Interval for wiper (CB22113E)

This windshield wiper interval was found in an old documentation. The SCR can be the C106 and the transistor a BC548.

Power grid remote control (CB5070E)
This remote control receiver via the power grid appears elsewhere on this site from other sources....
Small Transistor Amplifier (CB20307E)
This fraction watt amplifier uses transistors that are still quite common in our market. The power...
Light Beam Operated Relay (CB4956E)
This circuit was found in an old American magazine and could make use of more modern components...