4060 XTAL Oscillator (CB22401E)

We found this oscillator in an old documentation. The crystal frequency can be different to get other output frequencies.

Economic inverter (CB7178E)
This circuit with 117 V output was found in a 1969 Electronic Design. Drive transistors admit...
Inverter For Fluorescent (CB10247E)
This project came out in an article of mine (Newton C. Braga) in the Popular Electronics magazine of...
Li Ion battery charger (CB9124E)
Found in an Electronic Design from the 80s, this single cell charger uses an integrated circuit...