Landline Telephone Telephone Circuit Diagram. The capacitor in the circuit stops the DC in to pass. It use pickup telephone and LM358 op-amp IC as preamplifier and LM386 out to speaker and use 9V battery Low power consumption.
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Security Saftey Television - TV Related No Comments. It use pickup telephone and LM358 op-amp IC as preamplifier and LM386 out to speaker and use 9V battery Low power consumption. Telephone Set Transmitter Carbon Granule Transmitter. The most classical telephone ringer circuit is a mechanical bell controlled by an electronic coil.
