Show Posts
Pages: 1 ... 412 413 [414] 415 416
6196  Forum 2005-2010 (read only) / Bar Sport / Re: Arduino board hierarchy on: December 06, 2008, 03:59:11 am
Fred, think of all the potential customers created by the goodwill from Mikal's contributions.  smiley-wink

And to everyone else here, please buy goods and services from Mikal's company so he doesn't get busted   smiley-grin

Mikal, what is it you do when you are not helping all the good people here?
6197  Forum 2005-2010 (read only) / Bar Sport / Re: Supply from China, suggestions please? on: October 13, 2008, 10:55:17 am
The 19264 ones has difference in pin15 and pin16 used for CS, It would be grateful if you could mod the library to handle the 00 state. Anyway, we should be cautious in stating the compatibility

The 192x64 pixel panel has three controller chips, the 128x64 panels has two.
Supporting more than two controller chips gets a little complicated. With just two controllers, the code just toggles between one and the other whenever the 64 bit boundary is crossed. With three or more chips, all the other chips need to be disabled. I think this is best done by adding a new method for controller chip selection. The method itself is not complicated (it would deselect all chips and select the chip with the x address modulo  64). But modifying the code to call this method in all the places needed requires some care.  Feel free to produce a suitable version of the code if you want to ( I will be happy to give you advice) , but until code has been modified and tested, it would not be accurate to describe the 192 pixel panel as compatible so would respectfully ask you to modify that statement on the product pages with the 192 pixel panels

Let me know if I can be of help
6198  Forum 2005-2010 (read only) / Bar Sport / Re: Supply from China, suggestions please? on: October 13, 2008, 05:58:04 am
Eric, I just noticed you have a 192x64 display on your site noted as compatible with the PlaygroundGLCD library

I am a little surprised it works. The library code was written assuming two controller chips each up to 64 pixels wide. Does the panel have two controllers each 96 bits wide or three controllers?

Has it been tested with the library?

If it doesn't work, send me a Personal Message and I will see if I can help with some mods to the library to get it going.
6199  Forum 2005-2010 (read only) / Bar Sport / Re: Supply from China, suggestions please? on: October 13, 2008, 05:42:56 am
I notice that Eric has a link on his site to the Arduino playground library. Let me know when you have it hooked up and working and I will add it to the list of compatible panels.
6200  Forum 2005-2010 (read only) / Bar Sport / Re: TEST Please ignore. on: September 22, 2008, 06:20:50 am
It's no use, I just can't ignore them.


SPAM  smiley-grin
6201  Forum 2005-2010 (read only) / Bar Sport / Re: Neuroscience on: October 06, 2008, 04:43:52 am
Bah.  Hard to repair, hard to back up, hard to interface to, tough to reprogram, and the support infrastructure is bulky and messy.
On the contrary, self repairing, almost infinite amount of memory (although access seems to get slower over time) and an amazing range of sensors already interfaced. And the support infrastructure (eating, drinking) is a pleasure in itself. And don't forget the activities required for the creation of new systems  smiley
6202  Forum 2005-2010 (read only) / Bar Sport / Re: Atmel "interesting news." on: October 06, 2008, 03:20:46 pm
my experience with Atmel flash in a mass produced item in the early part of this decade leave me with not the best impression of their skills. The end of line test on flash chips consisted of erasing it and checking for all zeros and programming all ones into it. That was it!!!
Needles to say that we had a 25% return rate on that product.

Some one once told me (at a conference in Las Vagas) that Intel employed all the people not smart enough to work for Microsoft and that Atmel employed all the people not smart enough to work for Intel.

And those not smart enough to work for Atmel work for companies that use Atmel flash?

Just joking mike, couldn't resist  smiley-wink
6203  Forum 2005-2010 (read only) / Bar Sport / Re: New Board - Nice! on: September 15, 2008, 01:19:11 pm
We just installed this yesterday and we're trying to do our best to finetune the spam settings.. It's a bit annoying for us but keeps a lot of spammers out

Considering that from now on I'm manually approving any new user to filter out spammers...
Thanks for your efforts, they are much appreciated.
One bit of fine tuning you may want to consider is to reduce or eliminate the delay for modifying an existing post. I would think that only valid users would bother changing text  they already posted.
6204  Forum 2005-2010 (read only) / Bar Sport / Re: Resistor Group Buy on: September 13, 2008, 12:22:16 am
seeing as how nobody sells a large pack of resistors cheap with the variety i want. i am going to do my own.

I have a supplier that can do 100 each of 86 different types of resistors 1/4 watt carbon film  for $28.

That is 86,000 resistors for $28.

I need 10 total people to join, i have 3 so far, I have offered this to the atlanta arduino group

Once i have 7 People Commit to buying, They can send me $28 via paypal. and should recieve their resistors in about 2 weeks.

Sorry US shipping only.

You can email me at

You may want to consider this source

I purchased 2000 metal film resistors for $15.99 shipped. You get 40 of each value from 1 ohm to 10 megohms (50 different values).

You get fewer resistors than your deal but for less outlay you get 1% metal film, and you don't need 9 other  people to make it work.

p.s. 100 off of 86 values is 8,600 resistors

6205  Forum 2005-2010 (read only) / Bar Sport / Re: Cheap Oscilloscope on: August 06, 2008, 02:19:56 am
Sound cards take an audio input. This means the voltage should be less than  ±1 volt on the auxiliary input, but check the specs for your card. A voltage divider is usually used to drop the voltage into that range and a 10k pot works well for me.
6206  Forum 2005-2010 (read only) / Bar Sport / Re: Cheap Oscilloscope on: August 04, 2008, 06:32:06 am
How about a scope based on Arduino:

Although a sound card would give better resolution (16 bits vs 10) and higher sampling rate (44khz vs around 10khz for the arduino),  but for relatively slow waveforms its nice to have a solution that's easy to customize. You would need to use a second board for the scope if the signal you wanted to measure was generated by an arduino, the scope board will be working flat out sampling and sending the data.

6207  Forum 2005-2010 (read only) / Bar Sport / Re: Cheap Oscilloscope on: July 25, 2008, 02:41:15 pm
Hi melka, how about free?

At the relativly slow data rates of an RC decoder, you could use your computer sound card with some freely downloadable software to display the waveform.

Have a search on google for: sound card oscilloscope
6208  Forum 2005-2010 (read only) / Bar Sport / Re: Hello! on: February 12, 2008, 04:11:47 am
Hi eustace, if the thread was a discussion with examples of driving robots then the hardware interfacing would be where I would think it would go. Or if its to proudly show what you have built then a thread in the exhibition area would be appropriate. Either way, please do share  smiley.
6209  Forum 2005-2010 (read only) / Bar Sport / Re: Hello! on: February 09, 2008, 10:17:15 am
Hi Carsten, welcome to the arduino.  You should have no trouble finding servo and mouse code for your arduino robot. But give a shout if you need any help.

p.s. if you find a 'show new posts' capability, let me know where it is. It would be very useful.
6210  Forum 2005-2010 (read only) / Uno Punto Zero / Re: internal pullup resistors & digitalWrite on: March 28, 2010, 04:10:12 am
It kind of mirrors pin 13 with the flashing LED - you can just plug an LED in without worrying about resistors.

Yes you can do that to make things simpler for beginners, but its not good practice.  The current Arduino boards do not have a resistor in series with pin 13 (its only in series with the internal LED) so the typical red LED plugged in directly will exceed the Atmel recommended pin current.

That, and starting off with external pull-downs are the way many people have been introduced to Arduino, but they are not necessarily the best way to learn.
Pages: 1 ... 412 413 [414] 415 416