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 Home Heating
 Anyone ever try to use transistor as heater?
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sucahyo
Average Member


Indonesia
246 Posts

Posted - December 06 2013 :  22:03:17  Show Profile  Visit sucahyo's Homepage Send sucahyo a Private Message  Reply with Quote
Just a suggestion because isn't it amazing how the a radiant charger transistor can be as hot as ironing when it only consume 12 watt?

To make the transistor heat up more, we use load and increase the "turn off" time as much as possible.

Or you can try my stingo with out load. Make only one coil, without diode for the charging part. You use the potentiometer as heat control.
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Edited by - sucahyo on December 06 2013 22:09:20

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olddawgsrule
Advanced Member



USA
1434 Posts

Posted - December 07 2013 :  08:01:11  Show Profile  Visit olddawgsrule's Homepage Send olddawgsrule a Private Message  Reply with Quote
SC, I've wondered this myself..

I've made a few circuits that ran fairly well for it's purpose, just over-heated.
Over-heating being a waste of energy, or could it have been used differently..



Old in age, not in mind, so
'Teach me something new'!

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sucahyo
Average Member



Indonesia
246 Posts

Posted - December 07 2013 :  12:03:37  Show Profile  Visit sucahyo's Homepage Send sucahyo a Private Message  Reply with Quote
Yes.

Have you ever heard Robert Adam? He found that the heat do not manifest in the transistor, but at some space around the transistor. He found excess energy in form of heat. So his first application is water heater. With water surround the transistor. But I forget the exact.
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Anothercoilgun
Junior Member



140 Posts

Posted - December 08 2013 :  14:38:12  Show Profile Send Anothercoilgun a Private Message  Reply with Quote
12 watts is a lot for a small object especially with no heat sink for dissipation. A transistor will only consume a fraction of the power delivered and still get to high heat. Only takes 1 or 2 watts to reach smoking temperatures. Has nothing to do with transistor, any similarly small volume object can reach pass 400F under a few watts.

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olddawgsrule
Advanced Member



USA
1434 Posts

Posted - December 08 2013 :  15:22:17  Show Profile  Visit olddawgsrule's Homepage Send olddawgsrule a Private Message  Reply with Quote
That's the question!
A few watts of power and how much heat?

And be doing something else productive...

Sorry AC, my mind just goes towards heat this time of year..
And I get back into circuitry that failed because of..

I just wonder what we've done and made happen and fixed because of over-heating, when it just may have severed another purpose and did what we hoped?



quote:
Originally posted by Anothercoilgun

12 watts is a lot for a small object especially with no heat sink for dissipation. A transistor will only consume a fraction of the power delivered and still get to high heat. Only takes 1 or 2 watts to reach smoking temperatures. Has nothing to do with transistor, any similarly small volume object can reach pass 400F under a few watts.

OLD Boy's %@+$!~^ Bench :)



Old in age, not in mind, so
'Teach me something new'!

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sucahyo
Average Member



Indonesia
246 Posts

Posted - December 08 2013 :  21:11:02  Show Profile  Visit sucahyo's Homepage Send sucahyo a Private Message  Reply with Quote
Yes, size may have been the factor. But I think 12 watt hour is cheaper than a candle. And 12watt hour may make a can container heat up more than a candel.

For how much, if I run my stingo at full power at 12V, without load, consume under 1Amp, the heatsink will be untouchable hot under a minute.

With transistor heating, I think the problem is how to efficiently spread the heat because most of the heat come from only very tiny surface. Maybe with computer heatsink, the one with copper plate.

I would also submerge the coil in water or oil because the coil will surely heat up too. May be it is easier to just to submerge the whole circuit into the oil.

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Edited by - sucahyo on December 08 2013 21:13:33
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