This Nixie pipe circuit was found in 1965 documentation. Note the high supply voltage. Appropriate transistors of the time were used.
This interesting game was found in a 1987 publication, but it is very simple and can be easily...
This circuit mimics the trill of a bird. We found it in an American documentation from the 90s. It is...
The 4093 or any other NAND gate can be used for the very sensitive configuration of a R-S...