Found in an Electronic Design of 1964, this circuit can control up to 20 SCRs in a trigger system powered by 24 V. The SCR supports a modern equivalent.
We find this ultra-simple transmitter circuit that is nothing more than a very short range RF...
The circuit shown is from National Semiconductor's Linear Applications Handbook published in 1994....
This configuration that appears several times with variations on this site is from old American...