This circuit of an EDN divides the input pulse frequency by even values. The circuit is TTL and can be used as a shield for microcontrollers.
This circuit was found in the June 1990 issue of Radio Electronics magazine. Integrated circuits must...
The figure shows an application of the LM377 in a small inverting stereo amplifier with output...
This is a possible circuit for the receiver of the previous circuit. Other circuits can be found...