Voltage Inverter


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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.

Schematic

This is the schematic of the Voltage Inverter

Parts

Part
Total Qty.
Description
Substitutions
R1124K 1/4 Watt Resistor
R2156K 1/4 Watt Resistor
C113300pF 25V Ceramic Capacitor
C2147uF 25V Electrolytic Capacitor
C3110uF 25V Electrolytic Capacitor
C41100uF 25V Electrolytic Capacitor
D1, D221N4148 Silicon Diode
U11555 Timer
MISC1Wire, Board

Notes

  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.
  4. Thanks to audioguru for correcting some errors in the original schematic. Read about it in this forum topic.

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Comments

Liston of University of Cebu Computer Engineering Dept.(Philippines)
Voltage Inverter(explain)
Monday, August 04, 2008 4:41:28 AM
IC 555 there is only used for oscillation, to have an AC current and the output is connected to transformer to have a higher voltage.
saula
Voltage Inverter
Tuesday, April 08, 2008 8:07:13 AM
The circuit diagram shown above,there was was transformer. how will it work or pls,help me to illustrate it perfect connection.
aravindh
Voltage Inverter
Sunday, March 16, 2008 11:34:18 AM
Hi all! Can anyone explain the working of the voltage inverter using 555 timer?? I jus' couldn't understand it.(Hey guyz! I m an average student!!)
anonymous
Voltage Inverter
Saturday, January 26, 2008 11:03:10 AM
hello how are you my man my problem i do have an electrical appliance that needs to be feed with 220 ac 6000w but i want to use any invertor suppled by 12v/24/ dc give the sizes,diagram,components.
Syed Zubair H. Shah
Voltage Inverter
Sunday, October 28, 2007 8:21:06 AM
Very simple and nice circuit
anonymous
Power Inverter
Wednesday, September 26, 2007 5:29:28 PM
IF YOU CAN HELP ME I NEED CIRCUIT FOR INVERTER USED IN MOSFET TRANSISTOR AND WITH PWM AND THE POWER OF INVERTER IS800W
sridhar pradhan
Voltage Inverter
Thursday, September 13, 2007 3:29:41 AM
HERE THE INPUT VOLTAGE IS NOT SPECIFIED. PLEASE GIVE ME OUT PUT OF 230 VOLT AC.
saurabh jain
Voltage Inverter
Monday, September 03, 2007 2:35:17 AM
plzz give some working of the voltage inverter.... also the wht when input go beyond the limitation...
wuselchen
Voltage Inverter
Saturday, September 01, 2007 7:47:13 AM
If you use the bipolar version (LM555, NE555) of the 555, you always have to connect a C of 10n - 100n from pin 5 to ground to stabilize the control voltage of the threshold comparator! @Steve: your inverter.jpg is not retrievable, since the site asks for your password!
Dan
Power Inverter
Monday, August 20, 2007 11:48:13 AM
I found out this site couple of weeks and found out that it was useful because it contained the things i need in electronics. THanks sir for this.
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