LEDs data
=========

Specifications
--------------

From data sheet

		Luminosity		Vf

Pink		 75 mcd @  5 mA		2.8V @  5 mA
Blue		120 mcd @ 10 mA		3.0V @ 10 mA
Emerald		600 mcd @ 20 mA		3.0V @ 20 mA



Measured driven by UP5k
-----------------------

At several currents of the SB_RGBA_DRV :

Cathode Voltage
Anode Voltage [ Voltage across LED ]
-> estimated real current


2 mA			4 mA			6 mA			8 mA			10 mA			12 mA
										
Pink:

0.420 V			0.277 V			0.189 V			0.141 V			0.112 V			0.094 V
3.242 V [ +2.826 V ]	3.205 V [ +2.934 V ]	3.178 V [ +2.994 V ]	3.161 V [ +3.026 V ]	3.151 V	[ +3.044 V ]	3.144 V	[ +3.055V ]

~ 2.3 mA		~ 4.5 mA		~ 5.6 mA		~ 6.5 mA		~ 7.2 mA		


Blue

0.582 V			0.483 V			0.385 V			0.302 V			0.235 V			0.190 V
3.242 V [ +2.644 V ]	3.202 V [ +2.723 V ]	3.163 V [ +2.783 V ]	3.128 V [ +2.830 V ]	3.096 V [ +2.865 V ]	3.075 V [ +2.889 V ]


Emerald

0.799 V			0.626 V			0.491 V			0.373 V			0.282 V			0.214 V
3.241 V [ +2.443 V ]	3.201 V [ +2.579 V ]	3.162 V [ +2.676 V ]	3.124 V [ + 2.753 V ]	3.090 V [ +2.813 V]	3.063 V [ +2.856 V ]

~ 2.2 mA		~ 4.4 mA



Selected currents
-----------------

* Run pink led at 6 mA

  About the max current that's still a bit regulated

  Brightness ~ 88.5 mcd


* Blue led would need 7.375 mA to match brightness
  -> Run blue led at 8 mA

  Brightness ~ 96 mcd

  Apply scale factor 236 >> 8

* Green led would need 3 mA to match brightness
  -> Run green led at 4 mA

  Brightness ~ 120 mcd 

  Apply scale factor 189 >> 8