This simple timer for incandescent lamps or other non-electronic charges uses a triac as a control element. The triac must be mounted on a heatsink and the time obtained depends on capacitor C2.
Found in a 90s Linear Technology document, this circuit uses components from that time. The...
One pulse in the output is produce at each 5 pulses applied to the input. The circuit uses CMOS...
This control for 12 V drills was found in a 90s Elektor. The components are current, and Q1 can be...