The integrated circuit used in this old configuration is not common today. In it we have the way to control two SCRs in a control circuit connected to the AC network.
This egg timer has been found in an English magazine that no longer exists in 1982. The...
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
Found in Popular Electronics from the 1980s, this circuit uses two operational amplifiers from...