Show Posts
Pages: 1 [2] 3 4 ... 133
16  Using Arduino / Project Guidance / Re: Questions about Arduino on: October 28, 2012, 11:16:20 am
The chip in my home brew is mounted on stripboard, the chip is the same one used in most Deumilanove/Uno/numerous clones. The Leonardoi is surface mount and wouldn't fit, Surface mount is tricky on a small scale hobbyist level. At a push you can program the chip on a Uno, lever it out of the socket and stick in it your own board.  Its just about practicalities.....

The other picture shows it mounted on what I designed it for : mounting on a Raspberry Pi.
17  Using Arduino / Installation & Troubleshooting / Re: Complete newbie - completely thick - LED not lighting! on: October 28, 2012, 11:02:05 am
LED's are polarised. They need to be connected the right way round to work.  Plugging one into GND & pin 13 is not a good idea on an arduino made in the last 5 years (including the Uno). There is no current limiting resister in circuit. Its completely unnecessary any way, any arduino made in the last 5 years (The Uno)  will have one on board, already wired and working. Its usually labelled 'L'. The tutorial you've found is out of date and doing it today can damage the Arduino.  You may have already damaged the output on Pin 13.
18  Using Arduino / Project Guidance / Re: Questions about Arduino on: October 28, 2012, 10:26:46 am
Home brew Arduino fed directly fed with 5V.

Since the Arduino Leonardo chip is surface mounted it makes the above a bit tricky....

Mounted on a Raspberry Pi
19  Using Arduino / Installation & Troubleshooting / Re: Serial Port grayed out on: October 09, 2012, 10:57:01 am
Some nice person did this :

The troubleshooting section is your likely promlem, ie your user doesn't have rights to access the serial ports.
20  Using Arduino / Project Guidance / Re: Uncertain where to post this, is this coding correct? on: October 04, 2012, 04:36:51 pm
"Programming Questions ?"

I'm a big fan of 'if it does what you want, its right.'  smiley
21  Using Arduino / Installation & Troubleshooting / Re: My Arduino UNO getting extremely hot on: October 04, 2012, 04:31:53 pm
As I said in reply #1, if you haven't got anything connected to the Arduino, its sick.  You could try swapping out the 328 chip if its a removable one.
22  Using Arduino / Installation & Troubleshooting / Re: Asking for a pointer Install FTDI driver on Headless pox. on: October 02, 2012, 12:11:11 pm
I have a Seagate Dockstar which is the forerunner of the Goflex.  I hacked it and installed Debian on it from here :  Its more than capable of bricking your box but apparently it works on the Goflex as well.  Have a mosy on the linked forum.

The Debian has the driver for The Uno and Duemilanove built in. I get stuff out of the Arduino using Bash shell scripts using STTY and tail. 

 The Uno doesn't use FTDI drivers by the way.
23  Using Arduino / Networking, Protocols, and Devices / Re: Raspberry Pi to Arduino usb port issue on: September 29, 2012, 03:01:34 pm
Its a known issue on the Pi that it doesn't work with tty-serial adapters too well.  The USB implementation on the Pi is weak.

I get around it with my 'cheap arduino'

It connects onto the Pi's GPIO pins and I talk to it via /dev/ttyAMA0

I would have my doubts it would work trying to program it from the Pi though.
24  Using Arduino / General Electronics / Re: voltage divider and current for 23k256 on: September 29, 2012, 01:22:40 pm
I've used a simple RED LED in cases like this.  It will reduce 5V to something a 3.3V  chip will be happy with.  I also use a 680 ohm resistor to ensure the LED lights up.  That way I get my pilot light (power on) too.

Nice bit of thinking outside the box, provided you don't overload the LED by pulling too much current through it.
25  Using Arduino / Installation & Troubleshooting / Re: WHich USB cables do I need PLEASE!!! Mega ADK board. on: September 29, 2012, 12:33:42 pm
Excuse the old dinosaur, in the world he inhabits, the horse pulls the cart...........     

26  Using Arduino / Installation & Troubleshooting / Re: WHich USB cables do I need PLEASE!!! Mega ADK board. on: September 29, 2012, 11:08:23 am
Are you aware of the difference between a USB host and a USB device ?  You connect a host to a device, the arduino is a device so it needs connecting to a host, I have an android phone with a micro USB connector, it is also a device and is intended to be connected to a host (eg a PC). It cannot be connected to another USB device such as an Arduino.  Some tablets can be used as USB hosts (and many cannot) , but they usually have either the familiar rectangular socket as used on PCs or a proprietry connector intended to be used with their cable.  
27  Using Arduino / Project Guidance / Re: DS18B20 Temp sensor not working with arduino? on: September 24, 2012, 12:36:35 pm
A properly connected DS18B20 uses next to no power.  It its getting warm it is wrongly connected and/or possibly cooked....
28  Using Arduino / Installation & Troubleshooting / Re: Switching from USB power to Vinn cause troubles... on: September 19, 2012, 08:34:57 am
The analog read gives a value that is dependant on the analog reference which is usually your supply voltage.  When powered by external voltage, it will be very close to 5 volts because of the onboard regulator. When its powered from USB it takes the voltage of the USB in the computer, which from experience can be a long way out. (4.7 volts isn't unusual) so the value read will change.
29  Using Arduino / Microcontrollers / Re: Setting up a really bare bones arduino on: September 07, 2012, 04:08:25 pm
Back to the OP, there is a product called the RBBB arduino sold as a kit by Modern Device.

It probably represents the practical minimum you can take an arduino down to without hitting problems.  A lot cheaper than a Uno but you need some form of external USB-ttl adapter to program it.  Quite fun to build even if you're a noob with a soldering iron.
30  Community / Bar Sport / Re: Raspberry Pi launch farce on: September 07, 2012, 03:16:38 pm
You can't hate the Pi that much if you've bought another......

I bought my second as well, You get to know its peculiar ways.......

Rev 2 board with unfinished prototype realtime addition......
Pages: 1 [2] 3 4 ... 133