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.
This circuit causes an LED to flash if the monitored voltage exceeds the value set in the pot. The...
This circuit is from a Radio Electronics magazine from August 1990. The indicator module is of a...
The modified Hartley oscillator seen in the figure can generate signals ranging from 3 MHz to 10...