RedBot Sensor - Wheel Encoder
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HelloTechie, 
SFUptownMaker 
Assembly
We will be placing screws that will later hold the RedBot Sensor - Wheel Encoder to the bottom chassis.
Locate the following:
- 1x Bottom Chassis Piece
- 2x 4-40 3/8" Phillips Screws
- 2x 4-40 Hex Nuts
Locate the two positions on the bottom chassis piece where the 4-40 screws will go. In this step, it doesn't matter what side you use, since both sides of the chassis are indential.
Place one of the 4-40 screw through the chassis piece in the correct location. This side of the chassis piece will now be your bottom side.
Tightly screw down the 4-40 hex nut on the top side of the chassis piece to hold the 4-40 screw down.
Place the second 4-40 screw and nut in the second located position on the chassis piece. You will want to place the 4-40 screw through the bottom side of the chassis. Then screw in the 4-40 nut on the top side of the chassis.
Adding RedBot Wheel Encoder
Locate the following:
- 1x RedBot Sensor - Wheel Encoder
- 2x 4-40 Hex Nuts
With the six pin male header side on the RedBot Sensor - Wheel Encoder facing upwards, place down the encoder on the top side of the bottom chassis piece where the 4-40 screw are. Pay close attention that the six pin male header side is also closest to the front side of the chassis. Using two 4-40 hex nuts, tighten down the RedBot Sensor - Wheel Encoder on the top side of the bottom chassis piece.
Connecting the Wheel Encoder the the RedBot Mainboard
Add four jumper wires to the RedBot Sensor - Wheel Encoder. There should be a jumper wire each one of the following pins: OUTB, OUTA, VCC, and GND. You can then connect the jumper wires to the following pins on the RedBot Mainboard.
SparkFun RedBot Sensor - Wheel Encoder → RedBot Mainboard
- OUTB → A2
- OUTA → 3
- VCC → 5V
- GND → GND