Digital recorder ISD1016 (CB7963E)

Found in a Popular Electronics from the 90s, this digital recording circuit uses an unusual integrated circuit today.

Alarm for parallel sensors (CB6416E)
This circuit was obtained from a Popular Electronics of the 90s. The SCR is of any type and the...
TPS56C215 SWIFT Converter Step Down (COM025E)
June 2016 – Mouser Electronics already have in stock the TPS56C215 converter from Texas...
Automotive Burglar Alarm (CB4870E)
We found this circuit in an old American documentation. The circuit is simple by making use of an...