This repo contains info and details about the first project done under Robodive program by Arsh and Chinar mentee group . This project is designed to automate gameplay in the Chrome Dino game by detecting obstacles and triggering the spacebar for the Dino to jump. The Step-wise process to make the project is as follows -
🎯Step 1: Gather the Components reuqired for the project which are listed below -
1.Arduino UNO
2.2 x 10KΩ Resistors
3.Servo Motor (Micro Servo 9g SG90) (DataSheet - https://trudyo.com/wp-content/uploads/2023/01/SG90-9G-Servo-Motor-
Datasheet.pdf)
4.2 x Light Dependent Resistors (LDRs)
5.Breadboard and Jumper Wires
6.Servo Arm
Main Components and their use are : -Light Dependent Resistors (LDRs): To distinguish between background and obstacle. -Servo Motor: To physically hit the spacebar.
🎯Step 2: Setup the circuit to get reading from the photoresistor and note down the reading range and threshold value for dark and light parts- -Connect one leg of the LDR to the 5V pin on the Arduino. -Connect the other leg of the LDR to analog pin A0. -Connect a 10KΩ resistor between the LDR leg (connected to A0) and GND.
Test and record the analog readings for different scenarios:
Threshold Value = (Background Value + Obstacle Value)/2
Day Mode: Background (~800), Obstacle (~680), Threshold Value (~740) Night Mode: Background (~650), Obstacle (~280), Threshold Value (~465)
Since the Analog pins of arduino measure Voltage and not resistance where the voltage should be of the range 0-5V hence the LDR is added to a voltage divider circuit such that depending on the variation in resitance of LDR due to light , voltage variates and an external resitance is added such that Voltage variation remains in between limits of 0-5V .
Since the Resistance offered by LDR ranges from 1-75kohm hence a resistance of 10kohm is ideal to make the Vout ranging from 0.45V to 4.4V.
Formulation for Voltage divider has been attached in form of an image .
🎯Step 3: Build the actual circuit and write Code for it : Connect the components as follows: -LDR1 (Obstacle Detection): Connect to analog pin A0 with a 10KΩ resistor. -LDR2 (Ambient Light Detection): Connect to analog pin A1 with a 10KΩ resistor. -Servo Motor: Connect to digital pin 9. -Power the circuit using the Arduino.
Circuit image has been attached to this readme file .
Code Implementation The Arduino code processes inputs from LDRs and controls the servo motor accordingly. Below is a brief explanation of the code:
Setup Phase: Initializes pins and sets up serial communication. Loop Phase: Continuously reads LDR values and determines: -Day or Night Mode based on LDR2 values. -Presence of an obstacle using LDR1 values.
Code file has been attached differently.
🎯Step 4: Final Assembly -Assemble the circuit on a breadboard. -Attach the servo arm to the spacebar. -Upload the code to the Arduino and test the setup.
Summary on how it works : -Obstacle Detection: LDR1 identifies obstacles based on brightness contrast. -Day/Night Mode: LDR2 adjusts thresholds for detection based on ambient light. -Servo Actuation: The servo motor hits the spacebar to make the Dino jump.
Demonstration(Video of Working Model) : https://drive.google.com/file/d/1vrDwBAlGkw_YuiGm2M2biwRv-A-Wetxp/view?usp=drive_link