TTL binary adder (CB22430E)

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

90V x 10 A Amplifier (CB8951E)
Based on National semiconductor power operational amplifiers, uncommon today, this circuit...
Siren LM339 and LM3080 (CB18915E)
The two integrated circuits used in this configuration can still be found. The frequencies of the...
Photo relay with LDR CIR23521S CB23821E (CB23821E)
I discovered this circuit in Radio Electronics magazine in 1962. The circuit drives a special...