This circuit was found in a 1965 General Electric manual. What it does is give a warning if you leave the vehicle with the headlights on or lights inside.
This circuit is from a technical documentation from the 70s. It makes use of married transistors in a...
This strobe light circuit with incandescent lamp was found in a 1978 publication. We can mount it with...
This circuit produces a square wave signal with the frequency determinated by R1 and C1. The upper limit...