Solar intercom (CB20503E)

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

Mini no breake (CB22151E)
This circuit was found in old English documentation. When the main power is interrupted, the...
300 to 3,000 Hz Speech Filter (CB6543E)
Found on an 80's Radio Electronics, this two-section circuit is designed to pass the frequency...
13 V x 2 A power supply (CB15673E)
This unit is ideal for powering car radios, tape players or car CD and DVD players from the power...