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.

Document describing the whole system: Datei:CoFArch.pdf

What we need (except electronic parts)

What?	Who?	Cost	Status	Comment
1000 WS2811 LEDs	amir & pwnschlager	138$	Partial
(Guess) 4 x PC power supplies	?	?	Partial	We found two working power supplies & wirehead has one
Oscilloscope	?	?	Pending
Tap measure	wirehead	?	Done
Lab power supply	wirehead	0$	Done	Will bring it
Multimeter	meks & wirehead	0$	Done	meks has one
Solder iron, solder	meks & wirehead	0$	Done	meks has one
Long power cables	amir	0$	Partial	I have several meters. we have to figure out if that is enough.
Long signal cables	amir & wirehead	0$	Done	I have a large box full of 1m audio cables and two reels. wirehead also mentioned she had a reel.
Microcontroller for usb to midi	amir	4€	Done	We have 1 board
Microcontrollers for midi to LED translators	juli	12€	Done	We have 3 boards
Laptop	amir	0$	Done	We are going to use my laptop
Fog machine	nini	0$	Done	thx!
Fog liquid	?	?	Pending	I think i still have some stashed at the lab
Two Wiimotes	rin / ?	? / 0$	Done
4 sets of rechargeable batteries for the Wiimotes	amir	0$	Done	Had some lying around
PA	amir	0$	Done	I've got decent and loud active speakers
Organize a net to mount the LEDs on	juli & amir	?	Partial	We gonna scout this week
Cable Ties	wirehead	?	Done	I have several sizes
Caravan	wirehead	1000€ +	Pending	here is a list of options
Cable extension reel	amir	?	Done	Got one

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
10	Lochrasterplatine	Digikey 1738-1000-ND	$13	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 visuals
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 visuals. (I also ported it from C to C++ so i could use RTMidi and the wonder of C++ :p)

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

Visuals

• Slide: Kinetically slides over an image larger then the LED-matrix controlled by Wiimotes
• Piano: Reads midi events from an instrument and visualizes noteOn/noteOff events
• Spectro: Receives audio from a microphone and visualizes the spectrum
• Water: Receives audio from a microphone and visualizes the waterfall spectrum
• Video: Plays a video on the LED-matrix