Prusa i3 MK3.3 (S+)

prusaprinters

People asked me if it's possible so here you are. If you don't understand something here then buy MK3.5 upgrade instead.Cheap (but not easy) unofficial upgrade of i3 MK3(S(+)) to MK3.3.Advantagesfaster print (input shaping)graphical display (print preview etc.)LAN/WiFi + Prusa connectioncheaper than MK3.5 upgradeDisadvantagesno MMUmechanical and electrical work to doRequirementsPrusa i3 MK3(S(+))Prusa MINI displayhttps://www.prusa3d.com/product/lcd-panel-orange-assembly/https://www.aliexpress.com/item/4000935330217.htmlPrusa MINI mainboard (break the appendix if it's an original (not China) mainboard)https://www.prusa3d.com/product/buddy-control-board/https://www.aliexpress.com/item/4000935330217.htmlPrusa MINI power supply (or cable with connector only)https://www.prusa3d.com/product/external-psu-24v-150w/https://www.aliexpress.com/item/1005001458048658.htmlsolid state relay (SSR) / MOSFET for 24 V (or more) DC on both sides and 8 A (or more)https://www.aliexpress.com/item/1005006228795027.htmlZ motor splitter (or just solder the cables) + cable to mainboardhttps://www.aliexpress.com/item/1005004543040798.htmlInstructionsremove display and mainboard from MK3mount MINI mainboardconnect MK3 power supply (positive only) to SSR as power inputbed heating from mainboard to SSR as controllerconnect bed to SSR as output (negative directly to MK3 power supply)connect Z motors to motor splitter and connect it to mainboard (Z motor)connect all other cables to MINI mainboardmount MINI display and connect itload modified FW (https://github.com/Snake-Edition/P32-FW/releases/tag/v6.0.1.2)turn MK3 power supply ONturn MINI mainboard ONdouble/triple click the knobinstall the FWuse MK3.5 IS profile in Prusa Sliceroptional - cut MINI power cord and connect it to MK3 power supply