This circuit is from Motorola's Linear Interface ICs from 1993. The MC1723 is the equivalent of the well-known 723. The transistor supports equivalents.
The sensor for this Intersil circuit (1983 databook) is a common silicon transistor. The trimpot...
This circuit is from a 1972 Motorola publication. The used transistor can still be found, but it...
This is the simplest setting for lighting an LED. The circuit is from old English documentation that got...