ANYCUBIC MEGA ZERO HEATED BED FIRMWARE AND UPGRADE PROJECT

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Make sure to watch the youtube videos and download + read the "read me" file. By following this guide you agree to accept all responsibility and liability for any outcome caused or created by modifying your 3d printer. PREFACE: I was able to obtain the source code from Anycubic and have modified it to accept heated bed. The hardware can support it but there is no mosfet on the board, also you would not want to power a bed with the power brick supplied with the machine. The board has 2 pins that put out 5v when the bed is enabled - these should be able to drive the anycubic / trigorilla mosfett to power the bed with an additional power supply. See my youtube video for more info. https://www.youtube.com/watch?v=sJeAniMir0c&t=48s I will share the firmware and read me notes now. I will also add on stl files for the mosfet box and power supply box as well as a few ways to adapt a heated bed. Update: I designed and laser cut a pair of Y carriage adapters that allows a standard i3 size heat bed (190mm x 190mm mounting holes) to mount. 4/19/20 Update I soldered the wires to the 5v output on the stock board but it really only puts out about 4.8v. The trigorilla / anycubic mosfet works on a range of 5 - 24 v I was worried about the voltage being too low so I soldered in a voltage booster and have it set to output 6.5volts - The mosfet should arrive tomorrow. I have the heated bed installed - I am using an anycubic ultrabase and I laser cut some adapter plates to be able to mount it on the stock x carriage. I was able to get away with only having to raise the Z axis limit switch all the way up and then I had to tighten down the bed about 75% of the way. This let me level the bed without any additional modifications. There is no room for the stock bed adjustment knobs. You would need knobs about 1" OD or smaller. Update 4/21/20. Upgrade video part 1.1 Technical details. https://youtu.be/EQJLe1VbFTg < Video #1.1 Update #2 for 4/21/20 - It Verks! Amazon lost my mosfet but my backup order for a fysetc Mosfet arrived. The heated bed is working as planned in my Video #1.1 (^ link above) Next video will cover the finished install but the answer is YES you can control a heated bed with the stock control board if you modify it by soldering some wires to it. Edit: 4/22/20 - Fysetc Mini Mosfet works and was my backup since amazon lost the trigorilla mosfet. I designed a new box to house both the inline voltage booster and fysetc mini mosfet, STL uploaded. Requires 7) M3 x 5mm brass inserts, 7) M3 x 6mm screws. 2) M5 x 20mm flat head screws and 2) M5 post assembly T nuts. Notes - An inline voltage booster was used to increase output voltage from the board signal wires to 6.5v from the 4.8v i was getting. I wanted to ensure no issues with the 5-24v requirement of the mosfet. Video Part 2 - It works! https://youtu.be/uK9FaJobUXA