How to Add a 12 Volt Circuit to Your Ender 3D Printer

Introduction: How to Add a 12 Volt Circuit to Your Ender 3D Printer

The Ender series of Creality 3D printers use 24 volts to power their electronics. If you want to install 12 Volt quiet fans or other 12 volt devices like a laser engraver, you need to create a 12 volt circuit. Some people use individual buck converters for each device, however I preferred to create a 12 volt 5 amp circuit that could power several peripherals with one connection.

Supplies

You will need a small 24V DC to 12V DC converter like this one on Amazon:

https://smile.amazon.com/gp/product/B01EFUHFDU/ref...

You may also use these solder heat shrink connectors found on Amazon:

https://smile.amazon.com/gp/product/B073RMRCC3/ref=ppx_yo_dt_b_asin_title_o08_s00?ie=UTF8&psc=1

Step 1: Connection

Simply open up the case of the control box on the Ender printer and connect the input wires for the DC-DC converter to the 24 volt input of the board. You can then make connections to multiple devices either by installing a terminal block or connecting the wires to the output with a solder heat shrink connector as I did in the photo.

Step 2: Mount the Converter

The converter does not fit in the tight space in the control box of the Ender 3, so I mounted it with a T-nut to the frame just behind the control box.

Step 3: Conclusion

This worked nicely to power 12 volt quiet fans for the case and hot end and a future laser engraver. One thing to explore would be putting the DC-DC converter in the PSU to also power a quieter 12 volt fan for the PSU. You could then run 12 volts out to the control box.

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    6 Comments

    0
    slicedpage
    slicedpage

    Question 2 months ago on Introduction

    I bought the sovol filament dryer which runs on 12v via a brick. Knowing I'd void its guarantee can I power it from my ender 3?

    0
    Jerryolsen
    Jerryolsen

    Answer 2 months ago

    Do you mean a 120v to 12v brick? I doubt it, it'll pull too much current. You could wire the input to the brick to mains input on the power supply.

    0
    DarylC55
    DarylC55

    Question 7 months ago

    I have a small problem I want to put a 12-volt 40watt laser on my homemade CNC the laser has 3 wires my problem is
    1)12v pos
    2)12v neg
    3)???? do I need to connect this wire if so what voltage and where. As I have a stand-alone controller I will need to control it
    Thanks in advance

    0
    nikovaljann
    nikovaljann

    Answer 2 months ago

    Hmm isn't that wire a pwm contact for activating the laser?? Yellow wire

    0
    Jerryolsen
    Jerryolsen

    Answer 7 months ago

    The third wire is to read the temperature and doesn't need to be connected.

    A separate lesson I learned is to always have air assist for your laser.

    0
    DarylC55
    DarylC55

    Reply 7 months ago

    thank you