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