Position: Index > Inverter Circuit >

How to build Voltage Inverter II

2014-12-19 01:30  
Declaration:We aim to transmit more information by carrying articles . We will delete it soon, if we are involved in the problems of article content ,copyright or other problems.


This simple and inexpensive circuit can produce a dual (positive and negative) voltage from a single supply input. It is therefore extremely useful for powering opamp and other circuits that require a dual voltage from a single battery. The circuit will operate at an input voltage from around 5V to 20V and produce a output from -2.5V to -10V.

Circuit diagram

Voltage Inverter II-Circuit diagram


R1 1M Linear PotC1,C2 15uf 25V Electrolytic CapacitorU1 LM380 Audio Amp ChipMISC Heatsink For U1, Binding Posts (For Input/Output), Wire, Board


1. U1 dissipates around 1W and will therefore require a heatsink.2. R1 is used to equalize the outputs. The first time you use the circuit, it should be set to mid range and then adjusted with the aid of a voltmeter. Measure each output while adjusting. The circuit is calibrated when both outputs read the same voltage (either positive or negative).

Reprinted Url Of This Article: