Op-Amp Radio Circuit

admin May 24, 2010 2 Comments
Circuit Description Here is the circuit diagram of simple operational amplifier radio that can be employed to hear nearby stations. This circuit is based on quad operational amplifier LM 324. This operational amplifier radio consists of crystal radio and sensitive...
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Simple PWM Motor Speed Controller

admin May 18, 2010 4 Comments
Circuit Description Here is the circuit diagram of PWM motor speed controller. The application of this circuit lies in the speed control of low power DC motors. The core part of this circuit is the IC CD40106B in which...
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Simple Musical Light Chaser Circuit

admin May 17, 2010 3 Comments
Circuit Description The circuit diagram of musical light chaser has been described here. The main parts of this circuit are two transistors Q1, Q2 (BC 107) and IC1, IC2 (CD 4017). Transistor Q1 in this circuit acts as amplifier...
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Simple Level Switch Circuit

admin May 16, 2010 1 Comment
Circuit Description The circuit diagram given here is a simple level switch that switches relays between two states according to the fluid level. The main parts of this circuit are three transistors Q1, Q2, Q3 (BC 107) and two...
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Simple Scream Generator Circuit

admin May 15, 2010 2 Comments
Circuit Description The circuit diagram given is Scream generator circuit. This is ideal for alarm or car horn. The core part of this circuit consists of two transistors Q1 (BC 107) and Q2 (BC 177). A switch S2 is...
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Simple Multi-Tone Alarm Circuit

admin May 13, 2010 2 Comments
Circuit Description Figure shows the circuit diagram of multi tone alarm. This is basically an amplifier circuit. The central part of this circuit is the dual operational amplifier IC MC 1458 and the operational amplifier LM 380. The IC...
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Simple Electronic Combination Lock Circuit

admin May 3, 2010 3 Comments
Circuit Description This section describes the circuit diagram of simple electronic combination lock. The central part of this circuit is the IC LS 7220. This circuit is used for the activation of a relay which controls a device on/off...
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