In this post, I’ll describe how to change the color of an anode RGB LED with a potentiometer. I’ll be using an Arduino UNO, and components from this RadioShack components kit. The motivation for this post was to have an LED change color in response to the reading from a thermistor next to my stove, but when I read about how I’d first need to calibrate the thermistor with some kind of thermometer, my motivation scurried under the sofa like a terrier in a thunderstorm. As a compromise I substituted the thermistor with a trim-pot, reasoning that a variable resistance was a variable resistance.
Continue reading Controlling an RGB LED with a Potentiometer →
I didn’t finish the two posts I was editing this week, but I did draw a shoddy Arduino in GIMP with a Wacom tablet that you can use if you’d like. Below are PNG and XCF files with white and transparent backgrounds.
![](https://0186fa.p3cdn1.secureserver.net/img/arduino_wbg.png)
PNG, white background
PNG, transparent background
XCF, white background
XCF, transparent background
I bought one of the Arduino Sidekick component kits from RadioShack this weekend and I’d like to build a few circuits with those parts over the next few posts. I’ll be using Mike Margolis’ Arduino Cookbook which is the best text on tinkering with Arduinos that I have found, and I highly recommend it.
Continue reading Wiring a Tilt Switch →
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