KY-027 Magic light cup

int Led = 13 ;// Declaration of the LED output pin
int Sensor = 10 ;// Declaration of the sensor input pin
int val; // Temporary variable
  
void setup ()
{
  pinMode (Led, OUTPUT) ; // Initialize output pin
  pinMode (Sensor, INPUT) ; // Initialize sensor pin
  digitalWrite(Sensor, HIGH) ; // Activate internal pull-up resistor
}
  
void loop ()
{
  val = digitalRead (Sensor) ; // The current signal at the sensor is read out
  
  if (val == HIGH) // If a signal could be detected, the LED is switched on.
  {
    digitalWrite (Led, LOW);
  }
  else
  {
    digitalWrite (Led, HIGH);
  }
}

The LED is switched on or off in the event of vibration. The trigger signal, which controls the LED, is additionally forwarded to the signal output.

Presistor:

Depending on the input voltage, series resistors are required.

Series resistor (3.3 V) [Red]	120 Ω
Series resistor (5 V) [Red]	220 Ω

Pin assignment

Code example Raspberry Pi

Pin assignment Raspberry Pi

Raspberry Pi	Sensor
GPIO 23 [Pin 16]	Signal
5 V	+V
GND	GND
GPIO 24 [Pin 18]	LED

Programming example in the Python programming language.

# Required modules are imported and set up
import RPi.GPIO as GPIO
import time
   
GPIO.setmode(GPIO.BCM)
   
# Here the two pins are declared, to which the sensor and the LED are connected,
LED_PIN = 24
Sensor_PIN = 23
GPIO.setup(Sensor_PIN, GPIO.IN)
GPIO.setup(LED_PIN, GPIO.OUT)
   
print ("Sensor test [press CTRL+C to end test]")
   
# This outputFunction will be executed when a signal is detected
def outputFunction(null):
        GPIO.output(LED_PIN, True)
   
# When a signal is detected the output function is executed
GPIO.add_event_detect(Sensor_PIN, GPIO.FALLING, callback=outputFunction, bouncetime=10) 
   
# main program loop
try:
    while True:
        time.sleep(1)
        #output is reset if the tilt switch is tilted to the other side again
        if GPIO.input(Sensor_PIN):
            GPIO.output(LED_PIN,False)
   
# Clean up after the program is finished
except KeyboardInterrupt:
    GPIO.cleanup()

Download sample program

KY027-RPi.zip

To start with the command:

sudo python3 KY027-RPi.py

# Load libraries
from machine import Pin, Timer

# Initialization of GPIO26 as input | Initialization of GPIO18 as output
sensor = Pin(26, Pin.IN, Pin.PULL_DOWN)
LED = Pin(18, Pin.OUT, Pin.PULL_DOWN)

# Timer initialization
timer = Timer()
# Variables initialization
var = 0

# Function: LED is switched ON/OFF
def step(timer):
    global var
    print("vibration")
    if var == 0:
        LED.value(1)
        var = 1
    else:
        LED.value(0)
        var = 0

# Function: After triggering the interrupt the timer is triggered to execute the step() function.
def shake(pin):
    # Debounce function: Set timer
    timer.init(mode=Timer.ONE_SHOT, period=100, callback=step)

# Initialization interrupt
sensor.irq(trigger=Pin.IRQ_FALLING, handler=shake)