This TTL circuit found in the September 1996 issue of Electronics Now magazine doubles the frequency of a rectangular signal. The power supply must be 5 V.
The CK722 transistor used in this circuit is one of the first commercial types in the world. The...
This automatic dimmer for incandescent lamps was found in a European publication from the 1980s. The...
This traditional doubler configuration with the 555 can be found in other articles on the author’s site....