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Showing results 1 to 25 of 79 @ 0.01 seconds. Search: Posts Made By: wpwrak
Forum: Neo900 2016-12-31, 13:04
Replies: 29
Views: 55,232
Posted By wpwrak
Re: Announcements related to Neo900

We updated the IO expander white paper:

http://neo900.org/stuff/papers/iox.pdf

There were quite a number of changes, as the document's role progressed from specifying design requirements...
Forum: Neo900 2016-12-26, 16:00
Replies: 29
Views: 55,232
Posted By wpwrak
Re: Announcements related to Neo900

We have yet another white paper ! This one is about the v2 prototype:

http://neo900.org/stuff/papers/v2.pdf

This document gives an overview of the v2 prototype, describes how it is composed,...
Forum: Neo900 2016-12-22, 12:43
Replies: 29
Views: 55,232
Posted By wpwrak
Re: Announcements related to Neo900

We made a small update of the white paper for the infrared subsystem:

http://neo900.org/stuff/papers/ir.pdf

The changes:

- the IR logic is now controlled through an I2C-accessible register...
Forum: Neo900 2016-12-01, 23:58
Replies: 14
Views: 44,766
Posted By wpwrak
Re: Roadmap, diagrams, and other planning stuff

Another small update of the header selection document: it now lists a few male 2.54 mm dual-row through-hole headers, as candidates for the connection between v2 and BB-xM. I also clarified some...
Forum: Neo900 2016-11-22, 01:25
Replies: 29
Views: 55,232
Posted By wpwrak
Re: Announcements

We have made another update of the Hackerbus white paper, with the following changes:

- GPIO_d now uses configurable VAUX3 as supply, not a fixed 2.7 V rail

- Documented alternative Hackerbus...
Forum: Neo900 2016-10-04, 02:00
Replies: 19
Views: 15,659
Posted By wpwrak
Re: Community driven PR

Hellekin is now preparing pretty frequent short summaries and also the occasional longer article. Please check the "Archive" column at
http://neo900.org/

- Werner
Forum: Neo900 2016-07-01, 18:46
Replies: 29
Views: 55,232
Posted By wpwrak
Re: Announcements related to Neo900

We just made another update of the white paper for the infrared subsystem:

http://neo900.org/stuff/papers/ir.pdf

The main changes:

- defined the (pretty tricky) control logic for the IR...
Forum: Neo900 2016-06-28, 21:36
Replies: 16
Views: 26,146
Posted By wpwrak
Re: Spacerframe - Impressions of Neo900

May I draw your attention to the Hackerbus white paper ?
http://neo900.org/stuff/papers/hb.pdf

There are enough GPIOs for 1 bit operation, or if you use some of the UART signals as GPIOs, then...
Forum: Neo900 2016-06-23, 01:36
Replies: 29
Views: 55,232
Posted By wpwrak
Re: Announcements related to Neo900

We did a quick evaluation of interrupts, and is seems that most interrupts could end up in a wakeup role. The IO expanders we're interested in are all interrupt-capable (and can mask interrupts from...
Forum: Neo900 2016-06-22, 20:04
Replies: 29
Views: 55,232
Posted By wpwrak
Re: Announcements related to Neo900

We have a new white paper ! This one discusses IO expanders:

http://neo900.org/stuff/papers/iox.pdf

An IO expander is a chip that connects to the CPU (in our case via I2C) and provides a number...
Forum: Neo900 2016-06-14, 23:09
Replies: 29
Views: 55,232
Posted By wpwrak
Re: Announcements related to Neo900

We have released an update of the SIM switch document:

http://neo900.org/stuff/papers/simsw.pdf

We have extended counter-surveillance of the modem and related parts of the system by adding...
Forum: Neo900 2016-05-29, 23:55
Replies: 29
Views: 55,232
Posted By wpwrak
Re: Announcements related to Neo900

A small but important update of the Hackerbus paper:

http://neo900.org/stuff/papers/hb.pdf

There is only one change (it's all in the appendix, since it doesn't affect Hackerbus itself but the...
Forum: Neo900 2016-05-25, 22:17
Replies: 3,075
Views: 1,093,500
Posted By wpwrak
Re: Neo900 - finally a successor of N900

He did not "leave" the project, but is busy (for several months) with Pyra. Joerg hinted at the situation in this post on tmo:
http://talk.maemo.org/showthread.php?p=1502058
Though I can see how...
Forum: Neo900 2016-05-24, 13:42
Replies: 3,075
Views: 1,093,500
Posted By wpwrak
Re: Neo900 - finally a successor of N900

There are actually pretty good news: Joerg's search for someone to do
the layout of the v2 prototype finally paid off, and we're now working
out the details of how to accomplish the transition.
...
Forum: Neo900 2016-03-30, 23:32
Replies: 14
Views: 44,766
Posted By wpwrak
Re: Roadmap, diagrams, and other planning stuff

Hellekin implemented stricter content security policy on neo900.org: to limit opportunities for cross-site scripting attacks, we now avoid inline CSS and JavaScript, and serve assets from our server...
Forum: Neo900 2016-03-08, 01:41
Replies: 3,075
Views: 1,093,500
Posted By wpwrak
Re: Neo900 - finally a successor of N900

Wow, it even measures the flash duration !

The parameters look quite consistent with the results from "torch" mode, as expected. And yes, these LEDs have manufacturing tolerances in the order of...
Forum: Neo900 2016-03-06, 16:51
Replies: 3,075
Views: 1,093,500
Posted By wpwrak
Re: Neo900 - finally a successor of N900

I did a quick search for material supporting that LED current would directly affect color, but didn't find anything. However, I did find that junction temperature has a significant effect on color:
...
Forum: Neo900 2016-03-06, 15:53
Replies: 3,075
Views: 1,093,500
Posted By wpwrak
Re: Neo900 - finally a successor of N900

Thanks a lot, this is great data ! A question about interpreting the color temperatures:



I realize that there is a lot to know about light that I didn't even know I didn't know ;-) Of these...
Forum: Neo900 2016-02-16, 21:44
Replies: 14
Views: 44,766
Posted By wpwrak
Re: Roadmap, diagrams, and other planning stuff

The mechanical design of Neo900 is affected by numerous parameters that originate from N900, and that we have to determine by measuring case and other parts. So far, we did many of these measurements...
Forum: Neo900 2016-02-11, 22:54
Replies: 29
Views: 55,232
Posted By wpwrak
Re: Announcements

We have just released an update of the Hackerbus white paper, with quite a number of improvements (see below).

Link to the latest version of the document:

http://neo900.org/stuff/papers/hb.pdf...
Forum: Neo900 2016-02-02, 13:44
Replies: 19
Views: 15,659
Posted By wpwrak
Re: Community driven PR

For most of the development, a Neo900 would look just like a N900. Developers of a different OS would only really need a Neo900 prototype if they want to explore special features, things like the...
Forum: Neo900 2016-01-28, 21:48
Replies: 14
Views: 44,766
Posted By wpwrak
Re: Roadmap, diagrams, and other planning stuff

A little update to the header selection document: we looked at a few options for improving the Hackerbus connections, and to help with this discussion, I added female through-hole 1.27 mm (50 mil)...
Forum: Neo900 2016-01-09, 14:04
Replies: 3,075
Views: 1,093,500
Posted By wpwrak
Re: Neo900 - finally a successor of N900

Great, thanks a lot !

I currently have my eyes set on the L130-5780002011001 with 5700 K and a minimum CRI of 80%. CRI is something new I found:...
Forum: Neo900 2016-01-09, 01:36
Replies: 3,075
Views: 1,093,500
Posted By wpwrak
Re: Neo900 - finally a successor of N900

The ones I know unfortunately don't contain part numbers.

Also
http://www.electronicproducts.com/Nokia_N900_Mobile_Phone-whatsinside_text-90.aspx
knows the price has nothing else to say but...
Forum: Neo900 2016-01-09, 01:20
Replies: 29
Views: 55,232
Posted By wpwrak
Re: Announcements

Here we go. First, both at an angle:
https://neo900.org/stuff/werner/spacer/2/spacer-10-angled.jpg

Then, "Neo900" with N900 stacked on top:...
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