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?
@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 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).
Nicely done. Simple yet effective circuit. Circuit description was interesting.
quantumbits 1 year ago
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?
Blodslav 1 year ago
@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.
SolutionByEvolution 1 year ago
@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 1 year ago
@quantumbits Ah I see thanks alot man!
Blodslav 1 year ago
Can you upload schematics?
fuuturist 1 year ago
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.
80927269 2 years ago
@80927269 watch?v=xv_MS9nBZyw
benjwgarner 1 year ago
Flyback driver... arc is about 20kV
hrvojevz 2 years ago
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 ;)
WolfVecho 3 years ago
Well, I don't like your shaky camerawork but you're doing a good job explaining the circuit. How about some stars ;)
hboy007 3 years ago