This flasher circuit consists of an astable multivibrator with the frequencies given by the capacitors. The circuit is from 1965 using light bulbs, but LEDs can be used. Power comes from 4 batteries.
The speed indication of this circuit is made on an analog instrument. The circuit is used to count...
This circuit was obtained in a 1967 Raytheon manual. The company's component is an optical coupler with...
We found this circuit in a 1960 Sylvania transistor manual. The relay can be 12 V and C1...