Powering LEDs off the MK4 power supply  

RE: Powering LEDs off the MK4 power supply

There should be plenty of headroom for LEDs. I've been using two 24V led strips on my 2 MK3s for a while, and now the same with my MK4 with no problem.

Tap directly off of the power supply or the "POWER IN" on the buddy board. Avoid tapping from the "HEATBED IN". The heat bed draws a lot of current, and there is a voltage drop across the wires supplying it, which will cause your LEDs to flicker if you power them from those terminals.

RE: Powering LEDs off the MK4 power supply

I’m interested in doing something like this. Where did you place the LEDs and how did you mount them?

RE: Powering LEDs off the MK4 power supply

I used the two light versions of these:

• https://www.printables.com/model/3267-led-light-bar-prusa-i3-mk2mk3
• https://www.printables.com/model/493459-led-light-bar-prusa-mk4

They are really great models. My only complaint is that on the MK4, the rear light bar is closer to the frame than I'd like, making it more difficult to carry the printer by the top of the frame and preventing the use of alternate spool holders that take up more space.

RE: Powering LEDs off the MK4 power supply

Thanks for the info.

RE: Powering LEDs off the MK4 power supply

I make this one for my MK4 and plug a 24V led strip directly on the PSU without any problem.

https://www.printables.com/model/548924-led-strip-channel-with-diffusers-include-corner-jo

RE:

This is how I’ve done it:

https://www.printables.com/model/484200-power-distribution-for-prusa-enclosure

https://www.printables.com/model/485262-led-light-bar-for-prusa-enclosure

So I’m running the 12v LEDs & 5v power to a raspberry pi, and the PSU is fine.

This is how I did it prior to upgrading to Mk4 / Prusa Enclosure:

https://www.printables.com/model/55784-prusa-i3-mk3-mk3s-lightbar-for-generic-8mm-led-str

RE:

I did it a little different because I don't like anything sticking out of the front of my printer. If I need some light directly on the nozzle then I have an extra strong LED next to the camera controlled by software. I used 24V LED strip and a 16x9.3mm aluminium profile to get rid of heat, a plastic profile is generally a bad idea because a bright LEDs get a bit hot after some time. BTW, the whole thing requires a minimum of plastic, it is powered directly from the printer, fits mk3s/+ and mk4 frame, also fits with mmu2s unit. Here are the files you can use: https://www.printables.com/pl/model/619904-mk3s-mk4-led-light/files

RE: Powering LEDs off the MK4 power supply

I actually solved the problem with an almost metal-free solution: https://www.printables.com/model/619620-magnetic-modular-led-strip-for-the-prusa-enclosure

I had the lights running for 20 hours straight since yesterday, and they did not become warm at all. At least with the type of strip I used, there really are no thermal problems, I'd dare to say.

RE: Powering LEDs off the MK4 power supply

Thanks to all for posting, I appreciate all the great info.

RE: Powering LEDs off the MK4 power supply

does anyone know if there are auxiliary contacts on the MK4? there are a number of adds ones, like LEDs, that I want to install, and have them power up when the printer goes active using prusa link remotely.  With a set of contacts, I can do what ever I want with relays, PS, and external equipment.