Using LM3909 integrated circuits, this circuit was found in an American documentation from the 90's. The frequencies can be changed by changing the capacitors.
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...