Hardware Reference
In-Depth Information
Resistors
We use 220 Ω, 1 kΩ, 4.7 kΩ, 10 kΩ, 20 kΩ, and 22 kΩ resistors in this topic. All are 0.25
W. The easiest way to get all these, and many more, is to order SparkFun's Resistor Kit . It's
a great way to be ready for future projects, because it has 500 resistors. RadioShack's
500-piece Resistor Assortment is a bit more expensive, but it has a wider variety of resist-
ors.
If you don't need an entire kit of resistors, you can order a la carte from a number of places.
RadioShack has 5-packs , and DigiKey has more than a quarter million through-hole resist-
ors at good prices, but make sure you are ordering the right one.
You can find the 10 kΩ trimpot (or variable resistor) at SparkFun , Adafruit , or RadioShack .
Flex resistors (sometimes called flex sensors or bend sensors ) are available at SparkFun
and Adafruit .
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