This circuit of starting lights for auto-race was found in an English documentation from the 80's. The LEDs must be of different colors, for greater realism.
We found this circuit in the February 1970 Radio Electronics magazine. It can be used in an analog...
This circuit was found in a Poptronics of the 90's. The FET is double-gate, and the frequency...
This flasher of two incandescent lamps was discovered in a 1983 documentation and it has two...