Voltage Inverter
Electronic Schematics > Power > Voltage Inverter

This simple circuit is a good solution to the powering a dual supply op amp from a single battery problem. The circuit simply takes a positive voltage and inverts it. It uses only one 555 timer and a few other passive components, so it doesn't add much in the way of size and cost to a project.


This is the schematic of the Voltage Inverter


Part Total Qty. Description Substitutions
R1 1 24K 1/4 Watt Resistor  
R2 1 56K 1/4 Watt Resistor  
C1 1 3300pF 25V Ceramic Capacitor  
C2 1 47uF 25V Electrolytic Capacitor  
C3 1 10uF 25V Electrolytic Capacitor  
D1, D2 2 1N4148 Silicon Diode  
U1 1 555 Timer  
MISC 1 Wire, Board  


1. V+ can be anywhere from 4 to 16V. -V is one volt less than V+. So for -12V output, use +13V input. The maximum current output of the circuit is about 280mA, more than enough for a few op amps.

2. For better regulation, a 79LOxx series regulator can be used.

3. A zener diode may also be used to regualte the output voltage.

Title: Voltage Inverter
electronic circuit
Source: www.aaroncake.net
Published on: 2005-02-03
Reads: 1605
Print version: Print version

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