Created by [ Rowan Dempster], last modified by [ Jack Marlow] on Sep 25, 2020
To test that the parts work with the PCB, we have purchased two of each part. These should be in a cardboard box in the team bay. After you finish designing and manufacturing the PCB, try out the parts to make sure the connectors function. Then buy as many as you need to finish the board.
The chosen connectors are panel-mounted. This is so that the PCB can be enclosed in a 3-D printed box and have external connections. Terminal blocks and wires will be used to connect the PCB to the panel-mounted connectors.
Note that for the two-pin connectors, Mouser Electronics accidentally shipped us two male connectors instead of male-female. You will have to reorder that.
When you get to printing the PCB, I highly recommend PCBWay, a China-based company that has fast shipping and high quality.
Order Receipt
For your reference:
The full system will be comprised of 2 radars. Each radar will send
information to an ethernet box. The 2 ethernet boxes will be connected
to an ethernet switch for interfacing with the software. The purpose of
the routing system is to:
Ensure that the radars get a high-quality power supply
Improve modularity and scalability of the radar hardware system
Make sure nothing terrible happens (like some wires coming loose during
competition)
Ask Ali or James for the datasheets on these radars and ethernet boxes.
This design bundles the four wires coming out from the radar and routes the ethernet datastream from the radar to the ethernet box to ensure robustness.
Please check how the ethernet box is powered. If it is powered from its connection to the ethernet switch, the above design should be alright. If it is not, then you will need to add power and ground on the PCB for the ethernet box. Furthermore, each device needs protection in the form of a fuse to accomodate
Below is a recommended method of buffering power. I ordered linear regulators and they should be with the connectors. Try them in the below circuit.
You might have to experiment with things such as capacitor values (or if they are even necessary for this application), how many components to power in parallel with each power buffer, etc.
[C1]{.phui-tag-core .phui-tag-color-object
style=”color: inherit;”}=10uF
C2=0.1uF
C3=10uF
The above power buffer system will ensure a high quality power supply and is used in extremely noise-sensitive applications such as ultrasound devices. The 10 uF capacitors act as “storage tanks”, providing and sinking voltage when necessary to keep the input/output of the linear regulator buffered. The 0.1uF capacitor decouples high frequency noise to ground.
If you have any questions, email me at jy4luo@edu.uwaterloo.ca. Good luck!
The full Google Doc Andrew wrote is provided below. -Ali
https://docs.google.com/document/d/1YZjscXciysQmNjVRRxv1a83zNDrn5Og8PjSnbsItEPc/edit
Below is the power supply we plan to use (Note: product no longer exists in progress of finding new one).
https://www.amazon.ca/dp/B07S3WSBCD/ref=cm_sw_r_oth_api_i_K1d1DbQX93WHV
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Document generated by Confluence on Nov 28, 2021 22:40