Simple 12V to 400V boost converter

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nuclearrambo

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I never had a chance to experiment with boost converters, so I went on and made a very simple open loop boost converter which can convert 12V to 400V (or more).

I used Arduino to generate PWM (you can use any other source of PWM).

So here you go, the pictures and the circuit.

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If you want the circuit with 555 timer, here you go

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I am planning to use this for my upcoming coil gun project, where I would need this to charge a capacitor bank.

You can also check a small blog post where I have explained it's working.
https://nuclearrambo.com/wordpress/very-simple-high-voltage-converter-boost-converter/
 
Well, at the load I have attached a capacitor of 100uF and its drawing 2A at the time when I turn it ON and then becomes constant at 800mA once the capacitor is charged. I hope that is what you were asking
 
As I've written on your blog:
Thank you so much. I’ve realized your circuit with a feedback to stabilize the voltage output and now I’ve 400V from 5V.
The global quiescent current (considering pro mini too) is about 10-15mA.
I’ve used 6 diodes in series 1n4148, 2 capacitors in parallel of 10nF @ 1kV, inductor of 220uH, and a capacitor of 1000uF between 5V and GND to stabilize the circuit
 

brother can you explain how did you menage to get the feedback to stabilize voltage output? i guess you need a voltage divider from the output diode to some pin of the 555 timer, can you post schematic pleasE? king regards
 
Archeological thread.

Anyway information for any future necro-threaders;
The OP’s circuit has no feedback, its output voltage will change all over the place with load and source changes.
 
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