Dear Instructables readers and esteemed judges. Me and my project Partner have built a purpose built vehicle by using An Arduino and two continuous rotation servos. We are High School Students who made this as a end of the year project in our engineering class. Please keep this fact in mind when reviewing our project.
Project A.P.O.R.V is a Arduino Powered Off Road Vehicle. Its main job is to be able to overcome uneven terrain, something that many vehicles cannot do especially well. It uses 4 large sized wheels to let the vehicle be able to travel on either side, so it won't matter if it is on either side.
Although we set it so our project is FWD (Front Wheel Drive), it can very easily by changed to RWD by adjusting the code in the Arduino program. We also used a switch to make it so that we can turn the vehicle on and off just by flipping the switch , rather than having to unplug and plug in a battery every time.
Step 1: Materials and Tools
Arduino Uno Breadboard
6 Medium Sized Rubberbands
1 9V Battery Breadboard Wires
2 SpringRC SM-S3317SR Servos
4 Servo Mounting Adapters
Arduino And Breadboard Harness
Tools: Xacto Knife
Flat Concrete Surface OR Sander
Step 2: Method to Build
1. Use a screwdriver to pry the Arduino out of the Arduino harness (the Arduino harness is the black board that the breadboard and the Arduino itself is attached to. You can DIY and use a piece of wood to do this as well). Pay special attention to make sure that you do not damage the traces on the PCB or the PCB itself.
2. Use 2 of the 6 medium sized rubber bands to attach the Arduino onto the other side. Position the arduino so there is clearance for the battery input port on the Arduino itself. You will need to have a space large enough for the wire to pass through in between the wheels
3. Take the Balsa wood and cut out 4 rough circles with a diameter of 3 inches. After you have cut these out, sand them all down to make a smooth surface across the edges. Do this by using a flat concrete surface or a sander if you have access to one.
4. Take the battery and secure it to the the Arduino Harness by using the same rubber bands that you used before.
5. Grab two servos and glue them on either front corners. Program both servos with Arduino and glue all servo mounting adapters on 4 wheels. Equip 2 wheels on both servos.
6. Carve a piece of balsa wood with the same width of the Arduino and breadboard harness. Make holes on either side by inserting nails in the balsa wood. Insert two nails in the servo mounting adapters and the two holes on the balsa wood. Tape the balsa wood on the opposite side of the servos.
7. Plug in the battery harness into the arduino and secure it onto the arduino harness by using the rubber bands.
8. Plug in the switch onto the breadboard and wire it up with the arduino so you can control the power delivery to the servos.
9. Plug in the servos into power, ground, and data with the arduino.
10. Flip the switch and prepare yourself...