Found in a 300 Circuits from the 90s, this circuit can deliver a maximum current of 50 mA. The output is 20 V with a 12 V input.
This circuit with TTL output was found in a 1968 EEE. The transistor can be of general use. The...
This 100-second timer was found in a 2000 Poptronics. The magazine no longer exists, but the...
This control for a small servomotor with a current of a few hundred milliamps was found in an...