Light Activated Switch

admin June 1, 2010 1 Comment
Circuit Description The circuit diagram of light activated switch circuit has been described here. The core part of this circuit is the operational amplifier IC LM 311which acts as a voltage comparator here. This circuit also consists of an...
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Simple Function Generator Circuit

admin May 31, 2010 1 Comment
Circuit Description Here is the circuit diagram of common function generator circuit. The central part of this circuit is the function generator IC ICL 8038. This function generator IC can generate waveforms such as sine, square and triangular at...
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Simple Battery Monitor Circuit

admin May 31, 2010 1 Comment
Circuit Description Here is the circuit diagram of simple battery monitor circuit. The main part of this circuit are the IC MN13811G from Panasonic and an efficient flasher circuit based on transistors Q1 (BC 558) and Q2 (BC 548). This...
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Window Foil Burglar Alarm Circuit

admin May 30, 2010 4 Comments
Circuit Description The circuit diagram of window foil burglar alarm has been published here. The main parts of this circuit are SCR H1 (TYN 612) and transistor Q1 (BC 107). This burglar alarm can be fitted in windows to...
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Simple Tweeter Crossover Circuit

admin May 30, 2010 1 Comment
Circuit Description The circuit diagram of tweeter crossover circuit has been described here. The advantage of this circuit over circuits of single coil speaker is that it can handle both high and low frequency signals simultaneously. A tweeter circuit...
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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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