Voltmeter + Ammeter LCD panel
This multimeter was designed to measure output voltage and current in a PSU, where the current sense shunt resistor is connected in series with load at the nega...
Led display digital Voltmeter
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The Application of TDC-GP21 in Ultrasonic Heat Meter
Enhancements include: analog front end, pin-to-pin compatibility (for existing designs), analog stabilized comparator and simplified external circuit design, im...
RF Inductance Meter
This RF inductance meter measures RF chokes in the 500 nH to 50 uH range. I needed a way to measure hand-wound RF inductors in my second lab, and since I would ...
LM1800 Stereo Demodulator
Build your own Accurate LC Meter (Capacitance Inductance Meter) and start making your own coils and inductors. This LC Meter allows to measure incredibly small ...
60MHz Frequency Meter / Counter 10Hz to 60MHz
This project is nice and small frequency counter that reads frequency from 1 Hz to 50 MHz that I have modified from original designed by Weeder Technologies . I...
3 Digits Digital Volt Meter with PIC16F676
This is simple 3-digits digital volt meter.PIC16F676 used to read analog signal(voltage) and display the value on 3-digits 7-segment. You can apply similar prin...
ICL7107 / ICL7106 - Digital Voltmeter
This digital voltmeter is ideal to use for measuring the output voltage of your DC power supply. It includes a 3. 5-digit LED display with a negative voltage in...
Microcontroller Voltmeter / Ammeter with LCD
Rectifier bridge voltage. See U2 element you used data sheet to know about maximum voltage it can work properly. On the other hand the minimum voltage on that p...
Voltmeter Ammeter
This Voltmeter Ammeter was designed to measure output voltage of 0-70V / 0-500V with 100mV resolution and 0-10A or more current with 10mA resolution. It is a pe...
Frequency Meter / Frequency Counter 10Hz-60MHz
60MHz Frequency Meter / Counter measures frequency from 10Hz to 60MHz with 10Hz resolution. It is extremely useful bench test equipment for testing and measurin...
30V Volt Meter with PIC16F676
This is a simple 30V volt meter using PIC16F676 micro controller with 10-bit ADC (analog to digital converter) and three 7 segment LED displays. You can use thi...
Resistance Measurement System
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True Rms Converter
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Design A Low-Cost 4- To 20-mA Receiver Circuit For Control Loops
Design A Low-Cost 4- To 20-mA Receiver Circuit For Control Loops | analog-to-digital converter (ADC)....
Ultimate Continuity Tester Hides Many Tricks Up Its Sleeve
At the time, I wanted to build The Ultimate Continuity Tester, and I established a wish list of all the features I required: A real continuity tester. Too...
Sense Small Inductance Changes Over A Wide Range
Small inductance changes on the order of 0. 01% can easily be sensed over a wide range with a simple circuit connected to a serial port ( see the figure ). Usin...
analog-to-digital converters (ADCs)
analog-to-digital converters (ADCs) | printed-circuit board (PCB) | microcontroller or digital signal processor (DSP) | total-harmonic-distortion (THD) | ignal-...
simple led voltmetercircuit
This circuit is for a simple LED `bar graph` voltmeter. Each op-amp of the 339 quad operational amplifier is used as a comparator for comparing the input voltag...
lowvoltage ac voltmeter
The main component of this circuit is an operational amplifier (such as the 741 or 351), configured as an amplifier whose feedback circuit is a diode bridge ful...