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Microphone Pre-amplifier Circuit

admin June 2, 2010 2 Comments
Circuit Description Here is the circuit diagram of three input microphone preamplifier. This is a mic mixer preamplifier centered on the high gain operational amplifier IC LM 348. This IC LM 348 is a quad operational amplifier IC that...
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Capacitance Meter Circuit

admin June 2, 2010 4 Comments
Circuit Description The circuit diagram of simple capacitance meter has been published here. The core part of this circuit is the frequency to voltage converter IC LM 2917 developed by National Semiconductors. This IC LM 2917 is a monolithic...
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