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256  Using Arduino / Programming Questions / Re: ah man Noob asking a question again... on: July 09, 2014, 06:44:30 pm
Fentrac please use code tags.
I would add:
pinMode(buttonPin,  INPUT_PULLUP);
You are going to add some de-bounce code to filter out contact bounce.
257  Using Arduino / Motors, Mechanics, and Power / Re: How to prevent servos from breaking on: July 09, 2014, 06:14:56 pm
I have used servos from here:
http://www.hobbyking.com/hobbyking/store/__84__189__Servos_Parts-All_Servos.html
You have to consider what torque need of course.
258  Using Arduino / Project Guidance / Re: reading 24v input from multiple production presses on: July 09, 2014, 06:04:05 pm
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but if not then the optocoupler approach would enable you to keep them electrically isolated.
From what you describe, this is how I would do it.
259  Using Arduino / General Electronics / Re: Reading voltage - Product already exists?? on: July 09, 2014, 06:01:41 pm
The Arduino will do this, it has an A/D converter onboard.
What voltages do you need to measure?
260  Using Arduino / General Electronics / Re: Power jack for arduino prototyping on: July 09, 2014, 05:52:07 pm
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power the the processor with 12V DC.
+12 anode of 1N4007 cathode to 7805 regulator input, 7805 regulator output is +5V.
Of course you will power the 7805 with 12V and feed the o/p of the 7805 to the processor VCC(7) and AVcc(20) .
Aref(21) to 100nf to ground.
VCC(7) to 100nF to ground.
AVcc(20) to 100nF to ground.
261  Using Arduino / Programming Questions / Re: ah man Noob asking a question again... on: July 09, 2014, 05:31:17 pm
And your question is?
if (buttonPushCounter == 0);  <------- no ;
This isn't very functional.

Have you learned about "switch case"
262  Using Arduino / General Electronics / Re: Power Issue on: July 09, 2014, 05:28:40 pm
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what orientation
Yes, majenko, OP shows it backwards.

Use a 7805!
263  Using Arduino / General Electronics / Re: Using a 4 digit 7 segment display on: July 09, 2014, 05:23:39 pm
I always use the MAX7219 (can drive 8 digits however these are common cathode displays).
Very easy to use with https://www.sparkfun.com/products/12710
264  Using Arduino / General Electronics / Re: Etched copper PCB question on: July 09, 2014, 05:08:22 pm
Will you be using the toner transfer or the photographic method?

See:
http://www.electricstuff.co.uk/pcbs.html
http://www.instructables.com/id/pcb-methodes/
http://quinndunki.com/blondihacks/?p=835
http://forum.arduino.cc/index.php?topic=177629.0
http://forum.arduino.cc/index.php?topic=253310.new#new
https://www.sparkfun.com/tutorials/109
265  Using Arduino / Project Guidance / Re: Camera and storage system for arduino on: July 09, 2014, 02:57:04 pm
So you want: the Battery, Arduino, SD card and camera to fit into a altoids tin?
266  Using Arduino / Project Guidance / Re: Camera and storage system for arduino on: July 09, 2014, 02:40:26 pm
What have you found that fits the size you need?
What is your maximum size?
267  Using Arduino / Installation & Troubleshooting / Re: I think my Arduino Nano is internally short-circuited between 5V and Ground on: July 09, 2014, 12:47:04 am
Maybe the board circuit touched something metal.
268  Using Arduino / LEDs and Multiplexing / Re: Problem with CD74HC* Multiplexer/Demultiplexer on: July 09, 2014, 12:36:42 am
Are you saying if you select an input (which is high) then select another input (which is low) the pin on the controller is always high?
269  Using Arduino / General Electronics / Re: Circuit Correct? Help me! on: July 08, 2014, 06:57:08 pm
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You need a fly-back diode over an inductive load. Always.
When talking about DC of course.
270  Using Arduino / General Electronics / Re: External Power Source for Arduino Micro on: July 08, 2014, 06:02:08 pm
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Lefty
But how did you know?
I am left handed.
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