This circuit may be of interest to restorers of old video equipment. We found it in the Radio Electronics magazine of December 1989.
July 2016 - It can be obtained from Mouser Electronics new trinkets Adafruit. These trinkets are...
We found this circuit in a 1975 radio amateur documentation. The circuit uses TTL technology and...
Equivalent transistors like the BC548 can be used on this 1969 Mullard circuit. The circuit has two...