Voltage Inverter II
Electronic Schematics > Power > Voltage Inverter II

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.


This is the schematic of the Voltage Inverter


Part Total Qty. Description Substitutions
R1 1 1M Linear Pot  
C1,C2 2 15uf 25V Electrolytic Capacitor  
U1 1 LM380 Audio Amp Chip  
MISC 1 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).

Title: Voltage Inverter II
electronic circuit
Source: www.aaroncake.net
Published on: 2005-02-03
Reads: 1373
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