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46  Using Arduino / Microcontrollers / Re: Wiring SparkFun's latest "Basic FTDI Breakout board" to a breadboard on: July 16, 2012, 09:43:28 am
Theres still a lot of mileage in 'old school' Arduino.........

It lost something when the Uno came along IMO.
47  Using Arduino / Microcontrollers / Re: Wiring SparkFun's latest "Basic FTDI Breakout board" to a breadboard on: July 16, 2012, 08:30:04 am
Its a "semi standard" 6 pin interface (or at least it used to be pre Uno).

The RBBB uses the same pinout. Modern device do their own version :  http://shop.moderndevice.com/products/bub_ii

http://shop.moderndevice.com/products/rbbb-kit

Exactly how its wired :

http://cdn.shopify.com/s/files/1/0038/9582/files/RBBB_Instructions_06.pdf?1260749296



48  Community / Bar Sport / Re: Alan Turing, Father of Computer Science, Would turn 100 this year on: July 15, 2012, 10:17:58 am
Something of a sad chapter in history for us Brits, Alan Turing was credited with shortening the War by 5 years because of his work with ciphers, but we hounded him to death because he was homosexual. 
49  Community / Bar Sport / Re: Raspberry Pi launch farce on: July 15, 2012, 10:10:01 am
Iron fist over there, I dared to question why RS Components had taken my money when theres a 10 week lead time for delivery and fobbed me off 3 times when I rang to complain.   The mods decided that 'Don't buy from RS components' as a thread title didn't make the cut for "everything Pi is rosy" and they deleted it. What they doing, paying their Chinese suppliers up front with my money ?.  You could probably get stuff made from scratch and shipped over here on a slow container boat in less than 10 weeks........
50  Using Arduino / General Electronics / Re: My power circuit for raspberry pi, arduino and loads. Help needed on: July 15, 2012, 09:55:39 am
If you're only using 2 pins, why bother with a Mega ? a vanilla Uno will draw less power.  Hooking a Pi up is going to give you all the computing grunt you'll need.  The Pi is tetchy on power and current draw, I'd give it a mile headroom......
51  Using Arduino / Installation & Troubleshooting / Re: Updating Uno R2 to enable HID on: July 14, 2012, 03:12:34 pm
Funny how that unholy botch made it into the official documentation and the simple version didn't :



Dunno if its any help with an R2 or not
52  Using Arduino / General Electronics / Re: 5 V power on board turns off on: July 13, 2012, 09:15:02 am
I'd check to see if you've got a short circuit on your mouse with a meter of some kind.
53  Community / Bar Sport / Re: Lead Free Solder - I hate you EU guys... on: July 12, 2012, 12:10:23 pm
'Proper' old school 60/40 solder is still freely available on fleabay smiley
54  Using Arduino / Installation & Troubleshooting / Re: Uploaded Sketch on: July 09, 2012, 05:40:26 pm
Not as a sketch, no. You can possibly get the machine code from the board, but the source code (sketch) can't be derived from it.
55  Community / Bar Sport / Re: Raspberry Pi launch farce on: July 09, 2012, 09:36:21 am
As this seems to be the place for rebel Pi users, I just posted this 'over there'. It does have some Arduino content but it doesn't have a place in 'our' main forum. We'll see if it stays there......

Quote
Finally got my Pi which turns out to be one I ordered on-line way back and I thought hadn't 'flagged' with Farnell's site. and I left it. I have one I ordered later apparently coming this week...

Anyway on with the plot. I'm an old Linux hand (12 years +) and I set my Pi emulating a job I presently have a hacked ARM NAS box doing namely pulling data out of an Arduinio, potting graphs and providing a Web interface for my home monitoring system. :

http://pluggy.is-a-geek.com

I intend to make a few for other people, and as the said hacked NAS box isn't available anymore I though the Pi would be an ideal replacement. I wouldn't have to hack it and its the right price point.
Its basically a collection of BASH shell scripts running as Cron jobs. I've spent 3 days trying to get it to work reliably, but it crashes constantly.

3 Different power supplies (no cheap nasty Ebay tosh either, one of them is a 2.5 Amp Dlink adapter that once belonged to a router I modified to feed the Pi via the GPIO pins), 2 different 8 GB SD cards (1 Samsung, 1 Sandisk). Its running headless but I have connected a Monitor & Keyboard. Everything works, no problem at least for a time. It reads stuff off the internet and the local network (wired ethernet port) as well as the Arduino which is plugged into on of the USBs.
It will run for a few minutes or maybe an hour and then dies. The lights stay on but it stops responding and stops updating log files at the same time. Sometimes I get a load of stuff in log files suggesting its having problems with the USB and network, sometimes not. Tried Debian
Squeeze, Arch Linux and Debian Wheezy, changing memory mix sizes, done Hexxeth's firmware updates, and all the tweaks I can find. They all do exactly the same on each power supply and SD card. If I leave the Arduino unplugged, it will usually run for several hours before crashing, but it still does. Tweaking the BASH scripts so it doesn't do so much stuff on the network/internet also helps. Not doing much on the network at all seems to keep it alive for extended periods, but that kind of defeats the object of the exercise.

Reading some of the developers comments on Github doesn't exactly inspire me with confidence, the finger seems to point at the (my paraphrase) unholy botch that is the USB/Ethernet hardware system and the closed source patched into opensource (or is it the other way around  ) drivers for said hardware. I'm not expecting my next Pi when it arrives to behave any differently. I've tried playing with it with a GUI and browsing the internet and it works, but I generally get fed up of the performance on most sites before it gets around to crashing.

Any pointers ? But I've probably already tried it......

http://www.raspberrypi.org/phpBB3/viewtopic.php?f=28&t=10011&p=119416#p119416
56  Using Arduino / Project Guidance / Re: Soldering wire issue (not "stick") on: July 05, 2012, 04:44:09 pm
Cat 5 should have copper, either solid or stranded  wire. The price of copper means that some cheap (crap) cat 5 uses aluminium. It doesn't solder so easily (not at all with standard kit).
57  Using Arduino / Displays / Re: LCD drawing too much power? on: July 03, 2012, 11:41:56 am
Which is why I said just connect the GND & 5V.  With the right colour panels (Black on Green), they work without the back light anyhow.
58  Using Arduino / Project Guidance / Re: Query on Arduino without USB on: July 03, 2012, 04:45:30 am
The link I posted will program the micro-controller, it is connected to RX & TX. It needs an ISP to put the bootloader on the chip, but thats the case anyway. The original serial Arduino didn't have a RS232 chip of any kind, it was just a circuit involving a couple of transistors to invert the signal to and from the microcontroller.   The Tom Igoe circuit just justs a 74 series chip to achieve the same thing.  If you're going to the trouble of an RS232, you might as well makes your life easier and do the full USB treatment as already suggested with the cheap Ebay adapter.

Schematic of the V2 serial Arduino. The original (V1) is officially redundant.

http://webzone.k3.mah.se/k3dacu/arduino/releases/serial_v2/arduino_rs232_v2.png

The bit at the lower left is the serial interface : 2 transistors and a handful of discreet components.
59  Using Arduino / Displays / Re: LCD drawing too much power? on: July 03, 2012, 04:24:39 am
A 200 ish ohm series resistor is within the current capabilities of an arduino digital pin even with whatever else is in circuit being a dead short circuit. It shouldn't reset the arduino whatever happens.  The 5V rail in the arduino is good for around 200 mA - it shouldn't have any issues with anything down to 33 ohms with a short circuit downstream of it.  Forget the LCD and connect the resister directly between 5V and GND.  If you've tried the resister in series and it still resets, then logically it will reset with just the resister, if that's the case you're got an iffy Arduino
60  Using Arduino / Project Guidance / Re: Query on Arduino without USB on: July 02, 2012, 09:24:09 am
This emulates the original serial Arduino. It wasn't RS232, but would work with most serial PCs.

http://arduino.cc/en/Main/StandaloneAssembly
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