This circuit was found in a 90s Popular Electronics. The integrated circuit used is uncommon today. The power is about of 2 W.
The simple touch of the fingers on a sensor causes this circuit to drive a motor that goes into...
This simple circuit found in an American 80's documentation simply blames if there are toxic gases in...
This circuit is from Motorola's 1990 Linear Databook. The transistors allow equivalents and the...