This circuit is from an old Japanese publication of 1962. The circuit uses two batteries, one for the filaments of the tubes and the other one of high voltage for the plate circuits.
Mouser Electronics is now shipping DA14585, a kit for the development of voice remote control...
This circuit found in Radio Electronics can be used in games to produce a random pulse train. The...
This circuit uses two light-activated SCRs or LASCRs, uncommon components today. The power depends on...