led strip workshop - amt 7 aug 2012
DESCRIPTION
Slides shown at LED Strip light workshop on 7 Aug 2012. Includes links to resources.TRANSCRIPT
![Page 1: Led strip workshop - amt 7 aug 2012](https://reader033.vdocuments.net/reader033/viewer/2022042715/559c5d391a28ab67338b4581/html5/thumbnails/1.jpg)
LED strip light workshop
![Page 2: Led strip workshop - amt 7 aug 2012](https://reader033.vdocuments.net/reader033/viewer/2022042715/559c5d391a28ab67338b4581/html5/thumbnails/2.jpg)
WS 2801 based individually addressable LED strip -
http://www.sparkfun.com/products/10312
Or on eBay
![Page 3: Led strip workshop - amt 7 aug 2012](https://reader033.vdocuments.net/reader033/viewer/2022042715/559c5d391a28ab67338b4581/html5/thumbnails/3.jpg)
![Page 4: Led strip workshop - amt 7 aug 2012](https://reader033.vdocuments.net/reader033/viewer/2022042715/559c5d391a28ab67338b4581/html5/thumbnails/4.jpg)
Constant-current PWM
Three channels for RGBhttp://www.sparkfun.com/datasheets/Components/LED/WS2801.pdf
![Page 5: Led strip workshop - amt 7 aug 2012](https://reader033.vdocuments.net/reader033/viewer/2022042715/559c5d391a28ab67338b4581/html5/thumbnails/5.jpg)
SMD 5050 RGB LEDs used on strips
![Page 6: Led strip workshop - amt 7 aug 2012](https://reader033.vdocuments.net/reader033/viewer/2022042715/559c5d391a28ab67338b4581/html5/thumbnails/6.jpg)
Single “pixel”
![Page 7: Led strip workshop - amt 7 aug 2012](https://reader033.vdocuments.net/reader033/viewer/2022042715/559c5d391a28ab67338b4581/html5/thumbnails/7.jpg)
![Page 8: Led strip workshop - amt 7 aug 2012](https://reader033.vdocuments.net/reader033/viewer/2022042715/559c5d391a28ab67338b4581/html5/thumbnails/8.jpg)
![Page 9: Led strip workshop - amt 7 aug 2012](https://reader033.vdocuments.net/reader033/viewer/2022042715/559c5d391a28ab67338b4581/html5/thumbnails/9.jpg)
Pulse-width modulation
![Page 10: Led strip workshop - amt 7 aug 2012](https://reader033.vdocuments.net/reader033/viewer/2022042715/559c5d391a28ab67338b4581/html5/thumbnails/10.jpg)
![Page 11: Led strip workshop - amt 7 aug 2012](https://reader033.vdocuments.net/reader033/viewer/2022042715/559c5d391a28ab67338b4581/html5/thumbnails/11.jpg)
Power and wiring
0.02 amps per channel
3 channels per pixel
32 pixels per meter
0.02 x 3 x 32 = 1.92
~2.0 amps per meter
![Page 12: Led strip workshop - amt 7 aug 2012](https://reader033.vdocuments.net/reader033/viewer/2022042715/559c5d391a28ab67338b4581/html5/thumbnails/12.jpg)
Wiring guidelines
• Don’t power more than 1m from Arduino
• Keep power wires thick
• Inject power every 2 meters
![Page 13: Led strip workshop - amt 7 aug 2012](https://reader033.vdocuments.net/reader033/viewer/2022042715/559c5d391a28ab67338b4581/html5/thumbnails/13.jpg)
![Page 14: Led strip workshop - amt 7 aug 2012](https://reader033.vdocuments.net/reader033/viewer/2022042715/559c5d391a28ab67338b4581/html5/thumbnails/14.jpg)
Other sources
• Wires with pre-crimped terminals
http://www.pololu.com/catalog/category/71
• Crimp connector housings
http://www.pololu.com/catalog/category/70
• Power supply
https://www.adafruit.com/products/658