The telephone pickup small amplifiers using LM358

Electronic projects circuits Collection of electronic circuits with PCB layout View this email in your browser This circuit is the telephone pickup small amplifiers for To expand the voice conversation louder. or intercepted phone call. It use pickup telephone and LM358 op-amp IC as preamplifier and LM386 out to speaker and use 9V battery Low power consumption. [...] Read more: http://www.eleccircuit.com/the-telephone-pickup-small-amplifiers-using-lm358/ Copyright © 2013 Eleccircuit.com, All rights reserved. unsubscribe from this list    update subscription preferences