Hardware Reference
In-Depth Information
Figure 1-4. Fabric in an embroidery hoop
Conductive Thread
Conductive thread is a flexible, sewable fiber made (in part or
whole) of metal, and is used to conduct power and digital sig-
nals in many wearable electronics. There are two main types: sil-
ver plated nylon, which tarnishes over time and loses conductiv-
ity, and stainless steel fiber, which is entirely metal throughout
and does not oxidize nearly as easily as silver. All conductive
thread has resistance greater than wire, which means that
across long distances it loses power. So, depending on your
project and circuit, you may wish to double or triple up the
thread to increase its power delivery to your components
( Figure 1-4 ).
Keep your stitches small and snug throughout your circuit to
prevent unintentional shorts. Keep power and ground lines far
apart from each other. A short between power and ground will
prevent your project from working and may even cause your
battery to heat up. Check your circuit for shorts after finishing
each path in your circuit. This way, if you do discover a problem,
you will know the likely location of the stray thread/short circuit.
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