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.
We found this circuit in a 1969 Popular Electronics. It measures the heartbeat by changing the...
A modulated (flashing) siren using the four gates of the 4001 integrated is shown in the figure....
This reverb effect was found in the December 1961 Radio Electronics magazine. It makes use of...