Feeling Force with an FSR
by Matt Richardson
4) Wire up the Circuit
- Place the XBee adapter into the breadboard and wire up the power buses to each other.
- Connect the VCC terminal of the XBee adapter to the positive rail and the ground terminal to the negative rail.
- Connect the VREF terminal of the XBee adapter to the positive rail. This will give the XBee a reference for what voltage an analog sensor is working with.
- Connect one lead of the FSR to the positive voltage rail, and the other lead to pin 20 of the XBee. It doesn’t matter which sides of the FSR you choose, it’s not polarized. Place the resistor between ground and the FSR lead that connects to the XBee. This creates a simple voltage divider circuit.
- This is what the voltage divider looks like as a schematic diagram.
- Here’s how your circuit might look as laid out on a breadboard.
- Insert the XBee into the breakout board and connect the battery pack.
