Another of the many similar configurations we have in this section. This one is from a Radio Electronics magazine from June 1985. The transistor is according to the power of the controlled motor.
We found this junction tester circuit in an old English documentation. The circuit serves to check...
This circuit can generate signals up to 100 kHz. Found in documentation from the 1980s, it makes...
Found in American documentation from the 70s, this circuit uses components of the time, uncommon...