| Pages:
1
2
3 |
toxin
Harmless
Posts: 27
Registered: 12-8-2005
Member Is Offline
Mood: No Mood
|
|
I don't trust using power directly from a wall outlet to produce a spark, is there anything wrong with poducing a spark for this furnace from
something with a lower current yet high voltage like a stun gun powered from a salvaged computer power supply ?
|
|
|
12AX7
Post Harlot
Posts: 4803
Registered: 8-3-2005
Location: oscillating
Member Is Offline
Mood: informative
|
|
It's not a spark, it's an arc. You want high current because well, high voltage sucks.
A stun gun especially. That has single pulses of limited energy. You need continuous power. Nothing a computer supply is capable of producing,
either. More than four times that.
Tim
|
|
|
chromium
Hazard to Others
Posts: 284
Registered: 27-6-2005
Member Is Offline
Mood: reactive
|
|
I once played with computer PSU connecting two graphite rods to 12V and gnd. This rail was rated to 8A at 12V and after some unsuccesfull atempts i
was able to produce microscopic arc. I rubbed gently graphite rods with each other and sometimes there emerged small unstable arc. It was seen as very
bright point of light and rods got hot almost immediately. Normally I managed to hold this arc 10 sec or less but in some cases it burned more than 1
min continously.
Such small and unstable arc has no practical value in my opinion but it was quite a fun to play with.
|
|
|
a_bab
Hazard to Others
Posts: 458
Registered: 15-9-2002
Member Is Offline
Mood: Angry !!!!!111111...2?!
|
|
I have a way of producing a low powered arc easy enough, with two 110/220v transformers. I'll put the plan soon.
I discovered it by mistake, and you can create and sustain an 5 mm to 1 cm arc for as long as you want. You don't need carbon electrods either; it'll
form from metal electrodes aswell. Not good for welding though, due to the low power.
|
|
|
12AX7
Post Harlot
Posts: 4803
Registered: 8-3-2005
Location: oscillating
Member Is Offline
Mood: informative
|
|
Oh yeah, heh, I was messing with my induction heater project one day, testing with a load resistor- on accident I loaded it across the power supply
rails and got a handsome arc. This was +200VDC and a 50 ohm wirewound resistor, so around 4A flowing = 800W, until the resistor heats up and the
value drifts anyway (depending on the tempco of the metal used for the resistor).
Beautiful arc, reasonably thick at 4A, good length about 1/8 or was it 1/4", hissing since it's a filtered DC supply, only popping when struck or
broke. 
Tim
|
|
|
Texium
|
Thread Moved
19-11-2023 at 11:08 |
| Pages:
1
2
3 |
![[*]](images/xpblue/default_icon.gif){kind=icon}
