Light-Wave

Note this project began in 2014 and used a raspberry pi B version 1.2. It then was updated in fall 2020 for the P 4. It runs a live feed from a camera to a LED display 16 x 21.

The following materials are required:

-Canvas

-Adafruit Neopixels

-2 fadecandy boards

-Logitech camera

-Raspberry Pi 4

-Mini SD card

-USB charger for Pi at least a 1.5A one

-5 Volt Power Supply - 40A Single Output (https://www.circuitspecialists.com/5-volt-40-amp-power-supply.html)

-Power cable plug - 110 (https://www.amazon.com/gp/product/B06XQZFD36/ref=ox_sc_act_title_1?smid=AKX4PUL0YEZW2&psc=1)

-wire

-electrical tape

-soldering iron

-HD Dispay (this can be removed after the install)

-HMDI cable

Here is how to run it.

1. The power cord is for the inverter before you plug it make sure the 220/110 switch inside is set to 110

2. Connect the red and black cables from the LED screen to the power supply. Red cables go to any last 3 slots, black to any 3 middle ones.

3. Connect the usb camera, and each Fadecandy with a usb cable to the Pi.

4. Plug in the LED charger

5. Connect Pi to a USB charger

6. Pi should boot and autorun the app on the pde files are installed on the Pi sd mini card. It takes 3 minutes 30 second for the boot. During that time nothing will happen so you have to be patient.

Setting Up the Pi 4 with the app

Open the terminal on the Pi. Run each command to set up the system:

sudo apt-get install libtiff5-dev libjasper-dev libpng12-dev

sudo apt-get install libjpeg-dev

sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev

sudo apt-get install libgtk2.0-dev

sudo apt-get install libgtk-3-dev

sudo apt-get install libatlas-base-dev gfortran

sudo apt-get install libatlas-base-dev git

sudo apt-get install python3-pip

pip3 install numpy

pip3 install opencv-python

git clone https://github.com/scanlime/fadecandy

cp fadecandy/examples/python/opc.py ~/Desktop/opc.py

fcserver

git clone https://github.com/nikolozka/ledcam

cd ledcam

cp ~/Desktop/opc.py opc.py

python3 usbcam.py

---

Check the json is file is the correct folder sudo find / -name "fcserver*" /usr/local/bin/fcserver.json

#Change the serial number to match your FadeCandy boards The brightness can be changed too by altering the white point

{ "listen": [null, 7890], "verbose": true,

"color": {
	"gamma": 2.5,
	"whitepoint": [0.7, 0.7, 0.7]
},

"devices": [
	{
		"type": "fadecandy",
		"serial": "GWMWBJKSCCNVVLED",
		"map": [
                            [ 0,  168, 512, 21 ],
			[ 0,  188, 576, 21 ],
			[ 0,  209, 640, 21 ],
			[ 0,  230, 704, 21 ],
			[ 0,  251, 768, 21 ],
			[ 0,  272, 832, 21 ],
			[ 0,  293, 896, 21 ],
			[ 0,  314, 960, 21 ]

		]
	},
	{
		"type": "fadecandy",
		"serial": "YUFMPVJBVDHNLXOT",
		"map": [
			[ 0,    0,   0, 21 ],
			[ 0,   21,  64, 21 ],
			[ 0,   42, 128, 21 ],
			[ 0,   63, 192, 21 ],
			[ 0,   84, 256, 21 ],
			[ 0,  105, 320, 21 ],
			[ 0,  126, 384, 21 ],
			[ 0,  147, 448, 21 ]

		]
	}
]

}

Run LightWave

To run it in one terminal window type (or up arrow :)

sudo /usr/local/bin/fcserver /usr/local/bin/fcserver.json

and leave it. In another:

python3 ~/ledcam/usbcam.py