This is the transmitter for a remote-control system published in the August 1986 issue of Radio Electronics magazine. The circuit uses two 555 CMOS transistors to drive two series LEDs.
This useful instrument has dual function, operating both as signal injector and continuity tester. The...
This fully passive circuit was found in documentation from the 1970s. The circuit uses an optical...
This table with the antenna design allows to size the antenna according to the frequency of the...