This is the receiver for the previous transmitter. The signal consists of digital pulses with a compatible TTL or CMOS output. The integrated circuit is a 4093 and a photodiode of any type.
The circuit shown in the figure causes an LED to light up or a relay to close its contacts when...
This non-inverting AC amplifier was found in the February 1990 issue of Radio Electronics...
This sophisticated circuit of the coin-toss game was found in an American 1980s documentation. The circuit...