Direct Coupled Radio Circuit

admin May 16, 2010 No Comments
Circuit Description Here is the circuit diagram of direct coupled radio. The central and core part of this circuit consists of three transistors Q1 (HEP 641), Q2 (HEP 253) and Q3 (HEP 641) as shown in the circuit diagram....
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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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Audio Distortion Meter Circuit

admin May 13, 2010 1 Comment
Circuit Description The circuit diagram of audio distortion meter has been described here. Audio distortion meter is used to measure Total Harmonic Distortion (THD) on any load. This device can measure harmonic distortion at any output power. In this...
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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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6 Volt Regulator Circuit

admin May 13, 2010 2 Comments
Circuit Description The elementary circuit diagram of 6V voltage regulator has been given here. The main part of this circuit is the voltage regulator IC 7806. . This IC 7806 is a three-terminal positive voltage regulator. This IC is...
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FM Radio Circuit Using TDA 7000 IC

admin May 13, 2010 1 Comment
Circuit Description Figure shows the circuit diagram of Single chip FM Radio circuit. This circuit is based on the monolithic IC TDA 7000 which is the central part of this circuit. This IC TDA 7000 contains a Frequency-Locked-Loop system...
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