This circuit is from a documentation about the MC1723, Motorola equivalent of the well-known 723. The transistor admits equivalent and must be mounted in a good heat sink.
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...