Cart and Track
This page describes how to set up a cart and track for motion experiments.
The kit includes the following materials:
- laser-cut acrylic parts for cart
- axles and connector hardware
- IR reflective sensors
- two one-meter Grove cables
- laser-cut acrylic parts for sensors
- screws for mounting sensors
- screws for mounting track
- small allen wrench for adjusting wheel separation
The kit requires the following items (not included):
- tape measure
- small phillips screw driver
- standard phillips screw driver
- small towel
- a piece of 8-foot 2x4 lumber (about 4x9x250cm)
- a section of electrical conduit with an outside diameter of 7/8 inches (about 2.2cm)
- weights for cart experiments (we use this metric weight set; alternatively you can use nuts/bolts/washers from a hardware store as weights)
The wood and electrical conduit can be obtained for under $10 from a hardware store.
Prepare your Arduino
- Attach the provided rubber feet to your Arduino.
- Attach the Grove shield to the Arduino. Be sure that the pins line up with the sockets.
Assemble the Cart
Note: if your laser-cut parts have paper covering, use a knife to peel it off.
Place the laser-cut panels in the center of the cart:
Assemble the Sensors
Assemble the Track
If needed/desired, cut the electrical conduit to the same length as the wood.
Mount the conduit on the wood using the provided screws. Place the screws so they are tightly holding the conduit; the conduit should not slide or otherwise move once attached.
Mount the sensors onto the track using the provided screws. The sensors should be 1 meter (about 39 and 3/8 inches) apart, center to center.
Place a towel at the downhill end of the track to help stop the cart.
Using the Kit
If you have any trouble, email firstname.lastname@example.org.