Tuesday, September 21, 2010

Variable Dual Power Supply for your Experiments

This power supply provides variable positive and negative DC voltage for your experiments. It is based on LM317 (positive voltage regulator) and LM337 (negative voltage regulator) ICs.
 Source: http://sound.westhost.com/project44.htm
The diodes D5 and D6 are to protect external reverse polarities, and VR1A and VR1B (each 2K) are potentiometers to control the output voltages.


D H said...

If I were to add analogue meters to measure the output voltages how would the polarity of these meters be wired into this circuit?

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