Electric Bobby Car Hoverboard Upgrade
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This project puts two pairs of hoverboard motors in a Bobby Car toy vehicle, to give it 4x4 traction and a top speed of 29km/h with turbo activated.
Specifications
- Project start: January 2019
- Main controller: STM32F103 72MHz ARM Cortex-M3 core
- Motors: 4x direct drive 3-phase brushless DC electric wheel hub motors, 36V 350W ea
- Tire type: non-pneumatic rubber tire, road pattern
- Tire size: 7-inch / 170 mm
- Battery: Lithium-ion rechargeable 18650-cells, 10S2P 36V 4400mAh 158.4Wh pack with XT60 connector
- Upgrade: Controller can handle 13S (48V), 12S battery upgrade easiest
- Charger: Lithium-ion charger 42V 2A 3-pin connector with built-in fan
- Upgrade: External charger for anything else
- Internal connectors: JST Sales America B4B-XH-A(LF)(SN) 2.5mm pitch
Inspiration
- Larsm Allrad e-Bobby Car - great write up and custom firmware fork
- Niklas Fauth Hoverboard firmware hack - original firmware