In this tutorial I am going to post the step-by-step procedure to make a simple Object Tracking Bot. The main aim of this Bot is to follow the objects which are shown to it in 3D space i.e., x, y and z – axis (horizontal, vertical and forward & backward). This bot behaves just like a little doggy. This bot tracks the objects with 2 DOF (Degree Of Freedom). The two motors provide the Horizontal, Forward and backward movement, The Servo Motor which holds the Compound Eye (Sensor) provides the Vertical movement. So, the Bot can follow the Object in 3D space. To sense the objects and track it this bot uses an IR Compound Eye sensor, which is built using four 5mm IR LED’s and eight 5mm Photodiodes. You can find the performance of the Object Tracking Bot from the below YouTube link
- Gather the required materials.
- Making of Sensor (IR Compound Eye).
- Building Motor driver circuit.
- Programming the Arduino.
- Assembling the Bot and
- Arduino Microcontroller board
- IR LED’s (four)
- Photodiodes (eight)
- Servo motor (one)
- L239D Motor driver IC (one)
- Universal PCB
- DC geared Motors (two)
- Castor ball (one)
- Solid core wires (few)
- Soldering rod and soldering wire
- 9 Volt Batteries (two)
- Double sided tape or any adhesive
After gathering all the required materials and tools let’s move on to next step.
Step-2: Making of Compound Eye (sensor) –
The Compound Eye sensor used in this bot is built using four IR LED’s and eight Photodiodes. The idea and design of the compound eye sensor was taken from ……………………….. Here is the link to his site ………….. .
You can buy this sensor from Stores or make it yourself. From the reference of above site I had made a similar sensor with some modifications, the circuit I had used for my sensor is different from the original one and I had used Photodiodes instead of Phototransistors.
The circuit diagram of my (modified) sensor is below –
For more detail: Object Tracking Robot