With only two ultra fast recovery diode UF4004 with a few capacitors and an oscillator circuit, we can create a DC/DC voltage inverter. DC/DC inverter here, means creating a negative voltage output with the opposite to the source DC voltage.
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| A fully soldered and tested PCB |
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| Copper Side |
I use NE555 configured as an oscillator to create a square wave, pulsing the negative voltage inverter circuit.
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| Some NE555 in my components stock |
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| Device pin diagram from the Vendor TI |
The IC supplied with the voltage of +12 V. The negative voltage output created by the negative voltage inverter is nearly the same in magnitude of the source voltage but it's different in polarity.
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| Schematic |
Just like an electronics hobbyist, I did this stuff from scratch with any calculation. It excepts the circuit design, simulation and PCB design.
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Circuit Simulation. The output square wave from the oscillator is 30.25 uS period. The amplitude
of the signal is 5.50 V. The output negative voltage fail steadily to -12 V DC. |
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| Copper Side |
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| Top Silk |
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A Sample 3D Design
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| A Sample 3D Model |
Design file could be download here.
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