Windscreen Wiper Interval timer (CB6043E)

This circuit was found in a former Popular Electronics. The timing is set on the potentiometer and the relay is sensitive to 12 V.

50 mA Battery Charger (CB878E)
This simple circuit is designed to charger AA or AAA Nicad batteries. Current can be changed...
Distortion circuit 3 (CB4873E)
One more distorting circuit or guitar fuzz. This was found in an American 1980s documentation. The...
Inductive Pickup Link For Headset (CB4526E)
This circuit is a handset receiver that picks up the signal emitted by a coil under the rug or...