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6316  Using Arduino / Sensors / Re: How to connect LDR to arduino?(HELP) on: July 17, 2011, 12:03:43 pm
If the leads are long enough you could just poke them into the appropriate header holes. If not extend them with some wire soldered on.

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Rob
6317  Using Arduino / General Electronics / Re: Maximum Pull down resistor on analog pin on: July 17, 2011, 12:02:09 pm
Quote
The resistor will be switched with push buttons in parallel to a voltage divider.
It's not clear (to me anyway) exactly what circuit this is, how about a schematic.

In general though for example a 150R resistor will draw about 30mA from the pin, this is probably as much as should be drawn, 20mA (with a 250R resistor) is better.

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Rob
6318  Using Arduino / Project Guidance / Re: Interface one pair of rx/tx with multiple rs485 chips on: July 17, 2011, 10:11:16 am
First question, why the partition into 10 networks? You can run all 50 off a single cable.

Assuming you really need to do this you can control the DE and RE pins on each transceiver, so you shouldn't need the mux.

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Rob
6319  Development / Suggestions for the Arduino Project / Re: IDE - Serial monitor should stay open on: July 16, 2011, 10:16:49 pm
Yep, I imagine that would take about 20 minutes or less to implement auto opening/closing of the serial monitor if you were up to speed with the IDE java code. And people have been asking for something similar for at least as long as I've been on this forum.

To be fair I guess there are more important things to do and a limited number of people to do them.

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Rob
6320  Community / Bar Sport / Re: Google Plus! on: July 16, 2011, 09:48:32 pm
I can't find you there Mowcius, probably because I think you have to know real names and/or emails.

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Rob

6321  Community / Gigs and Collaborations / Re: Is Arduino eco-system the proper solution for my project ? on: July 16, 2011, 09:17:29 pm
If by "eco system" you mean the hardware and software environment/tools, then yes I'd say it's suitable. Definitely for a prototype and even a few production versions.

If this is going to be a product then it's an easy matter to build your own "Arduino" board with just the components you need.

What are you logging, how often, how long?

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Who could help us in such evaluation, is there some volunteers or consultants we could discuss with ?
We're all volunteers that will help. Some here will also contract to do this sort if thing.
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Rob
 
6322  Using Arduino / LEDs and Multiplexing / Re: Will This LCD Block Most Of My Arduino? on: July 16, 2011, 09:09:21 pm
Sure look that way, but that's typical of a display/UI shield and makes reasonable sense given that you have to read the display. smiley

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Rob
 
6323  Community / Bar Sport / Re: AVRfreaks.net on: July 16, 2011, 09:07:49 pm
Looks like they have some problem.

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Rob
6324  Community / Bar Sport / Re: Google Plus! on: July 16, 2011, 06:56:48 pm
I'm not into these social network sites at all but I am finding Google+ to be WAY better that FB from a user interface PoV. Also I think they have a better model.

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Does anybody have invites left?
I didn't realise there was a limit but I haven't invited anyone so I can invite you as well if necessary.

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Rob
6325  Using Arduino / General Electronics / Re: 959 shiftout capacitor on: July 16, 2011, 11:29:16 am
Yet again someone falls over that cap on the tute, can nobody fix the schematic?

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Rob
6326  Community / Website and Forum / Re: PLEASE!! NO ONE ANSWERS FORUM LOCKOUTS ETC!! on: July 16, 2011, 11:27:00 am
I can't believe this is still going on. We've got a few moderators now, maybe they can help.

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Rob
6327  Development / Other Hardware Development / Re: ATMEL Mega1284P evaluation board avalible on: July 16, 2011, 11:19:32 am
In the pre-SMD days you would normally load parts in order of their height, lowest through to highest. This way you could flip the board over to solder without them falling out.

That probably still applies to the PTH parts, with SMDs going on first.

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Rob
6328  Using Arduino / Programming Questions / Re: How do I check if a button is held down on reset? on: July 15, 2011, 11:43:42 pm
Just read the button/key in your setup function.

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Rob
6329  Using Arduino / Storage / Re: Problems with parallel sram on: July 15, 2011, 07:17:39 pm
Without looking at the code yet, I would remove ALL those caps and put them in the right places. Most of them go from 5v to VCC ! others go from GND to GND, and some are on data and clock lines.

All you need are caps from VCC to GND near each chip.

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Rob
6330  Using Arduino / Microcontrollers / Re: One arduino - 2 baud rate? on: July 15, 2011, 06:53:03 pm
It looks like you have a more or less valid GPS sentence, it's just spread over 20 lines smiley

But where are the dual baud rates? Is this still the deal? What's is "bmp085"?

Can you post all the code?

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Rob


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