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Step 2Make FSRs
The interface to this device consists of four force sensing resistors. They can be anywhere from about 2x2 cm to 4x4 cm. If they're bigger, just make sure the wire is longer.
Plusea makes some really cool DIY FSRs, but I used my own style, because I don't have the same materials available. For Plusea's FSRs, you're working with around 200 ohms - 200 kiloohms max. For mine, you're working with 5-15 megaohms max. Commercial FSRs are in a similar range (e.g., this one is around 20 megaohms without a load). This maximum resistance is important to keep in mind when you're selecting capacitors.
Plusea makes some really cool DIY FSRs, but I used my own style, because I don't have the same materials available. For Plusea's FSRs, you're working with around 200 ohms - 200 kiloohms max. For mine, you're working with 5-15 megaohms max. Commercial FSRs are in a similar range (e.g., this one is around 20 megaohms without a load). This maximum resistance is important to keep in mind when you're selecting capacitors.
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