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JuicyBoard: modular and open source robotics kit
Built around an NXP LPC1769 Cortex-M3 MCU, the JuicyBoard has surpassed its modest funding goals on Crowd Supply, providing a modular, open source development kit for stepper motor oriented devices such as 3D printers and CNC routers.
The kits are based on one of two development boards: a 125 x 66mm R1000A board with 10 feature slots that sells for $64, and a more advanced, 175 x 66mm R1000AX with 15 feature slots, selling for $94. A variety of modules are bundled in these kits, and are also available separately.
The base feature set available on both boards includes the 120MHz MCU, a USB Type-B data port, and a USB Type-A port with 5V output that can power an external system like a Raspberry Pi. There are also 5V (3A output) and 3.3V (1.5A output) switching regulators. The board is powered by a 9-to-24V (27A) ATX compatible input.
The R1000AX model is further equipped with microSD and full-sized SD storage slots. You also get triple channel precision power monitors, as well as an LM5060 hot swap controller that protects the system from “overshoots, undershoots, and overloading.” This higher-end model also supplies a 100A PSMN1R2-30YLC,115 NFET switch for emergency shutdowns. Unlike the R1000A, the R1000AX is also capable of supporting Ethernet PHY modules.
The company used open source PCB design tools to create the JuicyBoard, and has open sourced all module hardware and firmware under GPL v3.0. A template KiCAD PCB project is available, as well as documentation for how to build a 3D printer or CNC router.