We found this TTL power supply circuit in the December 1972 issue of Radio Electronics magazine. The circuit uses a 1 A transformer and the 2N3055 transistor must be equipped with a good heat sink.
We have in the figure a traditional amplifier configuration with operational amplifier. The source...
This circuit was found in a 1977 Radio Shack documentation. The circuit is TTL, which must be...
This circuit is suitable for modulating small FM transmitters for eavesdropping or espionage. The...