Currently I’m working on a device to electrocute home insects like cockroaches, progress is small because they are smarter than I thought, but that’s a different story. For that project I had to find a source of sufficient high voltage and output power. Presented in previous post 5V/400V converter had insufficient voltage and power, another option, flyback transformer was too dangerous to be used here.
Finally, I have made a new high voltage supply based on an inverter transformer and voltage doubler. It seems to be ok for this job, but it can be used in various other applications so I’m presenting it in a separate entry.
Warning! the device produces high voltage that can be lethal, if you want to build it, please take cautions
A square generator is made from IC1A and IC1B, frequency depends on C1, R3, R4, pulse width depends on an R3 and R4 ratio. The signal is buffered by using IC1C and IC1D. Voltage doubler is made from C9, C10, D4, D5.
Output voltage = 1kV is at frequency around 11-14kHz, to minimize power consumption, I decided reduce output voltage to around 850V, this is equivalent to 5kHz from the generator.
If nothing is connected to the output, then even after power was turned off, C9, C10 can store enough power to provide unpleasant shock. To protect against that, discharge resistor R5 was added. C9 doesn’t have one, so it keeps a high charge even after the device was powered off.
For more detail: 9V/1kV DC/DC converter
About The Author
Ibrar Ayyub
I am an experienced technical writer with a Master's degree in computer science from BZU Multan University. I have written for various industries, mainly home automation, and engineering. I have a clear and simple writing style and am skilled in using infographics and diagrams. I am a great researcher and is able to present information in a well-organized and logical manner.