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SIMPLE_INTERCOM_FOR_NOISY_ENVIRONMENTS

2014-11-07 05:03  
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SIMPLE_INTERCOM_FOR_NOISY_ENVIRONMENTS
This intercom was originally designed for motorcycle to passenger communications A simple"passenger-to-pilot”ttercom circuit is shown. Two LM386 ICs are connected in a low-gam amplifiercircuit with the headphone output of one paired to the microphone input of the other The microphones are electret elements and the earphones can be of the in-ear type or of the small stereo/monotype that with fit inside a helmet Both amplifiers in the circuit operate at a minimum gain of 20 dB.