Found in the December 1986 issue of Radio Electronics magazine, this circuit is designed to select 4 outputs with pulses from a pressure switch. The circuit includes LED indication.
This circuit generates a pulse of approximately 1 second when the light incident on the sensor...
The 3403 operational amplifier is not common today, but the configuration can be implemented with...
This circuit, published in 1978, can use any general purpose NPN transistor such as the BC548 and...