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46  Using Arduino / Programming Questions / Re: Memory Test on: August 01, 2014, 09:41:22 pm
@Placido, the chances of you having dodgy RAM are almost non-existent, whereas the chances of you running out of RAM are extremely high, in fact that's one of the most common problems we see around here.

You do not need a RAM test function, you need to look at re factoring your code to use less RAM.

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Rob
47  Using Arduino / Project Guidance / Re: How to detect length of circuit? on: July 31, 2014, 05:24:07 pm
As is often the case we need further information but the OP has disappeared.

If it's the normal random stack of blocks I think this will be very difficult, something like what KeithRB is proposing I guess but the logistics of powering all the CPUs and making reliable connections will be a drama.

But until we know more I'm out.

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Rob
48  Using Arduino / Programming Questions / Re: Cyclic Redundancy Check(CRC) code in arduino on: July 31, 2014, 12:01:45 am
If the values are same then there is probably no error.

I don't know if you can get a BER from a single check on the entire file though.

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Rob
49  Using Arduino / Project Guidance / Re: How to detect length of circuit? on: July 30, 2014, 08:06:14 am
Let's assume for now we don't have blocks that are several metres in height each smiley

Are we talking the normal stack where there can be different numbers of blocks per level? If so weight won't work and I can't see any way it can work.

Or is this some different application?

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Rob
50  Community / Bar Sport / Re: Beginner’s Blog on: July 30, 2014, 07:48:06 am
Thanks, that looks OK eh?

I've been out of electronics for a few months, been building a house, but I have a prototype board (Mega compatible) being built at present and should be getting back into it again soon when I get delivery of that.

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Rob
51  Using Arduino / Networking, Protocols, and Devices / Re: Wiring multiple devices to Arduino through SPI on: July 28, 2014, 09:58:44 am
MOSI, MOSI and SCK are all connected together, on every device connected to the bus. The master then activates a CS/SS signal for each slave when it wants to talk to that slave.
52  Products / Arduino Due / Re: visualmicro vs. JETAG adapter on: June 04, 2014, 03:36:22 am
Yep, that's it. For more $ you can get it in a box as well, worth it IMO so it's protected from shorting on stuff.

http://store.atmel.com/PartDetail.aspx?q=p:10500377#tc:description

Or for $85 with all cables it seems.
http://store.atmel.com/PartDetail.aspx?q=p:10500375#tc:description

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Rob
53  Products / Arduino Due / Re: visualmicro vs. JETAG adapter on: June 04, 2014, 02:40:01 am
SAM ICE will not work with AVR AFAIK, but they do have a new debugger that does both and it's pretty cheap, can't think of the name right now though.

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Rob
54  Community / Bar Sport / Re: Your latest purchase on: May 16, 2014, 05:59:33 pm
That's one of the key (and under-appreciated) features of that chip, it's an XMOS one way around but can easily be made into a SOWX simply by turning it 180 degrees. As to the difference in functionality, that's not documented very well though.

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Rob
55  Community / Bar Sport / Re: Your latest purchase on: May 15, 2014, 11:16:10 pm
I've looked at XMOS a few times over the years, very interesting system.

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Rob
56  Using Arduino / Sensors / Re: Seperate IC to Count Pulse Input? on: May 11, 2014, 08:04:30 pm
Yes you could use an FPGA or CPLD, one hell of a learning curve though just for this app, OTOH if you wanted to get into them this would be a good first project I think.

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Rob
57  Products / Arduino Due / Re: Due pinout diagram on: May 11, 2014, 07:05:11 pm
Why indeed?

I haven't looked at the functions of those pins for ages, maybe there was a good reason but IIRC I couldn't think of one when I first saw the schematic.


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Rob
58  Community / Bar Sport / Re: One of the most frustrating things about hobby EE on: May 10, 2014, 06:31:13 pm
Quote
If anyone knows any good impatient newbie day-one type stuff
Not me I'm afraid, I just bought some LPCXpresso boards and started tinkering, but it took longer than "one day" smiley

Actually I probably did have a blinking LED pretty quickly IIRC, it's not a turnkey as Arduino but pretty simple.

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Rob
59  Using Arduino / Project Guidance / Re: camper leveler. on: May 10, 2014, 06:03:59 am
Quote
as its a camper trailer, there is no issue with it in reguards to saftey if that makes sense
Not really, what if the legs extend while you are cruising down the highway?

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Rob
60  Using Arduino / Networking, Protocols, and Devices / Re: MCP23017 and analog temperature sensors? on: May 09, 2014, 08:40:21 am
I've never seen an I2C-controlled analogue MUX.

You could however use an ADC with an I2C interface, some of them have an internal MUXes for 4 or 8 inputs.

EDIT: Bugga, I didn't notice there was a page 2.

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Rob
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