The circuit is from the manual of the integrated circuit used in the excitation of power transistors. The 30 V symmetrical supply should have a few amps of capacity.
This variable voltage reference uses a Norton operational amplifier. The voltage is adjusted at...
This low power, low voltage circuit was found in old General Electric documentation. Transistors may...
This flip-flop is triggered by touch and uses as a base a CMOS integrated circuit of type 4093....