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Absolute-Value Meter With Polarity Detector – Circuit Schematic
Absolute-Value Meter With Polarity Detector
This circuit breaks an input voltage signal down into its components: (1) the absolute value and (2) the polarity or ‘sign (+ or ). It will handle direc.....
4-Bit Analog to Digital Converter – Circuit Schematic
4-Bit Analog to Digital Converter
The operation of the converter is based on the weighted adding and transferring of the analogue input levels and the digital output levels. It consists of.....
4-20mA Current Loop Tester – Circuit Schematic
4-20mA Current Loop Tester
This design will interest technicians who work on pneumatically operated valves and other 4-20mA current loop controlled devices. Although 4-20mA signal i.....
12/24/48 V D.C. Tester – Circuit Schematic
12/24/48 V D.C. Tester
The present tester is intended primarily for testing the 24 V electrical circuits found on most pleasure craft. However, if the resistors are given different va...
How to Add Auto Turn-Off to a Multimeter – Circuit Schematic
How to Add Auto Turn-Off to a Multimeter
Most multimeters today have an auto turn-off feature built in. There is enough space in a multimeter enclosure so why not to install a simple circuit that.....
Digital Voltmeter and Ammeter Using CA3161E and CA3162E – Circuit Schematic
Digital Voltmeter and Ammeter Using CA3161E and CA3162E
1N4001 a 1Amp Silicon rectifier with voltage range of 50 to 1000 Volts and possessing features such as guaranteed high temperature soldering, high current capab...
Arduino Based Current Sensor Circuit – Circuit Schematic
Arduino Based Current Sensor Circuit
The main component used is the ACS712 sensor from Allegro MicroSystems to measure the current. It provides economical and precise solutions for AC or DC current...
Open source USB scope – Circuit Schematic
Open source USB scope
There are plans to make it 1Gsps in the future, using interleaved ADCs and staggered clock, but that`s beyond me at the moment, so the first iteration will only...
Inductor saturation tester alternative route to dump the excess energy – Circuit Schematic
Inductor saturation tester alternative route to dump the excess energy
Yes, it does charge the inductor again. Diodes are a good that they will not charge the inductor back but of course dissipate fair amount of instantaneous power...
Extending the sound beeper volume of an Multimeter – Circuit Schematic
Extending the sound beeper volume of an Multimeter
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Pulse meter circuit – Circuit Schematic
Pulse meter circuit
The input cap for The phototransistor at the bottom is what feeds the opamp. But the output from the phototransistor is always between GND and Vcc. So why the n...
Current sense schematic question – Circuit Schematic
Current sense schematic question
Looking at different ways to do current sensing, using regular opamps, rather than dedicated chips like the MAX4073T/F/H, which work well, they are just rather ...
Simple Voltmeter schematic using Maxims ADC with LED driver – Circuit Schematic
Simple Voltmeter schematic using Maxims ADC with LED driver
Using MAX1496 an ADC with LED drivers, you can make your own 3 1/2 digit voltmeter with just a handful of components. It even has external/internal Vref, HOLD a...
Method tests continuity in AC and DC – Circuit Schematic
Method tests continuity in AC and DC
Check out this specialized test gadget that tests continuity quantitatively in both AC and DC modes; it could prove to be an indispensable general bench test in...
Use a transistor and an ammeter to measure inductance – Circuit Schematic
Use a transistor and an ammeter to measure inductance
Bipolar junction transistors transfer a current from a lower-resistance emitter to a higher-resistance collector. You can use this property to measure inductanc...
Sense automobile high-side current with discrete components – Circuit Schematic
Sense automobile high-side current with discrete components
This Design Idea came about as a result of my not having access to those wonderful new ICs that sense current. I needed a discrete circuit that I could build ea...
Digital Thermometer using ATmegsa8 and LM335 – Circuit Schematic
Digital Thermometer using ATmegsa8 and LM335
hello , I am planningto build Digital Thermometer using ATmegsa8 and LM335. Can Somebody tell me how should i go about ?? I want to display it on.....
LED voltmeter schematic needed – Circuit Schematic
LED voltmeter schematic needed
Hello, I need a simple to make LED based (not 7-segment) voltmeter to monitor the voltage of a variable supply. I have found this circuit.....
digital thermometer – Circuit Schematic
digital thermometer
Can someone help me find a schematic and codes about a digital thermometer using a LM35 and 7 segment display(0 - 150.5 degree celcius)..the code must .....
Looking for schematic diagram of AD574 IC – Circuit Schematic
Looking for schematic diagram of AD574 IC
hi, Dears . I want to use AD574 ( The ADC574A is a 12-BIT successive approximation analog-to-digital converter .) i want to know , How work this IC ?? .....