This charger for small batteries was obtained from the 1982 Radio Experimenter Handbook. The circuit is low current.
A Reset-Set flop-flop capable of directly controlling a relay or other power load can be...
Another alternate action switch that uses a NAND Schmitt Gate [4093 IC] is shown here. The...
We found this speed control for miniature cars in an American publication from the 70s. With...