The circuit is from a Radio Electronics magazine from October 1987. The Triac must be equipped with a heatsink and the transistors are general purpose.
With this timer we can start between 30 seconds and one and a half seconds, time set in the pot....
Texas Instruments REF33x Voltage References can be obtained from Mouser Electronics. These small...
Found in an Electronics World of 1966 this circuit can be made with current power transistors. It causes...