Wake Lamp: Difference between revisions
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* 1200mA / 60 LEDs = 20mA / LED | * 1200mA / 60 LEDs = 20mA / LED | ||
* installed length for 99 LEDs --> 1980mA at full brightness | * installed length for 99 LEDs --> 1980mA at full brightness | ||
** | ** measuerd at 1950-1960mA | ||
** suspect this is why things are getting hot | ** suspect this is why things are getting hot | ||
| Line 23: | Line 23: | ||
* 34 LEDs installed | * 34 LEDs installed | ||
* somewhere I have a reference of 60mA/each --> 2040mA | * somewhere I have a reference of 60mA/each --> 2040mA | ||
* measured | * measured for combined (arduino and colour LEDs) at 1200 - 1250mA | ||
* datasheet: https://www.adafruit.com/datasheets/WS2811.pdf | * datasheet: https://www.adafruit.com/datasheets/WS2811.pdf | ||
* bought on ebay [http://www.ebay.com/itm/50Pcs-WS2812B-LED-With-Heatsink-10mm-3mm-DC5V-5050-SMD-RGB-WS2811-IC-Built-in-/281270793101?pt=US_Lighting_Parts_and_Accessories&hash=item417d0bb38d] | * bought on ebay [http://www.ebay.com/itm/50Pcs-WS2812B-LED-With-Heatsink-10mm-3mm-DC5V-5050-SMD-RGB-WS2811-IC-Built-in-/281270793101?pt=US_Lighting_Parts_and_Accessories&hash=item417d0bb38d] | ||
Revision as of 19:53, 2014 September 23
A ceiling lamp based on a resting rowing shell from underwater.
Size
23" diameter circle-ish; that means 75.4" circumference, ie 1.9m
- also see #Power Supply
Electronics
LEDs and Arduino ordered from adafruit, order 469886, justthis1please!
Arduino
- Arduino Micro w/o headers - $24.95
Arduino Size
0.7" x 1.9" x 0.4" (17.77mm x 49.52mm x 11.59mm)
LEDs
white
- 60 LEDs/m, max 1.2A/m at full brightness
- 1200mA / 60 LEDs = 20mA / LED
- installed length for 99 LEDs --> 1980mA at full brightness
- measuerd at 1950-1960mA
- suspect this is why things are getting hot
colour LED WS2812B
- 34 LEDs installed
- somewhere I have a reference of 60mA/each --> 2040mA
- measured for combined (arduino and colour LEDs) at 1200 - 1250mA
- datasheet: https://www.adafruit.com/datasheets/WS2811.pdf
- bought on ebay [1]
Power Supply
- need 2A for each 5V (colour), 12V (white)
- 0.5A, so 60W
- ebay [2]
- 10.7 x 4 x 3cm