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Following on from What level of voltage does the Creality Ender-3 run at?

Dave's answer states that both 12 V and 24 V can be used on the controller board. It also goes on to say that the controller board is used in both configurations in two different printers:

  • Ender 3 and;
  • CR-10

I would like to know how this dual voltage operation works:

  • Does it use both voltages at the same time, or either one or the other?
  • Are there two different electrical inlets or are they the same?
  • Does it auto-detect or are there jumpers used to configure or are the components tolerant to both voltage levels?

Also related:

  • What is the board used?
  • Is the board a proprietary design or a standard third party board?
  • Does anyone have any photos of the board and/or schematics?

1 Answer 1

This answer addresses the input voltage. If you look up the official replacement board at the official Creality store the board features a single pair of connectors next to it says: 12 V / 24 V. So you can either use 12 V, or 24 V, not both. An internal regulator will most probably reduce the voltage anyways.

Detail of the replacement board, single 12/24 V power connector is encircled

Please note that (kindly reminded by user profesor79 through the comments) that the microprocessor on these boards only use 5 V. So any voltage you supply (12 or 24 V), the voltage regulator will always make sure the microprocessor does not get more than 5 V. However, that does not necessarily apply to all peripherals connected to the board! This should be verified if for the peripherals also a voltage regulator is used. One of my own boards, the RUMBA board can be fed by any voltage ranging from 12 V - 35 V, but this also applies to the peripherals like the heater cartridge and the fans! I use the RUMBA with a 24 V power supply, so I need to use 24 V fans heater elements and heat bed.