SparkFun will be closing today at 12pm MT for a company outing. All orders placed before 2pm MT will still ship out same-day. Thanks!
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December 11, 2010
News - In Which We Are Not Havin…
about 2 years ago
When you can, an idea on when you expect to be caught up would be lovely, but I suspect all of us can understand it being “It’ll ship when it ships” today :) Good to help you debug things, I’ve been there too, glad you have good co-workers :)
News - Happy Arduino Day!
about 2 years ago
They’ve seen that there is a problem and say they plan to fix it, so I hope they’ll take some back orders from me in a few hours - I was glad to see that as otherwise most things I wanted to get were already out.
about 5 years ago
Looks like you could even mount it on the edge of a PCB, with a little elbow grease; For prototypes that saves drilling some holes by hand.
Tutorial - Pull-Up Resistors
about 6 years ago
Another thing to point out is that the larger the resistance for the pull-up, the slower the pin is to respond to voltage changes. This is because the system that feeds the input pin is essentially a capacitor coupled with the pull-up resistor, thus forming a RC filter. And RC filters take some time to charge and discharge. If you have a really fast changing signal (like USB), a large pull-up can limit the speed at which the pin can reliably change state.
The -smaller- the resistance of the pull-up, the more effect it’ll have on the input signal, though; a pull-up is there to help the input signal to fall into the reading circuit’s logic levels, a 0.01 Ohm resistor would -really- mess up a USB input sighal, a 10Meg resistor would usually not do much for you.
Mark (The Bypass Cap Maniac LOL)
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