This circuit supplies 5 V from two AA batteries. The output current is 4 mA, resulting in an 11 mA input current from the batteries. The circuit is from an old EDN.
Found in a 1974 Radio Shack documentation. This circuit must have a connection to the ground of...
September 2016 - can already be purchased at Mouser Electronics the Robot Scribbler S3 from...
This circuit is from an English publication from 1979. It describes the assembly of a sensitive touch...