Solar intercom (CB20503E)

This circuit can be used in demonstrations or science fairs. The circuit uses headphones and can be powered by solar cells.

Using a Loudspeaker as Microphone (CB831E)
A small loudspeaker (2.5 or 5 cm) can be used as a low impedance microphone. A preamplifier and...
Gated Oscillator - Three Gates (CIR107E)
To turn on the configuration of CIR106E using a “’1" logic level, the circuit is given here. To...
TPS54200 LED Synchronized Buck Driver (COM195E)
January 2017 - Texas Instruments' new TPS54200 integrated circuit for excitation of LEDs with a...