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by ridge
Thu Mar 22, 2012 4:02 pm
Forum: Off topic discussion
Topic: Suggestions for learning electronics/robotics?
Replies: 39
Views: 5538

Re: Suggestions for learning electronics/robotics?

<t>Most data sheets have a graph for reflow temperatures. Ideally, you do not exceed those while hand working parts.<br/> <br/> In the real world, keep the tip shiny clean for the best heat transfer and expose the components to the least amount of heating possible.<br/> <br/> Inexpensive Chinese sol...
by ridge
Thu Mar 22, 2012 3:36 pm
Forum: Off topic discussion
Topic: Suggestions for learning electronics/robotics?
Replies: 39
Views: 5538

Re: Suggestions for learning electronics/robotics?

<t>Back in the day when all components were through hole instead of surface mount, it was easier.<br/> <br/> Today, surface mount components for all of their space saving goodness have almost killed hobby electronics because of the higher cost of a basic setup.<br/> <br/> A good adjustable temperatu...
by ridge
Wed Mar 21, 2012 6:35 pm
Forum: General discussion
Topic: adquisition and production
Replies: 10
Views: 2040

Re: adquisition and production

<t>Grumpyoldgit said:<br/> <br/> <br/> I'm not even sure that Intel or AMD even make computers.<br/> <br/> <br/> <br/> Intel has a line of branded motherboards. The most interesting to me are the ones with the low-power Atom processors. As more ARM SoC devices sport multi-cores and faster clocks, th...
by ridge
Tue Mar 20, 2012 7:56 pm
Forum: Off topic discussion
Topic: Suggestions for learning electronics/robotics?
Replies: 39
Views: 5538

Re: Suggestions for learning electronics/robotics?

The Arduino Pro Mini 328 could one day fly in this...

http://www.multiwiicopter.com/

If not, it's still fun on a breadboard. *smiles*

(Don't blame us if this turns into an obsession)
by ridge
Tue Mar 20, 2012 7:08 pm
Forum: Off topic discussion
Topic: Favorite ARM embedded microcontroller?
Replies: 8
Views: 1901

Re: Favorite ARM embedded microcontroller?

<r>Nice catch on the libopencm3 library.<br/> <br/> I"ve had good luck on my Discovery boards with a fork of the LeafLabs libmaple library. This fork does not have support for the newer Discovery F4 board. It is stable in my opinion.<br/> <br/> <URL url="https://github.com/anton19286/libmaple">https...
by ridge
Tue Mar 20, 2012 3:35 pm
Forum: Other projects
Topic: Solar Tracking Device
Replies: 10
Views: 7312

Re: Solar Tracking Device

<r>These are cheap and proven trackers.<br/> <br/> <URL url="http://www.redrok.com/main.htm">http://www.redrok.com/main.htm</URL><br/> <br/> Homepower Magazine has some interesting articles on solar. (Both thermal and photovoltaic.)<br/> <br/> <URL url="http://homepower.com/home/">http://homepower.c...
by ridge
Tue Mar 20, 2012 1:24 pm
Forum: Off topic discussion
Topic: Suggestions for learning electronics/robotics?
Replies: 39
Views: 5538

Re: Suggestions for learning electronics/robotics?

Forrest Mims engineer's notebook series available at Radio Shack back in the day allowed the self-study of many electronics concepts with projects.

They are out of print I think, but the hand-drawn schematics and small breadboard projects were a painless and fun way to learn.
by ridge
Mon Mar 19, 2012 11:01 pm
Forum: Off topic discussion
Topic: Suggestions for learning electronics/robotics?
Replies: 39
Views: 5538

Re: Suggestions for learning electronics/robotics?

<r>This is a fairly tangled thicket of brambles in a simple question!<br/> <br/> I would vote for a remote control quadcopter, built up from an Arduino microcontroller.<br/> <br/> Lots of information online for beginners, and very much a robot even with the human intervention on the joysticks. The e...
by ridge
Sun Mar 18, 2012 7:52 pm
Forum: Off topic discussion
Topic: Favorite ARM embedded microcontroller?
Replies: 8
Views: 1901

Re: Favorite ARM embedded microcontroller?

<t>JamesH said: <br/> <br/> <br/> I prefer Broadcom.<br/> <br/> But then, I would...<br/> <br/> <br/> <br/> And for good reason! I think Broadcom is everyones favorite SoC vendor around here.<br/> <br/> Since the development tools for learning the ARM architecture are so fragmented, I am curious if ...
by ridge
Sun Mar 18, 2012 5:58 pm
Forum: Off topic discussion
Topic: Favorite ARM embedded microcontroller?
Replies: 8
Views: 1901

Re: Favorite ARM embedded microcontroller?

<t>ARM Holdings does not make hardware.<br/> <br/> Which vendor of ARM chips do you prefer, and why?<br/> <br/> This is the list of ARM licensees from Wikipedia and their market capitalizations.<br/> <br/> Arm Holdings   12.52B<br/> <br/> Alcatel-Lucent    5.51B<br/> <br/> Apple Inc.        545.97B<...
by ridge
Sat Mar 17, 2012 6:01 pm
Forum: Off topic discussion
Topic: Ordered something else to fill the time
Replies: 65
Views: 15326

Re: Ordered something else to fill the time

<t>Jessie said: <br/> <br/> ARM should be handing out free full featured IDEs for their microcontrolers.  There are some eval editions and limited feature ediditons out there that are piss-poor compared to AVR Studio 4 and 5.  The open source tool chain gets better every day so there maybe hope for ...
by ridge
Sat Mar 17, 2012 4:17 am
Forum: Off topic discussion
Topic: Ordered something else to fill the time
Replies: 65
Views: 15326

Re: Ordered something else to fill the time

<r>The STM32 Discovery boards are fun to start reading reams of data sheets and try to come to terms with low level coding on the ARM architecture. For hardware coders used to one clock signal and limited instruction sets on 8-bit AVR"s, Z80"s, 8080"s and the like, the convoluted multiple clock tree...
by ridge
Fri Mar 16, 2012 2:35 am
Forum: Off topic discussion
Topic: Walkies!
Replies: 2
Views: 615

Re: Walkies!

<r>I've finally decided what this whole Raspberry Pi thing reminds me of.<br/> <br/> Barbara Woodhouse calling "Walkies!" to every damn computer nerd in the world.<br/> <br/> The reaction seems identical.<br/> <br/> Edit: For those too young to remember...<br/> <br/> Half way down the page in the se...
by ridge
Tue Mar 06, 2012 6:49 pm
Forum: General discussion
Topic: BCM2835
Replies: 10
Views: 2302

Re: BCM2835

<t>Gert,<br/> <br/> A sincere thank you for making what specs are available for the BCM2835 public.<br/> <br/> Am I wrong in assuming that no more are forthcoming?<br/> <br/> Chip manufacturers usually fall all over themselves to make data sheets available.<br/> <br/> It's very strange to have to pl...
by ridge
Mon Mar 05, 2012 9:52 pm
Forum: Other projects
Topic: GERTBOARD Operation
Replies: 8
Views: 1818

Re: GERTBOARD Operation

<r>Sailing_Nut,<br/> <br/> In general, yes there are Linux ARM based drivers for SPI or I2C.<br/> <br/> Are specific drivers for the BCM2835 available? I don't know.<br/> <br/> Gert and Dom are the only ones that can answer at this time I think.<br/> <br/> For the logic level converting of the 3V GP...
by ridge
Mon Mar 05, 2012 9:09 pm
Forum: Other projects
Topic: GERTBOARD Operation
Replies: 8
Views: 1818

Re: GERTBOARD Operation

Yes, the future is 3V3 peripheral devices, especially over I2C.

However there are going to be a lot of very cheap 5V surplus components for experimenting for a long time to come.
by ridge
Mon Mar 05, 2012 7:47 pm
Forum: Other projects
Topic: GERTBOARD Operation
Replies: 8
Views: 1818

Re: GERTBOARD Operation

<t>Since the GPIO on the RPi is 3V only, I am assuming that if the ATMega is powered at 5V, some sort of voltage translator will be needed on the Tx/Rx pins?<br/> <br/> Are you planning to pre-flash a bootloader on the ATmega devices similar to Arduino or the AVR Butterfly board?<br/> <br/> Of cours...
by ridge
Sat Feb 25, 2012 7:44 pm
Forum: General discussion
Topic: Easy GPIO Hardware & Software
Replies: 133
Views: 50543

Re: Easy GPIO Hardware & Software

<t>Keeping in mind the intended end users and goals of the Raspi, and how the Broadcom ARM device is a lot more complicated than the simple devices many of us first learned on, I have a few thoughts…<br/> <br/> The Raspi is a full up computer with an OS. A bit overwhelming to use as an introduction ...

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