Flat response amplifier CIR16474S CB9390E (CB9390E)

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

PUT LED Flasher (CB16934E)
This LED signaling circuit uses a programmable unijunction transistor (PUT) as a relaxation...
Tone decoder (CB13936E)
This decoder filter was found in a 1975 documentation. The integrated circuits can be 741. The...
5 minutes timer 555 (CB25993E)
We found this circuit in the January 1997 Electronics Now magazine. The triac determines the...