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1  Using Arduino / Project Guidance / Re: Ethernet shield diagram help... on: August 11, 2012, 02:18:49 pm
Actually thinking about it I think I'm going to take your advice Majenko and just buy one.
Ebay - £7.43
http://www.ebay.co.uk/itm/Ethernet-Shield-W5100-For-Arduino-328-UNO-Mega-2560-EKitsZone-UNO-/221088934086?pt=UK_Sound_Vision_Other&hash=item3379ed68c6
2  Using Arduino / Project Guidance / Re: Ethernet shield diagram help... on: August 11, 2012, 01:35:49 pm
There's a schematic on http://arduino.cc/en/Main/ArduinoEthernetShield but without knowing exactly what parts you have, I don't know if it will help you.
I very much doubt you'll find the components you need for an ethernet shield in a PC.

PC network cards are considerably more complex than an Arduino one.   For a start, they are interfaced with a bus like the PCI bus or similar.  The Arduino doesn't have such facilities.  Instead, it's usually the SPI bus that is used for controlling the Ethernet card.

So, you will require an ethernet chip that talks SPI - something that you just don't get in the PC world (it's too slow).

There's two basic chips that are used - the W5100 from Wiznet, which is on the "official" ethernet shield.  This is an all-in-one chip that provides both the ethernet interface and the IP stack.  It makes programming it from the Arduino's point of view very easy.

Then there is the ENC28J60 from Microchip.  This is just an Ethernet interface chip that is controlled by SPI, and it requires that the Arduino generate all the packets to send, so you need an IP stack in software.  There are a number of schematics online for this chip, and libraries to go with them, but due to the limited resources of the Arduino it's hard to create a good, full featured library to support this chip.



Thanks guys, some of the stuff I have in the attic is pretty damn old. Some 1/10 NICs up there I think. I'll take a look to see if there is a wiznet chip.. I'll let you know.
3  Using Arduino / Project Guidance / Ethernet shield diagram help... on: August 11, 2012, 01:19:52 pm
I have an attic full of old PC components so I'm pretty confident I will have most, if not all of the required bits'n'bobs to create my own breadboard Ethernet shield. However, I cant find a schematic to make one. Can anyone help with this?

Thanks 
4  Using Arduino / Installation & Troubleshooting / Re: I'm a bloody idiot, please help me!!!! ASAP on: January 10, 2012, 07:12:53 pm
When the IDE displays the message "Binary sketch size: nnn bytes...", hit the reset button.

I'll give it a go next time I sell my brain for magic beans
5  Using Arduino / Installation & Troubleshooting / Re: I'm a bloody idiot, please help me!!!! ASAP on: January 10, 2012, 06:36:55 pm
Never mind, I cursed at it and it worked. I also swaped USB ports before trying to upload which helped. God knows why however it would be interesting if someone could explain.
6  Using Arduino / Installation & Troubleshooting / I'm a bloody idiot, please help me!!!! ASAP on: January 10, 2012, 06:27:45 pm
(in my infinate wisdom) I've managed to load a sketch to my Mega that sends a Tx through the serial port every 500ms, and now I cant load a revised sketch to the board. What can I do?
7  Using Arduino / Project Guidance / Re: Wiimote on Arduino Setup on: January 09, 2012, 05:00:25 pm
Looking at the guide its built to support the Cambridge Silicon Radio(CSR) Bluecore 4 Chipset.
this should do it http://www.dealextreme.com/p/super-mini-bluetooth-2-0-adapter-dongle-vista-compatible-16229
8  Using Arduino / Project Guidance / Re: Mega and Motor Controller questions on: January 09, 2012, 04:33:00 pm
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but pin6 pin7 and (tx3 14) look like they will be covered by the tail end of the shield
Ah, that makes sense. In that case, you could get extra header connectors and make spacers between the motor shield and the Arduino, like this: http://www.sparkfun.com/products/9280 They come in 8 pin lengths, too. That would give the needed clearance to wire to the pins that might be obscured, but not used, by the shield.

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I'm sure I've seen some sort of full form shield that you plug the Xbee into?
Sure. http://www.sparkfun.com/products/9976

I thought you were talking about making an XBee.


Sweet that answers that one, what do you think for this one? do you think A) its any good and B) how difficult would it be to build onto a Mega proto rather than the supplied uno PCB
9  Using Arduino / Project Guidance / Re: Mega and Motor Controller questions on: January 09, 2012, 04:29:57 pm
I've just bought and built a Tamiya tracked chassis with dual gearbox and I now want to control the motors, both directions with variable speeds.

Before we go too much further - which Tamiya tracked chassis are we talking about?

We can probably assume you're talking about their small plastic kit they sell, that uses 3-6 volt motors; but just so we don't bumble down the wrong path, can you provide a link to the product?

Tamiya sells a variety of R/C tank chassis kits, some quite large with powerful motors, which no ordinary Arduino shield can drive - for these kinds of chassis, the choice of the motor controller will be vastly different.

Yeah don't worry its only the twin 3v one.
http://www.tamiyausa.com/product/item.php?product-id=70108 - chassis
http://www.tamiyausa.com/product/item.php?product-id=70168 - Gearbox upgrade
10  Using Arduino / Project Guidance / Re: Mega and Motor Controller questions on: January 09, 2012, 03:09:39 pm
So, I don't know where you got the idea that only pins 6 and 7 are used, nor do I know what you mean by tx314. I assume that is a typo.
Sorry I didn't explain myself properly what I meant was, I understand that the shield sits on the required pins which are then available if not used by the boards function from the top of the shield and the ones that arent taken by the shield are still available direct from the board but pin6 pin7 and (tx3 14) look like they will be covered by the tail end of the shield...not that it matters much I'm just trying to make sure I know what I need
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XBees are not open source. The schematics are closely guarded secrets.
I'm sure I've seen some sort of full form shield that you plug the Xbee into? dunno
11  Using Arduino / Project Guidance / Re: Mega and Motor Controller questions on: January 09, 2012, 01:46:19 pm
thanks for the advice BTW I appreciate it
12  Using Arduino / Project Guidance / Re: Mega and Motor Controller questions on: January 09, 2012, 01:45:22 pm
Ok, so from what I can see if I was to get for eg:the genuine Arduino controller http://arduino.cc/en/Main/ArduinoMotorShieldR3 id only relatively loose pin 6 and possibly pin7 and tx314? as the overlap of the board looks like it will cover. Just for clarifications sake though do you know of any fully supported DIY motor controller kits that I can build onto a proto, I want to add an xbee too so I could in theory (pin usage permitting) build both circuits onto the one proto. I'm getting beyond myself now as I've not even checked if they do a DIY xbee but I think if I build it I'll understand it more.
13  Using Arduino / Project Guidance / Re: Mega and Motor Controller questions on: January 09, 2012, 09:52:21 am
Oh right I thort the Uno was wider....fail, will I still have access to all the Mega's pins or will the shield cover some up making them unuseable?
14  Using Arduino / Project Guidance / Mega and Motor Controller questions on: January 09, 2012, 08:35:29 am
Hi All, it's a very long time since I've been on, how are you all?
I've just bought and built a Tamiya tracked chassis with dual gearbox and I now want to control the motors, both directions with variable speeds. I'm looking for either a motor controller that plugs straight into my Mega which doesnt use a Uno board style or a fully supported DIY motor controller that I can wire onto a Mega proto or I suppose as a last resort a schematic that will achive the same outcome.
I've looked everywhere and can only seem to find boards in an Uno format or what seem as dodgy DIY motor kits that I am unsure if they will be supported.

Thanks guys
Adam
15  Using Arduino / Installation & Troubleshooting / Re: HELP - Really irritating problem. on: August 17, 2011, 05:18:47 pm
update on progress
I have forced the use of the included java package, JRE7 and java 6.
neither works so I'm pretty confident this is not a java issue
-----
further update
I have an identical laptop with the same OS build (6.1 7600) and it works fine, however the screens broken so this is no solution.

also the issue persists in safe mode.

I have run virus, adware, malware and spyware scans and the machine is clean
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