Documentation
Hardware
Hardware v1

Hardware v1

If you are interested in aquiring a pre-built devboard, please contact @abenstirling on the Discord server. Otherwise the hardware exports are found here, and the BOM is found here

The goal for the hardware is to have a fully integrated:

  • Microcontroller
  • UWB module
  • Lights for visual feedback
  • Battery management system (for low power consumption)

Devboard

Devboard Devboard We currently have a devboard that is being used for development. The devboard is a custom PCB that has the following components:

  • SEED XIAO nrF52840
  • DWM3000
  • 2x RGB LED
  • USB-C for power and programming

We wire up the following:

DWM3000_RSTn - D1
DWM3000_IRQ - D2
DWM3000_SPICLK - D8
DWM3000_SPIMISO - D9
DWM3000_MOSI - D10
DWM3000_SPICS - D0

Most of the inspiration here is taken from the data sheet.

Hardware

Again, this is retrieved from the datasheet. LED/resistors are used to debug when figuring out SPI comms.

There are also 4 LEDS attached to the DWM-3000. These represent (left-to-right):

  1. Tx Frame Sent
  2. Rx Frame Received
  3. SFD
  4. Rx Frame OK

Hardware The LM1117MP-3.3 just needs 10u bypass caps on either side. I also put LED/resistors for debugging power.

Hardware The SK6812 just need 1u bypass caps, they are “daisychained” so are controlled by NEOPIXEL pin, GPIO3.

Hardware The layout is auite supreme (not as much as the previous). It is pretty similar to v0, however, with the XIAO board instead of the ESP-32 and no external USB-C connector since it came with the XIAO board.

Battery Tester

For testing our battery management system, we have a battery connector that can be used to connect a battery to the devboard. The requirements are as follows:

  • USB-C for power and programming
  • Battery connector
  • Voltage regulator
  • Battery management system

Instead of using a separate LP5907 regulator in the battery tester circuit (as done in v0), we have integrated the tester directly with the regular development board (Seduino). The battery output is connected straight to the Seduino’s battery input, and the Seduino’s built-in 3.3V regulator provides the necessary voltage regulation for the circuit.

We also added wireless charging into the board.

Thus here is the overall schematic for the project Overall Schematic

Hardware v0iOS