Inductance Meter Circuit
This inductance meter is actually an adapter to your digital voltmeter (DVM). Using this circuit now your voltmeter is capable of measuring inductor value. Indu...
ISOLATED AC CURRENT MONITOR
This circuit uses a small AC current transformer from Magnetek to produce an isolated voltage proportional to the AC current in the primary winding...
ICL7135 Typical Diagram and Datasheet
ICL7135 Typical Application Schematic Diagram appears in the following circuit illustration. This A/D (Analog to Digital) converter with all necessary active de...
VU Meter 2
A circuit of measurement of level based on a typical application of National...
Quick On-Board Junction Tester
Short circuits or broken pcb tracks can be easily recognized by means of a Multimeter, but this tool can give wrong results when testing the efficiency of a tra...
High Side Current Sensing for Low Side Switching
An AD8205 can be used to make a high-side current sense with a low side switch. Besides AD8205, an inductive load (solenoid) and a resistive shunt are added in ...
High Impedance DC Voltmeter using MOS Op-Amp
The circuit was designed for the purpose of creating a voltmeter with high impedance that would measure Direct Current voltages across any types of circui....
Frequency To Voltage Converter: Change Your Voltmeter To Frequency Meter
Frequency meter can be used in speed sensor, tachometer, or any measurement of repetitive signals. This frequency to voltage converter (FVC) can be used to turn...
FETVM-FET Voltmeter
This circuit is a series-FET Voltmeter FETVM. This FETVM to replace VTVM function while at the same time line used to clean the appliance cord. In addition, the...
F/V Converter for Tachometer Bar Graph Display
We can construct a tachometer using the TC9400 in the F/V mode to convert the frequency information (RPM) into a linearly proportional voltage. Then we can comp...
Digital Radar Speedometer
This circuit is a Digital Radar Speedometer. It allows us to evaluate the speed of any object moving, especially cars and other vehicles. The speed is calculate...
Digital LED Voltmeter Using ICL7107
This circuit is a circuit diagram digital voltmeter with LED display. It`s ideal to use for measuring the output voltage of your DC power supply. It includes a ...
Decibel Meter
The circuit below responds to sound pressure levels from about 60 to 70 dB. The sound is picked up by an 8 ohm speaker, amplified by a transistor stage and one ...
DC-10Khz frequency-voltage converter
The converter generates an output voltage which is linearly proportional to the input frequency waveform. Each zero crossing at the comparator`s input causes a ...
Current Sensing for High Voltage Application
High voltage current sensing/monitoring can be designed using LTC6101 op-amp. The following current sensing circuit is capable of measuring electrical current....
Constructing Voltmeter Monitor Circuit using LM3914
With a few resistors, LEDs and using a LM3914 bar/dot display driver IC we can construct a simple 5V Voltmeter Monitor Circuit which provides TTL-compatible und...
Computer Controlled Frequency Counter/Logic Probe
This circuit is a stable frequency counter accurate to 5 significant digits. The range is 0 - 30MHz with an input sensitivity of greater then 100mV. The probe c...
Capacitance Meter Circuit
Capacitance meter is one instrument that you should have in your toolbox if you are an electronics hobbyist, or if you`re a professional electronic technician ....
Capacitance Meter Circuit Using Transistors
This capacitance meter circuit is similar with previous meter circuit, but it uses transistors rather than logic gates. Here is the schematic diagram: You....
Cable LAN Tester Circuit
cable LAN tester circuit can also to test cable on telephone, coaxial cable, Lan cable and other. this circuit using led for main indicator device...