Motor unit
davidanton·OpenVNAVI·hardware/PCB/motor unit/motor unit.kicad_pcb
About the Motor unit PCB
Motor unit is an open source PCB design by davidanton, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 17.5 × 17.1 mm, with 6 components from 6 distinct parts.
By type, the board carries 1 module, 1 transistor, 1 connector, 1 diode, 1 capacitor and 1 resistor.
From the project
A Vibrotactile Navigation Aid for the Visually Impaired
Bachelor Thesis at the Media Computing Group, Computer Science Department @ RWTH Aachen University (Germany) Author: David Antón Sánchez Project Website: https://hci.rwth-aachen.de/openvnavi
OpenVNAVI is a vest equipped with a depth sensor and array of vibration motor units that allow people with visual impairment to avoid obstacles in the environment.
The ASUS Xtion PRO LIVE depth sensor, positioned onto the user’s chest scans the environment as the user moves. From the video feed of the depth sensor a frame is captured and then processed by the Raspberry Pi 2. Each frame is downsampled…

Motor unit bill of materials (BOM)
6 components, 6 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 2RB18Z1B5 | Vibration_motor | M1 |
| 1 | 2N7002 | SOT23-5_MOD_PINOUT | Q1 |
| 1 | CONN | Pin_Header_Straight_1x03_MOD | P1 |
| 1 | 1N4148 | SOD-323 | D1 |
| 1 | 100nF | SMD0805 | C1 |
| 1 | 47K | SMD0805 | R1 |
Motor unit design files
The KiCad project lives in the davidanton/OpenVNAVI repository on GitHub; these links point at the commit this page was built from.
Motor unit: common questions
How big is the Motor unit PCB?
The Motor unit measures 17.5 × 17.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Motor unit?
6 components, from 6 distinct parts. The full bill of materials is listed on this page.
Where can I download the Motor unit design files?
From the davidanton/OpenVNAVI repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Motor unit design in my own project?
Yes, under the terms of its GPL-3.0 license, which davidanton chose for the repository.