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Update arduino_hid.md

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Maxim Devaev 2020-08-21 02:06:26 +03:00 committed by GitHub
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@ -49,6 +49,8 @@ Follow this diagram:
|-------------------------------|--------|
| <img src="/img/ps2_kbd.png" alt="drawing" width="200"/> | Arduino pin 7 <-> PS/2 CLOCK<br>Arduino pin 5 <-> PS/2 DATA<br>Arduino GND pin <-> PS/2 GND |
**Connect VIN pin of Arduino to any Raspberry's 5v pin.**
## PS/2 keyboard & USB mouse
This is a mixed mode of HID which is a compromise for old computers. Connections are made simultaneously by both USB and PS/2 pins, as shown in the diagram above. Follow the [PS/2 instructions](#ps2-keyboard), but use these commands to build and install the firmware:
@ -56,3 +58,5 @@ This is a mixed mode of HID which is a compromise for old computers. Connections
# make mixed
# make install
```
**You don't need to connect the Arduino VIN pin if you connected USB (the Arduino will get power through it)**.