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856  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Voltage Drop Across Resistors. on: September 21, 2010, 02:05:25 pm
Good luck!

Newer iPods and iPhones seem to make charging as difficult as possible.

Make sure you find instructions for your exact phone model, as they all seem to be different.

But yes, you need a potential divider to give the 'mode' voltage to turn charging on.

You don't want an iPod breakout connector do you? Its yours for a small fee smiley-wink
857  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Mechanical Prototyping on: September 19, 2010, 04:42:38 pm
I use cardboard, bits of plastic from drinks bottles etc, wood, anything that I can find around the house really. Plastic bottle tops make decent wheels and washers.
858  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Help PWM on: September 19, 2010, 04:38:46 pm
You can use a transistor to increase the size of your PWM signal, like this:

npn transistor say a BC458

1K resistor from +10V to the collector
emitter to GND
base to a 1K resistor to the PWM signal from the Arduino
connect the collector to the PWM input to the PSU.

Note that the transistor will invert the signal, so you will have to set the PWM output to 255-x rather than x. Where x is the desired output.
859  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: switch... case 0, 2, 4, 6, 8: on: September 16, 2010, 01:06:42 pm
would do such a thing smiley-wink
860  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: switch... case 0, 2, 4, 6, 8: on: September 16, 2010, 01:06:23 pm
anyone
861  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: switch... case 0, 2, 4, 6, 8: on: September 16, 2010, 01:06:09 pm
as if
862  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: switch... case 0, 2, 4, 6, 8: on: September 16, 2010, 03:58:08 am
Sadly, thats one nice feature of VB that is not in C.

You'll probably end up using ifs and else ifs.
863  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: switch... case 0, 2, 4, 6, 8: on: September 16, 2010, 03:48:14 am
No, I think you can only have value.

If this is exactly what you want to do then,

Code:
if (menuActual % 2)
{
  // do even stuff
}
else
{
  // do odd stuff
}

864  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: How to save a program from arduino to PC? on: September 13, 2010, 09:19:42 am
If its code that you have the right to, then just ask for the source code.
865  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Servo help... on: September 05, 2010, 02:48:47 am
Sorry, I've got to ask.

What is the application?
866  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: The new guy has a question!! on: August 20, 2010, 03:17:17 pm
HA! Another opportunity to plug my new book!

30 Arduino Projects for the Evil Genius - Simon Monk.
http://www.arduinoevilgenius.com

This has projects that illustrate sensing, displaying driving motors / servos etc.

It explains how the electronics work pretty much from first principals. Ditto the programming.
867  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: What should I order from Digi-Key? on: August 20, 2010, 10:19:57 am
A present for your patient partner who lets you spend your time on this stuff.

Or, a present for a would-be partner, who may make you want to stop doing all this.
868  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Getting Started on: August 20, 2010, 09:32:47 am
I would like to add to the list:

30 Arduino Projects for the Evil Genius - Simon Monk.
http://www.arduinoevilgenius.com

This has projects that illustrate sensing, displaying driving motors / servos etc.

It explains how the electronics work pretty much from first principals.
It doesn't even assume that you know Ohm's law.

But then I'm biassed. Seriously I did have people like you in mind when I wrote it.
869  Forum 2005-2010 (read only) / Bar Sport / Re: etching pcb at home (any suggestions)? on: January 23, 2011, 03:56:21 pm
Yet another PCB making tutorial. But this includes a UV LED light box.

http://dl.dropbox.com/u/3993179/pcbs.pdf
870  Forum 2005-2010 (read only) / Bar Sport / Arduino or Clone? which do you have most of? on: November 10, 2010, 05:33:47 pm
With such cheap clones on eBay, how popular are the official boards?
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