Found in 90s Popular Electronics, this circuit uses common general-purpose transistors in a configuration that has been extensively explored on this site and in our articles.
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...