Circle Of Light

WTF

Juli, pwnschlager, wirehead and I are going to build an LED project for Die Schmiede. We use this page to organize the project.

Architecture

Document describing the whole system: Datei:CoFArch.pdf

What we need (except electronic parts)

What?	Who?	Cost	Status
1000 WS2811 LEDs	amir & pwnschlager	138$	Order pending
(Guess) 4 x PC power supplies	?	?	We found two working power supplies
Oscilloscope	?	?	?
Tap measure	?	?	?
Lab power supply	wirehead	0$	Will bring it
Multimeter	meks	0$	meks has one
Solder iron, solder, short cables	meks	0$	meks has one, not sure about short cables, probably some restln
Long power cables	amir	0$	I have several meters
Long signal cables	amir	0$	I have a large box full of 1m audio cables
Microcontroller for usb to midi	?	?	?
Microcontrollers for midi to LED translators	juli	16€	We have four boards
Laptop	amir	0$	We are going to use my laptop
Fog machine?	?	?	?
Two Wiimotes	rin / ?	? / 0$	Maybe we may borrow from the lab / Can borrow from rin
4 sets of rechargeable batteries for the Wiimotes	amir	?	Had some lying around
PA	amir	0$	I've got decent and loud active speakers
Organize a net to mount the LEDs on	juli	?	?
Cable Ties	?	?	?
Caravan	?	?	?

What electronic parts we need

Quantity	Description	PartNr.	Cost	Status
25	220Ohm 1/4watt resistor	Digikey CF14JT220RCT-ND	$0.72	pending
10	1N4148 diode	Digikey 1N4148-TAPCT-ND	$1.78	pending
25	10kOhm 1/4watt resistor	Digikey CF14JT10K0CT-ND	$0.72	pending
25	470 Ohm 1/4watt resistor	Digikey CF14JT470RCT-ND	$0.72	pending
25	6N138 optocoupler	Digikey 751-1263-5-ND	$33.23	pending

TODO

What?	Who?	Cost	Status
Test the maximum length of a LED-strand (and therefor determine the number of needed power lines)	?	?	?
Program a Wiimote receiver for the laptop (x64-linux).	amir	0$	Already done for another project
Program visuals based on Wiimote input for the laptop	amir + pwnschlager	0$	amir wrote a visual
Encode the visuals to midi with a program for the laptop	?	?	?
Build and program a usb to midi transmitter dongle for the laptop. Optionally buy or borrow a midi interface	?	?	?
Build and program midi receiver to LED boards (short MW-boards) for each strand	?	?	?
Solder LED-strands with MW-boards	?	?	?
Solder power lines from power supplies to LED-strands	?	?	?

Code

I hacked wmgui (part of libcwiid) to output MIDI events and wrote a simple visual that slides over a large image depending on events, always only showing a portion of the image.

• wmgui code: https://github.com/kallaballa/Circle/blob/master/third/cwiid-0.6.00/wmgui/main.c
• visual code: https://github.com/kallaballa/Circle/blob/master/src/slide/slide.cpp