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In Pico Graphic programming tutorial lesson 1,  we learned how to set up Pico to work with Google Chrome Browser and use Website to make a simple blink program. Users will know some basic programming blocks from Chip and Loops categories, including  START, Repeat Forever, Turn Pin On/Off etc.

In this lesson, we will make a little bit more complicated program and use a push button to turn On/Off an external LED. We will learn a new programming block from the Logic category.

  1. Raspberry Pi Pico board and microUSB cable
  2. A computer to run Thonny Python IDE
  3. A breadboard
  4. LED x 1 pc
  5. 220 ohm resistor
  6. Push button x 1 pc
  7. Some jumper wires

In above circuit graph, you can see that:
LED negative pin connected to GND
LED Positive pin connected to GP15 through 220 ohm resistor
Push button pin 1 connected to 3.3V
Push button pin 2 connected to GP14
After you assembly above circuit, we can start a new project in .

Step 1: Create a New Project and Connect the Pico to Serial Port

1)Click New Project icon, you will see a My project icon with a fancy name will pop up.
2)Click the new icon   in My Projects

3)Now you will enter a new graphic programming page. Please click CONNECT Button in the bottom of the page and connect your Pico board to your project,Then your browser will pop up a Serial Port option menu, please select Pico from the menu and click Connect button;

If you can not see Pico in the Serial Port menu, it means your Pico is not setup properly. You need go back to Lesson 1 Step 1 and setup Pico again.

After you connect Pico to Serial Port, your GUI Connect button will switch to Disconnect button as following:

Step 2: Build Graphic coding chips

1)Click Chip -> Start , then move Start chip to coding area as following :

2)Click Loops -> repeat while true and move this block  just below start block as following:

3)Click Logic -> if do else and move inside repeat while true block as following:

4)Click Chip -> is Pin condition block and move inside  if do else block condition area, then change Pin 0 to Pin 14, change LOW when pulled UP to HIGH when pulled DOWN as following:

Explanation: this is “Pin 14 HIGH when pulled DOWN”   block has two functionalities:

  1. When push button has no signal come to Pin 14(floating), Pico will automatically set input value to LOW
  2. When push button is pressed and connect Pin 14 to 3.3V, the input will be HIGH and enable action in do area

5)In Chip category, add two more turn pin blocks to GUI,  and move them to do area and else area. Change pin number from 0 to 15, change else area ON status to OFF status, see following picture.

Now all we have finished building graphic program for this lesson, simply click Start button to run the program.

Test the program

Now push the button in your bread board, the LED will turn on, when you release the button, the LED will   turn  off.

Learn More about parts SKU:2021005900

No. Picture Product Name Link
1 Raspberry Pi Pico Board
2 Servo motor
3 Infrared Sensor Module
4 RFID Module and card
5 Push Buttons and Hats
6 LED(6 x White, 6 x Red, 6 x Yellow, 6x Green)
7 Servo motor
8 Piezo Buzzer Module
9 I2C LCD Display(16×2)
10 Philips Screwdriver
11 Solderless Prototype Breadboard
12 Potentionmeter (10K adjustable resistor)
13 40Pin M to M Jumper Wires
14 20Pin M to F Jumper wires 15cm