Low cost receiver
Prototype
pg. 3
Low-Cost SBAS Receiver Design (SkyTraq Venus 838) - 25/02/2020
This document describes Open Hardware and is licensed under the CERN OHL v. 1.2.
You may redistribute and modify this documentation under the terms of the CERN OHL v. 1.2. (
This documentation is distributed WITHOUT ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING MERCHANTABILITY, SATISFACTORY QUALITY AND
FITNESS FOR A PARTICULAR PURPOSE. Please see the CERN OHL v. 1.2 for applicable conditions
The printing process and final product are shown below:
3.1.2.
Enclosure Lid
The enclosure lid is designed with a tapered lip to allow a press-fit onto the outside of the
main enclosure. The tapered section may cause some issues if your 3d printer is not
correctly calibrated, as the walls become quite thin near the top. Depending on your 3D
printer and settings, this will take around 2-3 hours to produce. Please note that some
scaffolding may be required for the external labels to print correctly.
3.1.3.
Charger Tray
This tray is dimensioned to fit the Adafruit PowerBoost 1000 Charger Board. Once
assembled, both this tray and the board will hang upside-down from the rail in the Main
Enclosure, with the USB port exposed externally to allow easy recharging. Depending on
your 3D printer and settings, this will take less than 1 hour to produce.
3.2.
Preparing the Components
3.2.1.
Attaching Headers to the SkyTraq Venus 838 Evaluation Board
To allow the SkyTraq board to communicate via Bluetooth, it will require 4 header pins to be soldered onto the board. This is
easiest to achieve using a strip of breakaway headers. It is possible to connect only the pins that you will need, but this
increases the chance of damaging the connections due to decreased rigidity. Connecting the whole strip of breakaway
headers will also allow further flexibility if you choose to explore other functions of the board. As you can see in the figure
below, and in the attached SkyTraq Venus 838 schematic, the pins that we will need for this project will be number 2 (Power
for Bluetooth), number 8 (Ground for Bluetooth), and numbers 16 & 18 for Bluetooth Tx and Rx respectively.
