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Lab2b_Proposal

Siyun Wang

[e-mail]

test on: Tested on: DELL Inspiron 5505, Windows 10

In this part, we used LED, 1kΩ resistance, breadboard and STEMMA QT. And we used STEMMA QT as input with GPIO 22.

code

    #include "pico/stdlib.h"

    int main() {
    #ifndef PICO_DEFAULT_LED_PIN
    #warning blink example requires a board with a regular LED
    #else
    const uint LED_PIN = 22;
    gpio_init(LED_PIN);
    gpio_set_dir(LED_PIN, GPIO_OUT);
    while (true) {
            gpio_put(LED_PIN, 1);
            sleep_ms(250);
            gpio_put(LED_PIN, 0);
            sleep_ms(250);
            }
    #endif
    }

result

outline

Since there are several GPIO pins on the QT-PY 2040, they can be used as I/O ports. I plan to use several GPIO pins to drive several different color LEDs. My idea is that I can design a traffic light that can change red, green and yellow colors. Red and green light color 10s, yellow light 5s. And the reason that I think my design is cool is that it can be used in real life and has strong practicality.

component

LED, 1kΩ resistance, STEMMA QT

question

1. How to control the LED brightness change, or how to control the LED brightness slowdown proces？

Update on Oct.31st

component

RP2040, APDS9960, 510 Ohm resistor, LED, Protoboard, Wires

peripheral

GPIO, I2C1

outline

Our work is an alarm that detects distance.