Linear Ohmmeter LM11 and TL431 (CB14548E)

We found this circuit in Motorola's Linear Databook in 1990. Integrated circuits are somewhat difficult to obtain today.

Two Power Loads by One Cable Control (CB19044E)
This interesting control circuit was found in an Electronics Now from 1988. Through it we can...
7 to 15 V protected regulator (CB8679E)
Found in a 1964 Electronic Design, this circuit must use transistors according to the supplied...
Pulse width modulator (CB8241E)
We found this circuit in a 90s Popular Electronics. The circuit can be implemented with modern...