This circuit was found in Philips documentation from 1969. The components are from the time including transformers that are commercial types.
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...