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.
In the figure we have three voltage doubler configurations that can be used in high and low...
In this application, from English documentation, we have the way to activate an AC load up to 10 W...
This 1-transistor reflex receiver was found in a 1963 publication. The coil is for the mid wave...