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.
This circuit was found in a documentation for radio amateurs from the year 70. Its purpose is to...
This circuit is from old documentation and can be assembled with 2N2646 for the unijunction and...
This circuit for tape recorders was found in the February 1990 Radio Electronics magazine. The...