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Simple Door Bell Circuit

admin May 28, 2010 1 Comment
Circuit Description The circuit diagram of door bell circuit using UM 66 IC has been published here. This is the simplest door bell circuit in which the central part is the IC UM 66 as the name says. The...
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Simple 7-Segment Counter Circuit

admin May 27, 2010 3 Comments
Circuit Description The circuit diagram of 7 segment counter circuit has been published here. This circuit consists of counter IC CD 4033 as its central part, timer IC NE 555 and 7 segment display LT 543. In this circuit,...
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Train Horn Circuit

admin May 27, 2010 1 Comment
Circuit Description The circuit diagram of dual tone train horn circuit has been described here. Here in this circuit, the core part is the timer IC NE 556. This NE 556 IC is the combination package of two NE...
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Simple Touch Switch Circuit

admin May 26, 2010 1 Comment
Circuit Description Here is the circuit diagram of touch switch circuit using timer IC NE 555. As the name says this circuit is based on NE 555 IC. This circuit is a simple touch plate controller which when touched...
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Simple Lamp Flasher Circuit

admin May 26, 2010 No Comments
Circuit Description Here is the circuit diagram of Lamp Flasher using NE 555. As the name says the heart of this circuit is the timer IC NE 555. This circuit is operating from 230V AC mains. In this circuit,...
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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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Simple Photo Switch Circuit

admin May 24, 2010 2 Comments
Circuit Description The circuit diagram given here is a photo switch which switches on a relay when the intensity of light falling on its sensor changes from a preset limit. The central part of this circuit is the IC...
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Simple Melody Generator Circuit

admin May 24, 2010 2 Comments
Circuit Description The circuit diagram given here is a simple melody generator. The core part of the circuit is the IC UM66 which is a CMOS type IC. One of the main features of this circuit is that in...
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