Traffic Light with Mblock

 We will make a traffic light application with the Mblock program. Before moving on to the codes, the list of materials we will need in our traffic light circuit:

 1-Arduino Uno

2-BreadBoard

3-3 LEDs

4-3 pieces of 220Ω Resistor

5-Jumper Cables

We need supplies.

 

Note: We need LEDs that give red, yellow, green light. If you are going to use white colored leds, you need to identify the leds that give the above 3 colors one by one before the application.

We add 220 ohm resistors to the long leg of the LEDs we add to our breadboard. We connect one leg of the resistors with a jumper cable to the digital pins 2,3,4 on our ardunio uno material (I connected the green led to the digital pin 2, the yellow led to the number 3, and the red led to the number 4). We connect it to the GND (negative) terminal. The circuit diagram is given below.

Now let's come to our codes in mBlock;

In the Mblock program, we add the Arduino program starter code from the Robots menu. After adding the code of repeat continuously from the control menu, we add the code to whichever digital pin we connected our led to from the "Robots menu... Set pin high, set digital pin no. 3 low, set digital pin no. 4 low, we only light up our red led, our other 2 leds do not light. With the 10 second wait code we added in this event control menu, the red light will turn on for 10 seconds, the green and yellow leds will not light up. After 10 seconds, we make the digital pins 4 and 3 high so that the red and yellow leds light up together for 2 seconds. Then, by making the digital pin 2 high, we make the green led light up for 5 seconds. We make the other 2 leds go down by making them low. The last operation is The yellow and green leds are turned on together, after that, the operations return to the beginning with the repeat code and this event will be repeated continuously. In order for us to run these codes, after connecting our arduino board and circuit to the computer with a usb cable, we first select the Serial port from the Connect menu, let's choose the port to which our arduino board is connected from there. By pressing the Upload to Arduino button, we send the codes we wrote to our Arduino board and upload them. Thus, our program becomes ready to run.

To download the source code of the program CLICK HERE

 

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