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Audio Amplifier for Personal Stereo

In the output stages of most broadcast receivers and some amplifiers, there is a limit up to which maximum power can be developed without...

Telephone Line Based Audio Muting and Light-on Circuit

Very often when enjoying music or watching TV at high audio level, we may not be able to hear a telephone ring and thus...

Low-Cost PCO Billing Meter

The circuit presented here can be used in PCOs for displaying the actual bill. The comparative disadvantages of the presented circuit are as follows: 1....