SlimeVR-Tracker-HW by Xuan25

A design of SlimeVR Tracker by Xuan25

• PCB: PCB designed with KiCAD 8.0.7
• Case: Case designed with FreeCAD 1.0.0
• Adapted firmware is available here

Features

• IMU: BNO085; MCU: ESP32-C3
• 3D printed case
• 2-layer PCB
• firmware uploading via USB
• 9-hour durability with 700mAh 803030 Li-Po battery
• Dimension: 57mm (l) x 37mm (w) x 23mm (h)
• Optimized for hand soldering (hot plate required), with enough spacing to comfortably handle 0603 SMD components and maintain adequate clearance.

Preview

Production Resources

Files

See the latest release for the production files:

• PCB-gbr.zip: Gerber files for PCB production
• PCB-BOM.csv: Bill of Materials for PCB assembly
• PCB-assembly-scale4.pdf: Component reference for PCB assembly
• 3DP.zip: STL model files for 3D printing

Assembly

In addition to the materials listed in the BOM for PCB assembly, you will also need:

• 700mAh 803030 3.7V Lithium Polymer Battery x1 (the battery)
• SSUH-003T-P0.15 x2 (socket contacts for the battery)
• SUHR-02V-S-B x1 (socket contact housing)
• 28AWG FEP Wire x2 (wires connect the battery and the PCB)
• 2mm thick EVA Foam Craft Sheets x1 (spacer between the battery and the PCB)
• 25mm width Elastic Band + Accessories

plus:

• 138°C Low Temperature Soldering Paste
• Solder Flux
• PCB Cleaning Solution + Brush
• 8mm Polyimide Tape + 30mm Polyimide Tape (for battery breakout board insulation)

Required tools include:

• ENGINEER PAD-11 Handy Crimp Tool (crimp battery connectors)
• Hotplate for SMD Soldering
• Soldering Iron
• Tweezers
• Diagonal cutting plier + Sandpaper (3D printing post-processing)
• (Optional) Light and Magnifier

Please note: Before you send the case model to your 3D printer

You may want to update the following parameters in the Case design Spreadsheet to match the performance of your 3D printer and material.

• Tol: Adjusts the clearance between mating parts. Increase this value if your 3D printer cannot achieve tight tolerances, ensuring the parts fit together properly despite limited printing accuracy.
• SnapFitNotchWidth: Controls the depth of the snap-fit notch. A larger value can provide a more robust snap-fit connection but requires the material to have better toughness.
  • Plastics are usually stronger than resin, so you should consider to use a lower value.
• BaseMargin: Controls the margin of the base. Since the snap-fit will catch on the base’s margin, a smaller margin requires the material to have sufficient strength to ensure a reliable snap-fit connection.
  • Resin are usually softer than plastics, so you should consider to use a greater value.