PowerSupply. - Here is Circuit schematic Negative Voltage Power Supply using IC LM555. As we know that A negative supply can be generated by a “Charge-Pump” circuit created with a 555, diodes and capacitors.
Another advantage of this circuit is that, the negative voltage together with the original positive supply can be used to simulate a dual supply. This circuit diagram like in figure 1 below shows how to obtain a negative voltage from a positive voltage supply.
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| Figure 1. Circuit schematic Negative Voltage Power Supply using IC LM555 (Source: www.electronicecircuits.com) |
Component List
- C1 0.1µF (104)
- C2 0.022µF (223)
- C3 22µF 25V
- C4 33µF 25V
- C5 100µF 25V
- R1 4.7kΩ
- R2 33kΩ
- D1 1N4002
- D2 1N4002
- IC1 NE555
The Original Article : "555 Negative Voltage Power Supply"
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