Arduino
This kit is based on the Lets Make Robots V3 Robot - see >HERE< for details
 
 

1. Make the front Axle

 
Requires 1 craft stick and 2 wheels (left and right handed mountings)
 
  • Take one of the craft sticks and square off one end.
  • Cut 8cm length
  • Drill a 4mm diameter hole in the front corners (4mm from each side)
  • Use hot-melt glue-gun to stick the left and right front wheels
 
 
 2. Connect the Steering Servo
  • Mark the mid-point of the8cn craft stick
  • Glue the servo on at the mid-point
  • Servo horn should point downwards at the rear of the craft stick
 
 
3. Make the Rear Platform
 
This part holds the motor, battery box, Arduino and Motor Shield
 
  • Attach the wheel to the motor (on opposite side to metal contacts)
  • Cut one craft stick to 10cm, leaving the curved end
  • Glue the straight-cut end on top of the motor, with the curved end point forwards
  • Cut another craft stick to 9.5cm
  • Glue the twocraft sticks together using off-cuts. Note that the second (9.5cm) craft stick should be directly in line with the wheel

 
4. Make the attachment for the Arduino and Motor Shield
 
You will need the round Servo horn, battery case and some more craft sticks
 
  • Glue the battery pack in place (at front of the two-sticks)
  • Glue a full-length craft stick onto the top of battery case
  • Cut an off-cut to 5cm (with curved end)
  • Glue the 5cm off-cut to the full-length craft stick. Ensure that it is in the correct place for mounting the Arduino
  • Place an Arduino over the two sticks and mark the 2 mounting holes as shown
  • Drill a 2mm pilot hole in each mounting position
 
5. Attach Arduino and Motor Shield
 
 
  • Use the two small self-tapping screws to fix the Arduino Uno
  • Do not over-tighten as the board will bend
  • Solder three 6-way header strips to the motor shield as shown
  • IMPORTANT: Remove and throw away the jumper labelled PWR on the motor shield (near the power terminals)
  • Carefully plug the motor shield onto the Arduino
 
6. Connect The Front and Rear Frames together and add Ultrasonic sensor
 
  • Ensure that the servo is in its mid position by gently turning the shaft
  • Push the servo shaft into the servo horn
  • This makes a good friction fit, but you may want to screw it in place also. To do this you should drill a hole in craft stick
  • Glue the ultra-sonic sensor to the front of the servo, resting on the lip
 
7. Add Noise suppressor and wires to Motor
 
  • Solder the 100mF capacitor (orange blob marked 104) across the motor terminals
  • Solder the 2-core white cable to the motor terminals
 
8. Complete the Wiring
 
  • Plug the servo cable into SER1 plug, ensuring the Black wire is in the corner of the board as shown
  • Connect the Ultra-Sonic sensor using the Female-Female wires provided:
    • Vcc goes to the +5
    • Trig goes to A0
    • Echo goes to A1
    • Gnd goes to Gnd
  • Connect the black wire from the battery box directly to the GND terminal on motor shield
  • REMOVE and THROW AWAY the jumper on the PWR - leaving this on WILL damage the Arduino
  • Cut the Male-Female wire provided in two pieces:
    • Connect one bare end to the Red wire from the battery box
    • Connect the other bare end to the +M terminal on motor shield
    • You can now use the Male-Female jumper as a crude switch to turn off motor power
  • Connect the Arduino power connector to the M+ and GND terminals on Motor Shield
  • Take the twin-core wire from the motor and connect to the 2 M4 terminals on the motor shield
 
The Completed Robot
 
  • Add in 6 good quality AA batteries. We prefer Energizer Rechargeable Extremes
  • Install the Adafruit motor shield library from this link
  • Download some demo code from >HERE<
  • Switch it on by plugging together both halves of the Male-Female wire
  • Watch it try and avoid obstacles
  • Then....
  • ... improve the code! I'm sure there are plenty of bugs and improvements that can be made
  • Do let us know how you get on