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.
Found in an English documentation from 1989, this circuit uses components common today. The...
The LED frequency flashes depends on the value of the capacitor tested according to the table. We...
Found in a Popular Electronics from the 90s, this circuit generates a signal that depends on the...