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1  Using Arduino / General Electronics / Re: Pull-up resistors on: July 02, 2013, 08:43:59 am
Right, but in the diagram, the switch connects the INPUT pin to GND and the resistor is between V5+ and the INPUT pin. On my arduino, I connect the switch between V5+ and INPUT pin and then enable the pull-up resistor which I am guessing exists after the input pin. This is opposite of what is in the diagram...
2  Using Arduino / General Electronics / Re: Pull-up resistors on: July 02, 2013, 08:12:41 am
HOw does the arduino pull-up resistor circuitry differ from that diagram?
3  Using Arduino / General Electronics / Pull-up resistors on: July 02, 2013, 08:04:57 am
If I connect a switch to the arduino and enable the built-in pull-up resistor on the input pin, how does that circuit work? I thought for a pull-up resistor, the switch had to connect the INPUT pin to GND and the resistor connected +5V to the INPUT pin like the image below. Since the switch is before the INPUT pin, isn't it a pull-down resistor?

Thanks

http://www.seattlerobotics.org/encoder/mar97/basics1.gif
4  Forum 2005-2010 (read only) / Troubleshooting / Re: USB port not found on: October 27, 2010, 05:53:29 pm
Ive been having the same problem.  It did not work with any software version.  Then it started to work for a while, and now, it doesn't work any more.
5  Forum 2005-2010 (read only) / Troubleshooting / Arduino software does not recognize USB on: October 25, 2010, 08:28:32 pm
Hello,

I am having difficulty with my software not recognizing the USB port on my computer.  I am running OSX 10.6.4.  I am using an arduino mega, the old one, MEGA1280. I have installed the latest version of the software, 0021. Please help me.  Thanks.

Thanks,

Aedhan
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