This old circuit from the 80's generates logic signals with 50% active cycle (squares). The integrated circuit used is not common today, but equivalent logic functions can be used in a modern version.
We found this circuit in an American publication in 1973. The circuit generates a low frequency signal...
The L293 circuit is not common today. We found this circuit in the 1982 SGS linear integrated...
This circuit makes use of an uncommon integrated circuit. It can provide a power of 6 W when...