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Thread: SSR or Mosfet
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01-05-2016, 11:50 AM #1
SSR or Mosfet
I have a Geeetech Prusa i3 x and was wondering if and how anyone else has ran their heatbed off of an external 12 or 24v power supply. From what I been reading, I think whatever you use you have to use a diode for backfeed but I was wondering which one would be more reliable and work the best. Thanks guys
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01-05-2016, 02:14 PM #2
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01-05-2016, 07:15 PM #3
Typically, the mechanical relays with an electromagnet need a reverse biased diode across the relays coil. That is because when the current is switched off to the relay's coil, you get a big inductive kick that can fry the circuitry driving the coil. That is the only time a diode is required as far as I know. And a you wouldn't need that with a solid state relay because there is no coil. Maybe the Solid State Relays need a diode for another reason?
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01-06-2016, 03:18 AM #4
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New member with print issue
06-11-2024, 08:57 AM in Tips, Tricks and Tech Help