Found in Popular Electronics from the 90s, this circuit is intended for a radar emitting pistol. The circuit is very critical for the frequency at which it operates.
The circuit shown simulates a programmable unijunction transistor (PUT). Transistors may be common...
This electronic car lock was found in a 1988 magazine. It uses a code key that must be activated to...
The diagram shows an AND gate implemented with an LM3900 transconductance operational. The circuit is...