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Closes #9 Update readme, provide images, pcb and 3d qr adapter model #13

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Closes #9 Update readme, provide images, pcb and 3d qr adapter model
sabifa Oct 29, 2020
9592e89
#9 Update readme and PCB files
sabifa Nov 15, 2020
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Binary file added Pro Mini V2 3.3V/3D model/Fanatec QR Adapter Pro Mini.stl
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# Pro Mini V2 3.3V 16 MHz
What you'll need:
* Fanatec QR
* [Pro Mini V2](https://www.ebay.com/itm/Enhancement-V2-Pro-Mini-328-16Mhz-3-3V-5V-adjustable-Arduino-Compatible-40Pins/324180291509?hash=item4b7aa6afb5:g:~UgAAOxymiVQ~6z~)
* FTDI Adapter USB to TTL Programmer
* PCB [can be found here](eagle%20pcb%20files/Gerber.zip)
* upload `Gerber.zip` to a PCB service like JLCPCB and order them
* 6x M5x20mm countersunk screws (e.g. DIN 7991)

optional:
* 8 pin JST connector
* 2x M2.5 screws to secure the pcb to the 3D model

# How To
* Make sure that the solder bridge on the Pro Mini is set to 3.3V
* uncomment following lines:
* `#define HAS_TM1637_DISPLAY` - we are not using the TM1637 display module
* `#define HAS_ANALOG_DPAD` - otherwise the funky switch is constantly pressed
* Program the Pro Mini using the option ATmega328P (5V, 16 MHz)
* Mark the cable coming from the QR which is 5V
* Solder the cables onto the pcb. Make sure that the marked cable (5V) is aligned with the 5V PCB pin
* You can either solder the wires coming from the Fanatec QR directly to the PCB (recommended) or use an 8 pin JST connector so you can plug the cables coming from the QR into it
* I had connection problems using the JST connector as the cable did not stick in correctly all the time, so I just soldered the wires and everything worked fine afterwards.
* Bend the cable so that it fits into the QR housing like so:
![Bent cable](photos/02.JPG)
![Bent cable 2](photos/01.JPG)
* Take the 3D printed QR adapter, put two M2.5 screws into each hole to secure the pcb
* Make sure that the cable is not squeezed and use the six M5 screws to mount it to the Fanatec QR
* Done!
![Done](photos/03.JPG)
![Done2](photos/04.JPG)

# Warning
If you ever connect the FTDI to the board while also having it connected to the wheelbase **make sure to remove the VCC pin on the FTDI interface**, otherwise it might **damage your wheelbase** because this will connect the 3.3V coming from the FTDI with the 3.3V of the wheelbase.

# Downsides
* In some rare cases my base reconnects if I connect the emulator to it. Nothing wild, just let it recalibrate and you're ready to race
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8 changes: 7 additions & 1 deletion README.md
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# Arduino_Fanatec_Wheel
A do-it-yourself steering wheel to Fanatec's wheel base.<br/><br/>
**29.10.2020** Run the project on a 3.3V Arduino without a logic shifter<br/>
![Assembled Pro Mini with PCB and QR Adapter](Pro%20Mini%20V2%203.3V/photos/03.JPG)
[more info here](Pro%20Mini%20V2%203.3V/README.md)

*You can run the code on a 3.3V Arduino without the need for a logic shifter. This allows for a small enough pcb and 3D model to hold it, which you can then mount onto your custom wheel. Because the model is only 16mm high you won't have any space issues.
________________
**28.04.2020 Coronavirus update:** Version 1 is out!<br/>
![Steering wheel assembled](https://raw.githubusercontent.com/lshachar/Arduino_Fanatec_Wheel/master/Steering%20Wheel%20Photos/1%20assambled%202020-04-09%2008.11.24.jpg)
[check out more photos here](https://github.com/lshachar/Arduino_Fanatec_Wheel/tree/master/Steering%20Wheel%20Photos)
Expand Down Expand Up @@ -34,7 +40,7 @@ Also, [Alevale found where to buy the connector](https://github.com/darknao/btCl
### Several options:
- Use a 5V arduino with a logic level shifter. (recommended, this is what I use. [(here are The schematics)](https://github.com/lshachar/Arduino_Fanatec_Wheel/blob/master/schamtics%20arduino%20nano-level%20shifter-fanatec%20round%20plug.png)
- Use a 5V arduino **without** a logic shifter (can be risky to your precious wheelbase)
- Use a 3.3V arduino (I haven't tried it. They run on 8 MHZ instead of 16 MHZ for the 5V arduinos, but I'm pretty sure 8MHZ should be fast enough.)
- Use a 3.3V arduino (You will need an Arduino Pro Mini V2 which runs 3.3V at 16 MHz, as 8 MHz is not fast enough. For a more detailed guide [please read this](Pro%20Mini%20V2%203.3V/README.md))

Code was tested on arduino Uno and Nano, and works fine. However, they both output 5V and the SPI communication on the wheelbase
is using 3.3V.
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