CLIVE TAYLOR

This module... takes +-5.25 v and using the TL431 regulators gives the ability to set both +- to exactly the same voltage..
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Home >Electronics Discussions >General Electronics >TL431 Voltage regulator.
not on a pcb but strip board. output 100mA max, but by adding transistors it is possible to use more current...

Falstad circuit showing how to set up dual rail ...eg pos and neg voltages for op amp.
use open file in the applet to use this file. and change the resistance to alter the voltage and trigger the led via a transistor.