This is the receiver for the earlier system published in the August 1988 Radio Electronics magazine. Optical capabilities can be used for extended range.
We found this circuit in an old American publication. It is a signal emitter that sends a command to...
Based on the CA3161 and CA3162, this circuit was found in the July 1990 Radio Electronics...
This two-transistor amplifier can be used as power stage for intercom, experimental receivers,...