This circuit for a 16-channel infrared transmitter was found in the August 1984 issue of Radio Electronics magazine. The circuit is powered by a 9 V battery.
This circuit was obtained in a Radio Shack documentation from 1977. The circuit generates a...
This commercial circuit of 3 transistors was found in Japanese documentation from the 1960s. The...
This electronic car lock was found in a 1988 magazine. It uses a code key that must be activated to...