LED Based Car Battery Voltmeter

admin May 25, 2010 2 Comments
Circuit Description Here is a simple car battery voltmeter circuit using LEDs that can be easily installed in cars. This circuit consists of four LEDs and a quad operational amplifier IC LM 324 as its main part. This circuit...
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Simple Metal Detector Circuit

admin May 25, 2010 3 Comments
Circuit Description The circuit diagram of cost effective metal detector has been published here. This circuit and an old pocket radio constitute a simple metal detector device. This circuit is a Colpits oscillator circuit is operating at medium frequency...
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