Posted: Sun Nov 23, 2014 12:56 pm Post subject: Negative Voltage Generator
I needed a negative voltage for a LCD display so I went looking but did not find a suitable circuit so I made my own.
I used a NE555 to create a 160Khz signal to drive a transistor to switch power on/off to an inductor
The back EMF of the inductor is able to create 30volts or more from 5volt supply
The 180 ohm resistor sets the current through the inductor and how many volts the output is
The diode should be a signal or schottky type.
The .zip is a pdf file of the circuit
Regards Paul
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