Schematics > Power > Voltage Inverter
Voltage InverterThis 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
Parts
| 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 |
|
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.
Title: Voltage Inverter
Source: www.aaroncake.net
Published on: 2005-02-03
Reads: 735
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