--- crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68
On Sat, Aug 27, 2016 at 9:03 AM, Vincent Legoll vincent.legoll@gmail.com wrote:
Hello,
First, congrats on the campaign success !
thxman.
I tried searching the ML archives & rhombus site, but couldn't find it.
Is the laptop's keyboard only option the Keyboard: Chicony P/N MP-03756GB-5287.
and associated variants, yes. see http://rhombus-tech.net/community_ideas/laptop_15in/pcbs/pcb2/
Or can a backlit one be substitued easily? I.e. No other HW redesign...
substituted yes... easily... well... a replacement keyboard has (physically touches) the following surrounding parts:
* back runner (left and right) * left edge, right edge * middle strut (underneath) * touchpanel tray * PCB1 support (left side) * Battery support (right side) * left front kbd support (for compartment) * right front kbd support
now, given that work on each of these, to fit a new keyboard, would take about 2-3 days of CAD work, 3-4 days of re-printing followed by iterative redesign *EACH PART*, a simple-sounding "can we replace the keyboard with something different" stacks up to a staggering 7-9 weeks just on 3D CAD work.
then PCB2 also needs to be redone, not just in terms of connector sourcing but also component placement and connector placement. after doing a feasibility study of approximately 2 weeks and sourcing the parts (another 2-3 weeks) this takes an estimated 1 week for the design plus another 4-6 weeks for the PCB to be manufactured and components source, purchased and assembled.
however before you get to that, you have to bear in mind that the connector placement may have a cascade knock-on effect on the PCB shape as well as the CAD design to *fit* the new PCB shape, now you're looking at an extra 2-4 weeks of iterative 3D work.
then also the keyboard's matrix has to be reverse-engineered because it's extremely unlikely that the manufacturers will tell you how it works. that requires disassembly of they keyboard, tracing its tracks and documenting them: this takes another 2-3 days.
then you need to reprogram the firmware. with the current firmware already in place that would take maybe a couple of days.
so.
simple-sounding question "can a new keyboard be fitted"... answer is: it's about 4 months of full-time work.
Or maybe the laptop case can be modified to allow placement of a few leds around the screen that would get light on the keyboard. I had this on an old T42p and it was better than nothing.
that would be much simpler - it's still abouuut... 2-3 weeks of work, redesigning casework, that's assuming no LED circuits are needed and there's a convenient place to draw power off of. if it was under PWM control of something (to change brightness) that's.. 3-5 weeks of PCB design work and PCB assembly, 1-2 weeks of component sourcing and verification.
That would make the laptop better suited to night use.
Wdyt?
*deep breath*.... get a small $2 torch from walmart :)
l.