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Controlling 12V battery output to heating element

MJC417

Mar 8, 2018
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Mar 8, 2018
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I wired a diesel glow plug to a 12V battery for a tool I'm building. Its very simple but I would like to control the output of the battery so the plug doesn't heat up as much. It doesn't have to be a fine control, anything crude will do. Is this possible without destroying the battery? Glow plugs are tough, no problem there. Any ideas for a simple controller? Thanks, Mike
 

Tha fios agaibh

Aug 11, 2014
2,252
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Aug 11, 2014
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2,252
You could probably use an off the shelf DC motor speed controller, or build your own circuit using a NE555 timer to drive a mosfet by pwm.
 

MJC417

Mar 8, 2018
3
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Mar 8, 2018
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Glow plugs draw about 10 amps (AC Delco 60G). Sure, I'll give a motor speed a controller a try.
 

WHONOES

May 20, 2017
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If you want to try and build your own controller, you could try the attached circuit for a very simple 555 pwm controller. A version of it has appeared elsewhere on this forum. The transistor will need to be mounted to a small heat sink.
 

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  • 555 PWM 4.pdf
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MJC417

Mar 8, 2018
3
Joined
Mar 8, 2018
Messages
3
Excellent, thank you. I may have an old 12v fan I can pull a pwm out of.
 
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