there is no prolonged indication period. The indicator readings are updated every second. There are no switches or controls, just an input jack and a power switch.

The circuit of the input amplifier-shaper is borrowed from L. 1. Amplifier sensitivity 0.1V, maximum input voltage 30V. Input resistance 10 kOm. On the transistor VT1, a zmitter follower is made, which increases the input impedance of the frequency meter. The amplifier - the shaper is assembled on the D1 microcircuit, - K555LA8.

This microcircuit has outputs made according to the open collector circuit, therefore, load resistors R7, R8, R11 are required. The element D1.1 is brought out to the amplification mode by applying a negative bias through the resistors R4-R5 (set when adjusting). On elements D1.2 and D1.3, a Schmitt trigger is executed, which can be blocked by applying a logical zero to pin 9.

From the output of the Schmitt trigger, the generated logic pulses are fed to the measuring eight-decadal counter on D4-D11. The counter is made on TTL-microcircuits K555 IE2, included in the decimal counting mode.

The output codes are sent to decoders on D12-D19 microcircuits. Decoders are made on K176ID2 CMOS microcircuits. Level matching between TTL and CMOS is achieved by the fact that all microcircuits are powered by 5V. And the low speed of the K176ID2 decoders does not have any effect on the operation of the circuit, since during the counting the decoder inputs are closed and open only after the D4-D11 counters stop, that is, after the end of the measurement period. Resistors R16-R47 eliminate the overload of the decoder inputs by high-frequency voltage, which may occur when measuring high frequency.

Information is displayed on an eight-digit display made up of eight single seven-segment indicators of the ALS333 type (the same as the more popular ALS324, but the numbers are larger).

The control circuit is made on a multifunctional microcircuit D2 (K176IE12) and a decimal counter D3 (K561IE8). The task of this circuit is in the formation of the measuring interval and pulses for recording information into the triggers of decoders, as well as a pulse for resetting the counters.

Before developing this circuit, the author looked through many radio amateur developments of "fast" frequency meters published in various radio amateur magazines, and found one common circuit solution when zeroing the counters and writing information to registers or decoders is performed by short pulses formed along the leading edge of the reference frequency pulse using conventional RC-chain.

At first glance, everything is correct - every second, for example, this impulse is formed and the counters are reset to zero. But the problem is that this pulse has a certain duration, and during the action of this pulse, the measuring counter is blocked. And the measuring period has already begun.

Therefore, all frequency meters built according to this scheme underestimate the readings by a certain amount, depending on the duration of this pulse. Moreover, this value is unstable, since the duration of the pulse that introduces the error depends on the parameters of the RC circuit that forms it.

Perhaps, for a low-frequency frequency meter, this error is not significant, but this is seriously reflected in the readings of a frequency meter that measures a frequency of more than 1 MHz.

Now let's look at the circuit of the control unit of my frequency meter. Chip D2 (K176 IE12) consists of a crystal oscillator and a set of counters. In a typical connection, the generator generates a frequency of 32768 Hz, which, to obtain a frequency of 1 Hz, is divided by a binary counter by 32768 (2nd).

The binary counter property is. that its output pulses, taken from one of the outputs, are always symmetrical. That is, since at the output of the D-flip-flop, which is often used in frequency meter control circuits. That is, with an output frequency of 1 Hz, there will be two equal half-periods with a duration of 0.5 seconds.

In addition, the output of the counter of this microcircuit is connected to the zeroing input (R) by the logical function "OR-NOT", therefore, while a one is applied to the input R, the output is set to zero, but immediately after the zeroing signal is removed (at the input R - zero), a logical one appears at the output, and exactly 0.5 seconds later, zero appears again.

This property of the K176IE12 microcircuit allows you to make a relatively simple control circuit that works without the above errors. But for this we need that the output of the microcircuit is not 1 Hz, but 0.5 Hz. You can get such a frequency if, instead of a domestic quartz resonator at 32768 Hz, you use a resonator at a frequency of 16384 Hz from an imported pocket digital alarm clock. Now, pin 4 of D2 will have balanced 0.5 Hz pulses. And at pin 14 - 16384 Hz

Frequency counter measures the frequency of the input signal in the range of 10 Hz… 50 MHz, with a counting time of 0.1 and 1 s, a frequency deviation of 10 MHz (relative to the fixed value), and also counts pulses with a display of the counting interval (up to 99 s). The input impedance is 50 ... 100 Ohm at a frequency of 50 MHz and increases to several kOhm at the low frequency range.

The frequency counter is based on the PIC12F629 microcontroller (DD1). The input amplifier is assembled on VT1. To display information, a digital indicator HT1610 with a built-in controller is used. The frequency meter is powered by an 8 ... 9V battery.
The supply voltage to the microcontroller is stabilized by an integral stabilizer DA1. The supply voltage to the indicator comes from the trimmer resistor R5 and is 1.4 ... 1.6V.
When the power is turned on, the microcontroller executes the measurement program with a counting time of 0.1 s. When the SB1 button is pressed briefly, the frequency value is fixed and the microcontroller measures the frequency deviation from the fixed value. Pressing SB1 again returns the counter to its original state. To switch to the frequency measurement mode and its deviation with a counting time of 1 s, press SB1 and hold it for at least 2 s. Pressing SB1 again switches the frequency counter to pulse counting mode. In this mode, pressing the button starts, stops and resets the counter and measurement time indicator.

The frequency and its deviation are displayed on the frequency counter in hertz, in the interval of 0.1 s the indicator looks like 1FXXXXXXXX or 1F | _XXXXXXX (1F-XXXXXXX) for the frequency deviation, and the sign indicates its increase or decrease. | _ - since + is not provided in the indicator, it is displayed as | _.

In 1 s mode, the first character of the indicator is changed from 1 to 2 - 2FXXXXXXXX.

In the pulse counting mode, the indicator will display - CCUUUUUU, where SS is the counting time and UUUUUUUU is the number of pulses. At the end of the count, the state of the indicators is fixed.

Details:

trimmer resistor SP3-19
fixed resistors C2-23 or MLT
trimmer capacitor KT4-25
chip LM2931Z-5.0 can be replaced with 78L05
the microcontroller can be programmed with Pony Prog, IC Prog.

Setting:

adjust the frequency of coincidence between the indicator and the reference frequency meter using C5
R1 - sensitivity to the input signal.

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In any radio amateur laboratory, a frequency measuring device is simply needed, which will allow in the development, design, production, manufacture, repair, adjustment and tuning of various electronic devices.

Small-sized frequency meter

The diagram of a small-sized frequency meter of the middle class of accuracy, which satisfies most of the needs of a radio amateur, consists of a small number of parts, is designed in the form of a probe, which is very unusual for a frequency meter and is convenient.

About supply voltage of microcircuits DD6-DD10, DD2.

A drawing of a possible version of the printed circuit board of a small-sized Puzyrkov frequency meter.

Portable frequency counter

In any radio amateur laboratory, a frequency measuring device is simply needed. Unusually, the design of this frequency meter provides for the possibility of auditory control of the measured frequency using a piezoelectric emitter, and there is also a service for self-diagnosis of a good condition.

Drawing of a possible version of the printed circuit board of the portable Tokarev frequency meter.

A modified version of the frequency counter, as a result of which it turned into a capacitance meter from 50 pF to 5 μF.

Prescaler

Electronic frequency meters, assembled on widespread microcircuits of the CMOS structure, with all their advantages (simplicity of the circuit design, low power consumption, small mass-dimensional properties), have one significant drawback: a low upper limit of frequency measurement (several megahertz), which greatly limits their area application. But for these purposes it is not at all necessary to acquire a high-frequency device. You can adapt the existing radio amateur frequency meter by first reducing the frequency of the input signal by a known number of times, thereby raising the cutoff frequency of the device to 250 MHz. The described device can also be used in conjunction with an oscilloscope for the same purposes.

Most amateur frequency meters are built according to a typical scheme, when there is a counting time during which the periods are counted during this time (while the indicators are usually extinguished), then the indication time follows - the time during which the input of the decade counter is blocked and the indicators are lit, then the indicators go out and zeroing the counter, and the process is cyclically repeated. Despite its prevalence, this method of measuring frequency has significant drawbacks.

Firstly, the whole measurement process, in time, mainly consists of the counting time and the indication time, which, when measuring low frequencies, can total 2-3 seconds.
Secondly, the indicators are constantly blinking, which is also not very pleasant.

The proposed design differs in that there is practically no indication time - the indicators are constantly on, but after each time the counts change their readings.

As a result, the entire measurement process takes just over one second. This is achieved thanks to the introduction of one four-digit memory cell in each decade of the decade counter. In which, until the end of the measurement cycle, information about the measurement result in the previous cycle is stored, then it is changed.

The schematic diagram is shown in the figure. Decade counter six-digit on D1-D18. The same K561IE14 microcircuits are used as counters and memory cells, in the first case they are included in the counting mode, and in the second - in the preset mode.

Frequency meter characteristics:

1. Number of display digits ..................... 6
2. Range of measured frequencies ........ 1 Hz-1 MHz.
3. Measurement cycle time ................. 1.2 sec.
4. Input sensitivity .............. 250 mV.
5. Input impedance ................ 10 kΩ.

Let's consider the work on the example of the least significant bit. The control unit is made on D20 and D19. For its operation, pulses with a frequency of 8 Hz must be received at the input C D20. In the initial state, D20 and D1 are in the zero state. As soon as D20 goes into the "1" state, the D19.3 D19.4 flip-flop is set to zero and opens the D19.1 element, through which pulses from the input shaper to VT1 and VT2 arrive at the input C D1.

This continues until D20 counts to "9". At this moment, the trigger is set to a single state and closes element D19.1. D1 input no longer receives pulses. At the same time, a positive pulse from pin 11 of D20 goes to pin 1 of D2 and turns on the preset counter D2 mode. As a result, the code from the D1 outputs is "copied" to the D2 outputs, and will remain unchanged there until the second pulse arrives at this pin.

Then, after a very short time (time of charging C1 through R43), the counter D1 is set to zero. As soon as D20 returns to state "1" the process is repeated.

Thus, the time of the entire measuring process is more than halved and the flashing of the LED indicators is excluded.

To obtain a frequency of 8 Hz, necessary for the operation of the control unit, a multivibrator on a TTL-D21-K155LAZ microcircuit is used, the frequency of which (8 MHz) is stabilized by a quartz resonator, then a TTL divider by 10 - D22 - K155IE2 and five decimal dividers by microcircuits D23-D27 - K561IE8. The use of TTL microcircuits is due to the fact that the K561 series does not work well at frequencies over 3 MHz. It is possible to use a more common 4 MHz resonator, but for this you need to turn on one of the D22-D27 counters according to the division by five scheme.

All frequency counter microcircuits are mounted on one prototype printed circuit board with dimensions of 240X160mm with wiring only for power circuits and pads for each microcircuit pin (such boards were widely available several years ago and were even sent by cash on delivery). All other connections are made with MGTF 0.12 mounting wire in accordance with the diagram.

If there is such a nuisance, it is necessary to put a 10-56 pF capacitor of the KM type between this output and the common wire at the transfer output "P0" of the corresponding "hairy" counter, having selected its capacity experimentally. In this case, the "hairiness" will either disappear completely, or its level will not reach a single threshold. It is extremely rare to come across K561IE14 microcircuits with "hair" even at pins 6, 11, 14 and 2. You can deal with a nuisance in the same way, but it is better not to use such microcircuits if possible.

The same may be required if the D23-D27 counters are divided incorrectly (at the output, not 8 Hz). Here you need to put a capacitor between pin 12 and the common wire. The power supply is stabilized for a voltage of 5V. Seven-segment LED indicators can be of any type, it is important that with a common anode.