Found in a 1965 General Electric Hobby Manual, this timer was originally created to operate with photo magnifiers of the time. The circuit can be adapted for other purposes.
This circuit for RF signals was found in the March 1987 issue of Radio Electronics magazine. The...
We found this circuit in Texas Instruments' Linear Circuits Applications. It is a low consumption peak...
This medium wave radio must use a high impedance piezoelectric, crystal or magnetic phone and the...