This circuit is from a 1968 publication. Here we have several types of resistive sensors with individual adjustments triggering a single SCR. Power depends on the type of sound device to be triggered.
This circuit was obtained from a 1994 publication. Its purpose is to digitally switch 5 audio...
This circuit appears elsewhere in this section, but taken from other sources. This is an English...
In this oscillator circuit using 3 TTL inverters we have all the conditions for the frequency...