TTL binary adder (CB22430E)

This circuit is based entirely on TTL gates. The circuit must be powered by a voltage of 5 V.

Flying Saucer Sound (CB16274E)
We do not know exactly what sound a flying saucer makes, or if it makes a sound! But this is not...
Power Pulsator (CB10590E)
This circuit was published in an English magazine from 1977, but it can be easily assembled since...
Speed control for car or model railroad (CB5417E)
This circuit for modeling was found in a 1980s documentation. The SCR can be the TIC106 and the...