The setting of this power supply is only 0.1%. We found it in a 1969 US documentation. Transistors may be current equivalents. Note the use of symmetrical power supply.
We found this circuit in a 1969 General Electric documentation. The circuit uses transistors of the...
This circuit also detects leaks and rain. I found it in a 1967 English magazine, but it can be...
This circuit was obtained in a 1982 English magazine. It is a regulator for outputs between 1 and...