If you find you want a larger robot than the standard 100x80mm Rosmo platform this is a larger 170x110mm option that also uses the Open Robotic Platform mount holes. You’ll note that most the electronics components are shared between this verson and the smaller bot, making an upgrade easy and affordable. You can also re-use the 100x80mm ESP32 mounting plate from the smaller robot to save soldering/fabrication cost.
BOM
Status: untested work in progeress
~£? ~$? for 4wd can be reduced, by using existing powerbank for example
| Components | Description | Quantity |
|---|---|---|
| Rosmo-M Chassis Plates | Custom PCB Chassis | 5 |
| Motors with encoder, mount & 65mm wheels | JGA25 or JGB-37 | 4 |
| Motor Driver | Zio H-bridge Motor Driver | 1 |
| Heatsinks for motor Driver | 12x13x7mm | 2 |
| ESP32-S3-C1 | Olimex open hardware, UK US or generic version | 1 |
| USB powerbank | battery case 1x or 2x 18650 battery or open hardware 18650 battery | 1 |
| 1,2, or 3x 18650 | Batteries | 1 |
| 3S Lipo battery | ~$21 2200Mah or ~$38 4000Mah | 1 |
| 3S charger | USB charger | 1 |
| XT60 > Barrel cable | power cable | 1 |
| XT60 > switch | power cable | 1 |
| 6pin 1.5mm(ZH) > 2mm encoder cable | 100mm cable | 1 |
| Barrel> Screw terminal | barrel adaptor | 1 |
| Battery> Motor driver cable | JST cable | 2 |
| Qwiic cable | For connecting ESP32 | 1 |
| Hex Spacers | 45mm height M3 standoff | 1 |
| M2 Bolts & nuts | 400pc Bolt pack | 1 |
| M3 Bolts & nuts | From Bolt pack | 10 |
| Screw Driver | 2 in 1 Flat and Philips Head Screw Driver | 1 |
| Optional (recommended) IMU | MPU6500 or BNO085 | 2 |
| Optional LiDAR Kit for use with ROS2 | LiDAR module, USB Cable and Data Convertor Box | 1 |
Please refer to the 100x80mm Rosmo platform page for software & addons information.
