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[ Electrical Division : Radar Power Design ]

Created by [ Mitchell Hoyt], last modified by [ Jack Marlow] on Nov 02, 2020

1. Research Requirements and Limitations for use of the Radar and Battery:
   1. Use research resources (ie. Autodrive, plus existing documents) to find critical information and limitations of the Radar and the Battery (ie. current draw, how fast can the voltage rise, etc) → Create/ Add on findings to existing Radar Documentation
   2. Discuss with mechanical about installation limitations. (ie. how we will route the wires and placement on the compute rack)
   3. Research secure connection options for design
2. Do simulations with LTSpice with some circuit design ideas, consider things such as heat, power consumption etc
   1. Develop specific document showing tests that need to be completed and expected results (Based on Step 1): ie. Voltage rise allowed, expected fluctuations, etc. 
   2. Develop results document, analyze the results and see if it works with the radar.
3. Draw schematic
4. Develop PCB layout with proper connectors for the radar, this should be researched

Voltage Converter Specs 

\

Min

Nom

Max

Unit

Input Voltage

4.5

\

30

V

Output Voltage

0.5

\

30

V

Voltage Ripple

20

\

30

mW

Output Current Limit

\

\

3

A

Power Limits

\

\

30

W

Efficiency (Step down)

87

\

90

\%

Efficiency (Step up)

88

\

91

\%

Frequency

\

180

\

kHz

Converter Dimensions - 48*23*21mm (Note Voltage converter suggested has no datasheet that we can find, looking into other options that give more details)

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https://www.amazon.ca/dp/B07S3WSBCD/ref=cm_sw_r_oth_api_i_K1d1DbQX93WHV#detail_bullets_id ———————————————————————————————

Radar PCB Rev. 0 - Designer: Jack

Image:

[{.confluence-embedded-image height=”400”}]{.confluence-embedded-file-wrapper .confluence-embedded-manual-size}[{.confluence-embedded-image height=”400”}]{.confluence-embedded-file-wrapper .confluence-embedded-manual-size}

Radar PCB Rev. 1  - Designer: Jack

[{.confluence-embedded-image height=”400”}]{.confluence-embedded-file-wrapper .confluence-embedded-manual-size}[{.confluence-embedded-image height=”400”}]{.confluence-embedded-file-wrapper .confluence-embedded-manual-size}

Board Dimensions: 

100mm x 160mm

Required Parts:

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Part Description (RefDes Associated) Amazon Link —————————————- —————————— J13, J14, J15 - 8 Pin Connector \

J1, J5, J6 - 2 Pin Connectors We should have already

J2, J3, J6, J7, J8, J9 - TBD (either
1Pin Header or Screws)

J10, J11, J12 - RJ45 Connectors
———————————————————————–

Question: How do we create the proper connection to connect to the car directly? Does a Screw Terminal work? Do we require any Mounting Holes in the PCB?

Rev1 Planned Changes: Jack Marlow{.confluence-userlink .user-mention}

• Add a Silkscreen
• Add Test Points
• Only set up for 2 radars
• Screw Terminals are okay for connecting the PCB to the Car
• Check Radar Setup to verify connections

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Attachments:

image2020-9-25_20-47-46.png (image/png)
image2020-9-25_20-48-10.png (image/png)
image2020-11-2_18-13-7.png (image/png)
image2020-11-2_18-13-48.png (image/png)\

Document generated by Confluence on Nov 28, 2021 22:40

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