This circuit is from a Radio Electronics from March 1970. The integrated circuit used is one of the first for this purpose, being improved later leading to types that succeeded it.
aaa The circuit shown generates 100 kHz signals for calibrating the scale of a receiver in 100 to...
This circuit can be used as a residential doorbell. We found it in an English publication from...
This circuit was found in an 80's Electronic Engineering. The power supply must be symmetrical. The...