Chorus-RF-Laptimer-PCB

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

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)

• 1x 4in1 PCB
• 4x Arduino Pro Mini
• 4x RX5808 (with SPI mod)
• 12x 100 ohm 1206 SMD Resistor
• 4x 1k ohm 1206 SMD Resistor
• 1x 10k 1% ohm 1206 SMD Resistor
• 1x 1k 1% ohm 1206 SMD Resistor
• 4x 1n5817 smd 1A 20V do-214ac Schottky diode
• 2x 6 Pin JST XH 90° Connector
• 1x USB Breakout Board
• 2x Pin Jumper
• 1x DT-06 WiFi Module
• 1x 5V Stepdown
• 1x adjustable stepdown
• optional 6Pin JST XH cable for connecting two or more PCBs together
• 1x XT60
• 4x 3Pin Pin Header Socket
• 4x 6Pin Pin Header Socket
• 4x 12Pin Pin Header Socket
• 16x 2Pin Pin Header Socket
• manny Pin Header RM 2.54

(some links are affiliate links)

Software

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

Blog post about the project

• english https://blog.seidel-philipp.de/chorus-rf-laptimer-4in1-pcb-english/
• deutsch https://blog.seidel-philipp.de/chorus-rf-laptimer-4in1-pcb/

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

3. add to cart
4. pay the order! Done!
5. share unused PCBs with the community! =)