Found in an EEE from 1970, this circuit supplies a voltage of 12 V DC x 10 mA current from the power grid. The NOR or NAND port used is TTL.
An interesting circuit suggested to indicate when a device is turned off. In the figure we have...
This electronic defense generates a high voltage discharge capable of intimidating an attacker. The...
) This circuit was obtained in 1965 General Electric documentation. SCRs can be modern common...