GTA04b7/Neo900

Issue 541: domesheet illumination

Reported by Joerg Reisenweber, Dec 23, 2013

LED white, emitting light sideways. 1.8mm * 1.0mm * ~0.3mm(!)
http://maemo.cloud-7.de/share-service/20131223_013.jpg
http://maemo.cloud-7.de/share-service/20131223_014.jpg

matching component needed. Particularly re height restriction.

Alternative(?): use rear-mounted LED shining from other side of PCB 
through a hole. Problem: change direction of beam 90° to shine 
sideways into lightspreader of domesheet

Comment 2 by Joerg Reisenweber, Dec 24, 2013

RGB 3.0*1.3*0.43mm  ~1.00EUR/1; 0.43 height seems in tolerance, 3.0 
width TBC
http://rohmfs.rohm.com/en/products/databook/datasheet/opto/led/chip_m
ulti/msl0201rgb.pdf
http://www.digikey.com/product-detail/en/MSL0201RGBW1/MSL0201RGBW1CT-
ND/2791603 
(not compatible with N900 LED driver concept which only supports 6 
LED via LP5523. This however would sum up to 18 LEDs. Needs further 
consideration, but highly desirable property of changeable kbd BL 
color. Add a few(3) LP5523 (EUR2.44/1)? )



White 1.8*1.0*0.35 right angle ~1.85EUR/1
http://media.digikey.com/pdf/Data Sheets/Rohm PDFs/SMLF13WBDW.pdf
http://www.digikey.com/product-detail/en/SMLF13WBDW11/511-1649-1-ND/1
956128



all-colors PicoLED-side  ~0.92EUR/1 white
http://rohmfs.rohm.com/en/products/databook/datasheet/opto/led/chip_m
ono/sml-r1.pdf
http://www.digikey.com/product-detail/en/SMLR13WBDW3/846-1095-1-ND/30
79578



white 2.8*1.4*0.8(! not 0.08 - so this one is *OUT*, but 
nevertheless awesome) sideview 2350mCd(!)@35mA CALL(!!)
http://media.digikey.com/pdf/Data Sheets/Optek PDFs/OVSRWAC2R6.pdf
http://www.digikey.com/product-detail/en/OVSRWAC2R6/365-1550-1-ND/220
3549



seems we have a few choices (and I don't claim I found all, not even 
in digikey) :-)
/j

Comment 3 by Joerg Reisenweber, Dec 26, 2013

photo of original for reference: 
http://play.qwazix.com/shared/_DSC5011.JPG
(sorry for poor quality of my own ones)

Comment 4 by Joerg Reisenweber, Jan 2, 2014

go for 6* RGB MSL0201RGBW1CT-ND, add 2 pcs lp5523 on same I2C bus 
(supports 4 distinct I2C addr via 2 ADDR-config pins). Move all kbd 
LED to the 2 new lp5523, leaving original lp5523 with indicator RGB 
and 6 open outputs usable  to our liking. 
kbd backlight in fremantle is controlled by mce which recently got 
RE'd, so sw side is no problem

http://www.digikey.com/product-detail/en/MSL0201RGBW1/MSL0201RGBW1CT-
ND/2791603
http://www.digikey.de/product-detail/de/LP5523TMX%2FNOPB/LP5523TMX%2F
NOPBTR-ND/2270369
(or LP55231 ?)

Comment 5 by Nikolaus Schaller, Jan 2, 2014

Cool!
Labels: Type:Enhancement Milestone:V2 Type:Defect
Status: Accepted

Comment 6 by Nikolaus Schaller, Jan 6, 2014

Unfortunately the LED proposed has a common Anode but we need common 
Cathode for the LP5523.

We can either look for different LEDs. What about 
http://rohmfs.rohm.com/en/products/databook/datasheet/opto/led/chip_m
ulti/msl0101.pdf - but there is no stock at the usual distributors.

Or we use a different LED driver (e.g. TCA6507).

Comment 7 by Joerg Reisenweber, Jul 3, 2014

http://www.ti.com/product/lp55281

Created: 10 months 28 days ago by Joerg Reisenweber

Updated: 4 months 17 days ago

Status: Accepted

Followed by: 1 person

Labels:
Type:Enhancement
Priority:Critical
Milestone:V2