High voltage switching power supply

Simple 555 timer based circuit is designed to be efficient and reliable.
Some of the points discussed is using a large value supply rail decoupling capacitor, damper diode to handle the negative going pulse and a flyback timing capacitor to control the positive going flyback pulse.

Category:

Science & Technology

Tags:

• High
• voltage
• switching
• power
• supply
• psu
• damper
• diode
• flyback

[Blodslav]

@quantumbits Ah I see thanks alot man!

[quantumbits]

@Blodslav The capacitor is not for the power supply 60 or 120 Hz ripple so much since that is probably already filtered. Instead the capacitor across the DC line helps absorb harmonics produced by the oscillator/driver itself. There are a lot of harmonic since the waveform is probably a square wave. Without the capacitor the circuit could interfere with itself (parasitic).

[quantumbits]

Nicely done. Simple yet effective circuit. Circuit description was interesting.

[SolutionByEvolution]

@Blodslav The capacitor is needed to decouple high frequencies from the supply...the battery may have awesome DC stability but is poor at higher frequencies due to parasitics (mainly inductance due to a battery's physical size). Also the wires leading to the board tend to contribute additional inductance. I often decouple with both electrolytic to capture low frequencies and a ceramic (0.1uf) to capture higher frequencies as part of good design practice.

[Blodslav]

Hey man so basically you're putting an electrolitic cap across your power supply? Do you need this even if you're running it with smooth dc from a battery? Also are you feeding the same voltage into your load as well as the chip? Im going with a voltage divider and a regulator to feed into the chip. Also, wouldnt it be possible to put 2 diodes across the load in a reverse bias to capture the feedback voltage in a capacitor and regulate it back into the power supply?

[benjwgarner]

@80927269 watch?v=xv_MS9nBZyw

[fuuturist]

Can you upload schematics?

[80927269]

Hi can you show me how is the diagram of driver that you used in this video, i like make this power supply, thanks you.

[hrvojevz]

Flyback driver... arc is about 20kV

[WolfVecho]

looks like a simplified pulse width modulator

cheers bloke hey if you raise your frequency

above an audible level you can then modulate music through the plasma arc it's pretty cool

something to play with ;)