Table of Contents
Sources for global schematics are here
Sources for ready-to-solder PCB are here
Sources for desk design are here
- 22.99€, 3 x LCD displays: https://www.amazon.fr/dp/B07V5K3ZVB?ref=ppx_yo2ov_dt_b_product_details&th=1
- 8.99€, 15 x 3.3V to 5V signal converter: https://www.amazon.fr/dp/B082F6BSB5?psc=1&ref=ppx_yo2ov_dt_b_product_details
- 8.58€, 1 x LED kit: https://www.amazon.fr/dp/B08S2W74K7?ref=ppx_yo2ov_dt_b_product_details&th=1
- 10.99€, 1 x Flat cable: https://www.amazon.fr/dp/B082WZC56B?psc=1&ref=ppx_yo2ov_dt_b_product_details
- 11.99€, 1 x Connector kit: https://www.amazon.fr/dp/B089LZ14WB?psc=1&ref=ppx_yo2ov_dt_b_product_details
- 66.50€, 1 x Rasberry PI 4 model B: https://www.kubii.com/en/raspberry-pi-boards/2772-raspberry-pi-4-model-b-4gb-3272496309333.html
- 7,49 €, 1 x 16GB microSD: https://www.amazon.fr/dp/B07DVG12SF?psc=1&ref=ppx_yo2ov_dt_b_product_details
- 18.59€, 1 x USB Speader: https://www.amazon.fr/Umitive-Haut-Parleur-dOrdinateur-Compatibilit%C3%A9-Antid%C3%A9rapante/dp/B08JTRML6R/ref=sr_1_7?keywords=enceinte+usb&qid=1697275415&sr=8-7
- 38,27€, 13 x Custom made 5v LED push switches: https://fr.aliexpress.com/item/4000098893464.html?spm=a2g0o.order_list.order_list_main.10.21ef5e5b7tX8DX&gatewayAdapt=glo2fra
Sources for software are here
- Enable primary I2C port (/dev/i2c-1)
$ sudo raspi-config
(select 3. Interface options)
(select I5. I2C)
(select yes)
- Enable secondary I2C port (/dev/i2c-0)
cat /boot/config.txt
...
dtparam=i2c_arm=on
dtparam=i2c_vc=on
...
- Check I2C ports
# package to test gpio port
sudo apt install i2c-dev i2c-tools
# check i2c ports, should have 27 on
i2cdetect -y 1
i2cdetect -y 0
- Install sound support
sudo apt-get install pulseaudio pulseaudio-utils python3-vlc
- Configure default pulseaudio sink
pactl set-default-sink alsa_output.usb-C-Media_Electronics_Inc._USB_Audio_Device-00.analog-stereo
- Install software as user startup service
# install bquiz cli to ~/.local/bin
python3 -m pip install .
# install user systemd unit
mkdir -p ~/.config/systemd/user
ln -s $(pwd)/systemd/user/bquiz.service ~/.config/systemd/
systemctl --user enable bquiz.service
# run bquiz
systemctl --user start bquiz.service
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