Re: Ambient light sensing via LED response

2009-05-01 Thread Nate Ridderman
On Fri, May 1, 2009 at 2:28 PM, C. Scott Ananian wrote: Oh, yeah, you should be able to wire the top side of the LED directly to the LED and measure the photovoltaic current directly; that's not patented: battery voltage Q1 | ---from

Re: CL1B power distribution

2009-04-25 Thread Nate Ridderman
Any chance of getting schematics and PCB files this time around? I doubt you renegotiated your contract with Quanta to allow for this, but it doesn't hurt to ask. Thanks, Nate On Sat, Apr 25, 2009 at 12:23 AM, John Watlington wrote: BTW, Gen 1.5 is the OLPC codename for the

Re: CL1B power distribution

2009-04-25 Thread Nate Ridderman
On Sat, Apr 25, 2009 at 10:05 AM, wrote: smith wrote: Additional changes from Gen 1 include the ability to both measure DC input current and VIN voltage, as well as EC control over the current drawn from the DC input. The intent was to better support charging

Re: View Slides is in

2009-02-03 Thread Nate Ridderman
There was an email thread about problems with not long ago - see I was having the same problem and I sent an email to I'm not sure if it was ever resolved for my account, because I

Re: multitouch + audio feedback linux dev - XO-2?

2009-01-26 Thread Nate Ridderman
On Mon, Jan 26, 2009 at 7:22 PM, Nirav Patel wrote: 1) Are there any existing hooks/systems for Linux for multi-touch? That's the only proper way you can get a virtual keyboard to work for a double-touchscreen clamshell device (the feasibility of which is not sold to me

Re: New joyride build 2613

2008-12-30 Thread Nate Ridderman
On Tue, Dec 30, 2008 at 3:51 PM, wrote: I thought you were trying to not have perl in the system? My understanding is that Joyride builds are kicked off automatically when there is something new to build. A new version of Perl was posted to the Fedora repositories, so Joyride

Re: 9.1 Proposal: Power.

2008-10-23 Thread Nate Ridderman
Do we have the ability to pulse width modulate the backlight LEDs? What is the resolution on the PWM? It's hard to know if this is feasible without a hardware schematic and specs on the backlight driver. The CL1 spec mentions a PWM signal, but maybe it only has four bits of resolution? In the

Re: Stability and Memory Pressure in 8.2

2008-09-10 Thread Nate Ridderman
My layman's understanding is that you can't execute in place from the NAND flash on the XO. XIP requires NOR flash which is more expensive than NAND but has faster read speeds. It mentions this briefly on the axfs FAQ. Storing some executables and libraries in a separate uncompressed partition

Re: PlayGo Patches/Commit access

2008-07-19 Thread Nate Ridderman
Andrés, Go is one of my favorite games, so I'm excited to see that someone has picked up development again! It requires such balance between aggressiveness and defense, as well as local play vs spreading out on the board - I think it's a great game for kids to learn. I look forward to trying out