This small FM spy transmitter uses three transistors with an RF amplification stage. We found it in an Australian publication from 1991.
This circuit was found in documentation from the 90s in Europe. The circuit shows how to vary the...
This variable duty cycle circuit was found in the December 1993 issue of Electronics Now magazine. The...
The current of this charger is determined by Rs. The circuit is from the 1982 SGS linear...