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61  Using Arduino / Project Guidance / Re: camper leveler. on: May 10, 2014, 06:03:59 am
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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
62  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
63  Community / Bar Sport / Re: Back from the dead? on: May 09, 2014, 08:28:51 am
Thought I hadn't seen you for a while.

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Rob
64  Community / Bar Sport / Re: One of the most frustrating things about hobby EE on: May 08, 2014, 08:35:17 pm
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the official IDE solution is based on Eclipse
Correct, but AFAIK it uses GCC under the hood so maybe you can go retro smiley

The LPCxpresso forum is pretty good although not a patch on this one (but then what is), dunno if you can get an LPCXpresso board for the 4078 but if you can that would be a cheap way to start. They do have one 4000-series board, just can't remember which chip it uses.

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Rob
65  Community / Bar Sport / Re: One of the most frustrating things about hobby EE on: May 08, 2014, 07:25:56 pm
I've been playing with LPCs, very nice they are. Small, cheap, 32-bits, great peripherals, good IDE,  yada yada.

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Rob
66  Community / Bar Sport / Re: One of the most frustrating things about hobby EE on: May 08, 2014, 07:15:51 pm
This is exactly one the things that pisses me off about the electronics field these days, I design stuff and before I even get PCBs made there are 4  similar products on Kickstarter or the component is superseded.

After several goes at some SAM3 designs I got sick of all the new ARM boards coming out so I'm about to have a board delivered based on the mega2560, I figure that's a very popular chip and in most cases just as useful as an ARM, and hopefully it's going to be around for a while although Atmel must be thinking about dumping 8-bitters I reckon.

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Rob
67  Community / Bar Sport / Re: Your latest purchase on: May 05, 2014, 08:37:24 pm
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Just shows that hardware type people use real hardware tools, not those wimpy virtual tool chains...
My sediments exactly, time to man up I think smiley

GCC, Going Completely Crazy.

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percussive maintenance
Yes an expression we use as well, it seemed to work better with older equipment though, like CRT TVs etc.

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Rob
68  Community / Bar Sport / Re: Your latest purchase on: May 05, 2014, 07:22:44 pm
Yes that first item is for banging a bit, or indeed a lot, according to the protocol requirements.

It may actually be quite useful (in conjunction with a 3-pound ball-peen hammer) for fixing electronic devices that piss me off, my iPad for example.


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Rob
69  Community / Bar Sport / Re: Your latest purchase on: May 05, 2014, 06:14:30 pm
I can't think of any way to make this Arduino related, but what the heck.

I just bought some blacksmithing tools and I plan to set up a space for them, somewhere I can teach myself more about this craft (I have done some before).

Why? I really need a hobby that has nothing to do with computers or even electricity. I'll always be "into" embedded electronics, but a bloke needs some perspective and I've spent too many years sitting on my arse looking at computer screens.


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Rob
70  Using Arduino / Programming Questions / Re: Having issues using an Arduino to emulate a shift register. Details inside. on: April 30, 2014, 05:28:46 am
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A very important mistake to have made (Not connecting ground)
Arguably the most common problem we have here, why we didn't ask about this I have no idea.

Looks like it's working now.

I reckon we should distribute a logic analyser to all forum members, it would cut the number of questions in half smiley

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Rob
71  Products / Arduino Due / Re: Small-footprint Due on: April 29, 2014, 03:43:17 am
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mounting holes. These would increase the size of the board by 30%
How about having mounting tabs like the board on Gogol's Kickstarter link, they can snap off if not wanted.

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Rob
72  Using Arduino / Programming Questions / Re: Convert Characters (A,B C) to Number (1,2,3) Characters are sent from Processing on: April 28, 2014, 07:07:18 pm
Assuming you got 'A' from the serial port then

Code:
x = Serial.read();
x = (x - 'A') + 1;  // () not really required

will give you an ID of 1 if that's the required relationship and it seems that it is. This translates to

65 - 65 + 1

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Rob

73  Using Arduino / Sensors / Re: Seperate IC to Count Pulse Input? on: April 26, 2014, 06:38:12 pm
One of our members did a board with 4 (I think) tiny85s (or maybe 84s) whose job it was to do high-speed counting. There all talked to the master mega2560 with SPI.

I'll see if I can find the thread.

EDIT:
This is the thread, http://forum.arduino.cc/index.php?topic=69358.0, I didn't re read it to see if there are any details but I know that's what he did because I helped off line with it.

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Rob
74  Development / Other Hardware Development / Re: 8MB Ramdisk (external RAM) for Arduino.. on: April 24, 2014, 08:08:30 pm
Join the club, too many projects and too few years smiley

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Rob
75  Using Arduino / Networking, Protocols, and Devices / Re: I2C over RS422 using MAX485, will this circuit work? on: April 24, 2014, 07:07:08 pm
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As the receiver is always enabled I would say that this circuit drives itself as soon as SDA went low once.
Yes I think that's right, looks like a feedback loop to me.

Any reason not to use the I2C buffer chips? If you need > 50m there are versions that split the SDA and SCL signals into separate lines so you can use RS-485 or other drivers, the PCA9600 for example.

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Rob
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