Address decoder using the 74LS138 (CB20537E)

This decoder circuit 3 of 8 was found in a publication for PCs from 1992. The circuits are TTL and must be powered with 5 V.

Controlled Oscillator 4011 (CB15774E)
This oscillator is enabled when a high level is applied to the control input. The operating...
Millivoltmeter with the 709 IC (CB24208E)
This circuit was found in the September 1972 issue of Radio Electronics magazine. The circuit uses...
Potentiometer remote control (CB8029E)
This circuit was obtained in a 1967 Raytheon manual. The company's component is an optical coupler with...