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.
Schematic
Parts
| 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 |
Notes
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: 1388
Print version: 
Other electronic circuits and schematics from Power
-
Fuse Monitor / Alarm
-
Self switching Power Supply
-
Dual Polarity Power Supply
-
2W Switching Power Supply
-
High and Low Voltage Cutout with delay and Music
-
AC Current Monitor
-
6V to 12V Converter
-
Power-On Time Delay Relay
-
Ultra low drop linear voltage regulator
-
500W low cost 12V to 220V inverter