Lockbox Assembly Docs
Purpose
These docs collect the Lockbox hardware assembly information in a self-contained folder for future aggregation into ohai.researchanddesire.com. They are written as open hardware assembly instructions for OSS builders and manufacturing collaborators.
Safety first
The Lockbox contains a 3.7 V lithium polymer (LiPo) battery. The build uses superglue, a hot glue gun, isopropyl alcohol, small neodymium magnets, and soldering. Read the safety notes at each step of the assembly guide.
- If a battery swells, leaks, gets hot, or smells, stop charging or using it. If it is safe to do so, move it to a non-flammable surface, away from anything that can burn. Do not use it again. If it smokes or catches fire, leave the area and call emergency services.
- Keep loose magnets away from children and pets. Swallowed magnets can cause serious internal injury.
- Before a finished Lockbox holds a key, read Safety & Emergency Access and both emergency options: the software emergency unlock and the destructive hardware emergency unlock (break the backplate).
Lockbox overview
Lockbox is a small-scale consumer electronics product built around a custom PCB, ESP32-S3 firmware, a motorized latch, magnetic sensors, TFT display, rotary encoder, battery, and 3D-printed plastic housing.
| Property | Value |
|---|---|
| Dimensions | 57 mm x 43 mm x 134 mm |
| Plastic volume | 156,408.422 mm^3 |
| Current housing material | 3D-printed PLA plastic |
| Embedded magnets | Three to four magnets in the plastic housing |
Assembly package
CERN-OHL-S v2 (hardware) / MPL-2.0 (firmware)