ANYCUBIC MEGA ZERO HEATED BED FIRMWARE AND UPGRADE PROJECT

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Make sure to watch my YouTube videos and download + read the "read me" file carefully. By following this guide, you acknowledge that you 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 support heated beds. The hardware can support it, but there is no MOSFET on the board, and you wouldn't want to power a bed with the power brick supplied with the machine. The board has 2 pins that output 5V when the bed is enabled - these should be able to drive the Anycubic / Trigorilla MOSFET to power the bed with an additional power supply. See my YouTube video for more information. https://www.youtube.com/watch?v=sJeAniMir0c&t=48s I will share the firmware and read me notes now, along with 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 allow 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 5-24V. I was worried about the voltage being too low, so I soldered in a voltage booster and set it to output 6.5 volts - The MOSFET should arrive tomorrow. I have the heated bed installed - I'm using an Anycubic Ultrabase and laser-cut some adapter plates to mount it on the stock X carriage. I was able to get away with only raising the Z-axis limit switch all the way up and then tightening down the bed about 75% of the way, which 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 Update #2 for 4/21/20 - It Works! 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, and 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