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.
Found in a 90s Popular Electronics, this circuit uses a simple 9 V source. The power can be used...
Originally the circuit in the figure is indicated by National for the control of an electronic car injection...
This simple receiver that works with only 1.5 V, was found in a 1987 documentation. The integrated...