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Old 04-15-2012, 11:30 AM   #1
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Default Soldering pencil on a triac

I'm doing a test that requires a 30W soldering pencil on a rheostat. I got a bunch of triac dimmers around here and my pea brain tells me a resistive load is a resistive load and I should be fine. Correct?

Thanks
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Old 04-15-2012, 12:08 PM   #2
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It will work fine for a 30W load. For heavier loads, you'd probably want to look into a variac.
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Old 04-15-2012, 12:21 PM   #3
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A pencil type soldering iron is a resistive load, so just about any type of voltage reducing device will work.

A gun type is inductive. That's a different story.
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Old 04-15-2012, 12:38 PM   #4
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Originally Posted by micromind View Post

A gun type is inductive.
Did not know that.
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Old 04-15-2012, 02:14 PM   #5
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Quote:
Originally Posted by Chris Kennedy View Post
I'm doing a test that requires a 30W soldering pencil on a rheostat. I got a bunch of triac dimmers around here and my pea brain tells me a resistive load is a resistive load and I should be fine. Correct?

Thanks
Perfect application
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Old 04-15-2012, 03:46 PM   #6
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Perfect application
Yup, just completed the test. I was able to slowly take the pencil from 26C to 180C in 1hr.

Thanks all.




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Old 04-15-2012, 03:56 PM   #7
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For what little they cost, why in the world would anyone put a soldering unit on a dimmer for a permanent application??????????????
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Old 04-15-2012, 03:58 PM   #8
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For what little they cost, why in the world would anyone put a soldering unit on a dimmer for a permanent application??????????????
Just a test Brad, I labeled the box do not use, test only.
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Old 04-15-2012, 04:04 PM   #9
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Quote:
Originally Posted by Chris Kennedy View Post
Just a test Brad, I labeled the box do not use, test only.

WHOOPS!!!! Gotcha Chris! Sorry man......
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Old 04-15-2012, 05:36 PM   #10
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Quote:
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Yup, just completed the test. I was able to slowly take the pencil from 26C to 180C in 1hr.

Thanks all.




Now you can use a 300W iron and solder everything from transistors to Knob & Tube taps
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Old 04-15-2012, 07:42 PM   #11
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I have a 30 watt 12 volt pencil type soldering iron that's connected to a 12 volt DC power supply, a 3055 transistor and a potentiometer to control the wattage.

For very small connections, the full 30 watts is too hot.
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Old 04-15-2012, 07:51 PM   #12
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Quote:
Originally Posted by micromind View Post
I have a 30 watt 12 volt pencil type soldering iron that's connected to a 12 volt DC power supply, a 3055 transistor and a potentiometer to control the wattage.

For very small connections, the full 30 watts is too hot.
Is it something you designed or store bought?
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Old 04-15-2012, 07:54 PM   #13
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Originally Posted by Semi-Ret Electrician View Post
Is it something you designed or store bought?
Home built, including the power supply.

Really simple though.
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