Flat response amplifier CIR16474S CB9390E (CB9390E)

This circuit was found in a 1970s documentation. The integrated circuit used is uncommon today.

Transistor flasher (CB9785E)
This circuit has a very traditional configuration that can be found elsewhere on the site. R2 and...
Microphone preamplifier (CB9311E)
Found with variations on this site, this circuit was taken from an American documentation from the...
Battery Charger (CB4974E)
This charger for a maximum current of 15 A was obtained from an American 80's schematics. The triac must...