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Open Source PCB for the Chorus RF Laptimer Software
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README.md

Chorus-RF-Laptimer-PCB

4in1 PCB for the Chorus RF Laptimer by Andrey Voroshkov https://github.com/voroshkov/Chorus-RF-Laptimer

IMAGE ALT TEXT HERE

https://www.youtube.com/watch?v=avLRJ5z0UP4

Features

  • PCB for 4 Nodes (4 Pilots)
  • easy extendable via JST XH cable (8 Pilots)
  • 5V stepdown for Arduinos
  • adjustable stepdown for RX Modules (use 3.5V to keep temperature low)
  • 92 x 92mm mounting holes
  • XT60 PowerIn
  • 5V USB PowerIn (if you want to use a powerbank)
  • stacked hardware - can be changed in seconds
  • Buzzer Port to connect one Buzzer per Node

Changelog

ALL RELEASES

22.05.2018 - v3.1 beta released DOWNLOAD

  • inital release
  • i did not tested this PCB. To V3.0 i just added the Diodes and did cleaned it up a bit. V3.0 worked so far. Please report any issues!

Important

Less than 4 nodes?

You can use less than 4 nodes. All you have to do, is to bridge TX/RX (see silkscreen) of the unused nodes. Always use at least "Node1" because the voltage measurement is connected to this node.

5 V power via USB

If you want to power the unit via 5 V USB, please remove stepdown marked as "Arduino" and bridge IN and OUT of it to pass the power from the USB to the Arduios.

How to track 8 pilots and more

If you plan to track more than 4 pilots at the same time, connect just connect two or more PCBs together.

  • Please always set the Loopback Jumper to the first PCB.
  • Connect the next PCB via 6Pin JST cable
  • On the first PCB, bridge MV
  • On following PCBs please bridge GM
  • WiFi/Bluetooth Module always connects to the last PCB. 

What do you need (4 nodes)

(some links are affiliate links)

Software

https://github.com/voroshkov/Chorus-RF-Laptimer

Blog post about the project

Ordering the PCB

you can order the PCB from china:

  1. Go to FUSION PCB www.seeedstudio.com
  2. Upload gerber file (chorus_4in1_3.1_gerber_file.zip)
  3. verify order settings
  • Base Material: FR-4
  • No. of Layers: 2
  • PCB Dimensions: 100mm x 100mm
  • PCB Quantity: 10 (you will get 10 identical PCBs - thats the minimum quantity)
  • No. of Different Designs: 1
  • PCB Thickness: 1.6mm
  • PCB Color: Red
  • Surface Finish: HASL
  • Minimum Solder Mask Dam: 0.4mm
  • Copper Weight: 1oz
  • Minimum Drill Hole Size: 0.3mm
  • Trace Width / Spacing: 6/6 mil
  • Blind or Buried Vias: No
  • Plated Half-holes / Castellated Holes: No
  • Impedance Control: No
  1. add to cart
  2. pay the order! Done!
  3. share unused PCBs with the community! =)
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