Suggested by a 90’s Radio Electronics, this circuit automatically activates the recording switch of an old tape recorder. It can be adapted for other purposes.
This circuit reinforces the treble, working as a booster for instruments or home theater. The...
This circuit was found in an old Motorola documentation from the 70s, as it uses one of its...
We found this small amplifier in a 1973 technical publication. The critical components are the...