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åè·¯å³ïŒïŒããã«ããã©ããã©ã³ãžã¹ã¿ã黿ºã«æ¥ç¶ããããªã¬ãŒãå¶åŸ¡ããŠããåè·¯å³ãæ³åããŠãã ãããïŒ
åäœïŒãã©ããã©ã³ãžã¹ã¿ã«å ãåœãããšå°éãããªã¬ãŒã®ã³ã€ã«ãå±ç£ããŸãããã®åŸããªã¬ãŒã®æ¥ç¹ãåãæ¿ãããè² è·ãå¶åŸ¡ããŸãã
ãã€ã¯ãã³ã³ãããŒã©ïŒArduino, Raspberry PiïŒãšã®é£æº
ArduinoãRaspberry Piã®ãããªãã€ã¯ãã³ã³ãããŒã©ã¯ãå ã»ã³ãµãŒããã®ä¿¡å·ãåŠçããå ã¬ãã«ã«åºã¥ããŠä»ã®ããã€ã¹ãå¶åŸ¡ããããã«ãã䜿çšãããŸããããã«ãããããè€éã§èªååãããã·ã¹ãã ãå¯èœã«ãªããŸãã
Arduino
Arduinoã¯ãããã€ã¹ããããããã§ãã·ã§ãã«ãŸã§åºãå©çšãããŠãããã©ãããã©ãŒã ã§ããããã°ã©ãã³ã°ã容æã§ããµããŒãããªãœãŒã¹ãæäŸããå€§èŠæš¡ãªãŠãŒã¶ãŒã³ãã¥ããã£ããããŸããå ã»ã³ãµãŒãArduinoã«æ¥ç¶ããã«ã¯ãã»ã³ãµãŒã®åºåãArduinoã®ã¢ããã°å ¥åãã³ã®1ã€ã«æ¥ç¶ããŸãããã®åŸãArduinoã¯ã¢ããã°å€ãèªã¿åããå ã¬ãã«ã«åºã¥ããŠã¢ã¯ã·ã§ã³ãå®è¡ã§ããŸãã
ã³ãŒãäŸïŒArduinoïŒïŒ
int lightSensorPin = A0; // å
ã»ã³ãµãŒãæ¥ç¶ãããã¢ããã°ãã³
int ledPin = 13; // LEDãæ¥ç¶ãããããžã¿ã«ãã³
void setup() {
Serial.begin(9600);
pinMode(ledPin, OUTPUT);
}
void loop() {
int sensorValue = analogRead(lightSensorPin);
Serial.print("Sensor Value: ");
Serial.println(sensorValue);
// å
ã¬ãã«ããããå€ãäžåã£ãå Žåã«LEDããªã³ã«ãã
if (sensorValue < 500) {
digitalWrite(ledPin, HIGH); // LEDããªã³ã«ãã
} else {
digitalWrite(ledPin, LOW); // LEDããªãã«ãã
}
delay(100);
}
説æïŒãã®ã³ãŒãã¯ããã³A0ã«æ¥ç¶ãããå ã»ã³ãµãŒããã¢ããã°å€ãèªã¿åããŸããå€ã500æªæºã®å Žåããã³13ã«æ¥ç¶ãããLEDãç¹ç¯ãããŸããã»ã³ãµãŒã®å€ã¯ãããã°ã®ããã«ã·ãªã¢ã«ã¢ãã¿ãŒã«ãåºåãããŸãã
Raspberry Pi
Raspberry Piã¯Arduinoããã匷åãªãã©ãããã©ãŒã ã§ãããããé«ãåŠçèœåãšå€ãã®æ¥ç¶ãªãã·ã§ã³ãæäŸããŸããé²ç¯ã«ã¡ã©ãæ°è±¡èŠ³æž¬æãªã©ãããè€éãªå æå¿ã·ã¹ãã ãæ§ç¯ããããã«äœ¿çšã§ããŸããå ã»ã³ãµãŒãRaspberry Piã«æ¥ç¶ããã«ã¯ãã¢ããã°-ããžã¿ã«å€æåšïŒADCïŒã䜿çšããŠã»ã³ãµãŒã®ã¢ããã°åºåãRaspberry Piãèªã¿åããããžã¿ã«ä¿¡å·ã«å€æããŸããRaspberry Piãšäºææ§ã®ããæ§ã ãªADCã¢ãžã¥ãŒã«ãå©çšå¯èœã§ãã
ã³ãŒãäŸïŒPython, Raspberry Pi - MCP3008ãªã©ã®ADCã䜿çšïŒïŒ
import spidev
import time
# SPIãã©ã¡ãŒã¿ãå®çŸ©
spi = spidev.SpiDev()
spi.open(0, 0) # CE0ãã³
spi.max_speed_hz = 1000000
# MCP3008ã®ãã£ã³ãã«ãå®çŸ©ïŒ0-7ïŒ
LIGHT_SENSOR_CHANNEL = 0
# MCP3008ããããŒã¿ãèªã¿åã颿°
def read_mcp3008(channel):
adc = spi.xfer2([1, (8 + channel) << 4, 0])
data = ((adc[1] & 3) << 8) + adc[2]
return data
# ã¡ã€ã³ã«ãŒã
try:
while True:
light_level = read_mcp3008(LIGHT_SENSOR_CHANNEL)
print(f"Light Level: {light_level}")
# äŸïŒå
ã¬ãã«ã«åºã¥ããŠã¢ã¯ã·ã§ã³ãããªã¬ãŒ
if light_level < 200:
print("Low light detected!")
# ããã«ã¢ã¯ã·ã§ã³ãå®è¡ããã³ãŒãã远å ïŒäŸïŒã¢ã©ãŒããéä¿¡ïŒ
time.sleep(0.5)
except KeyboardInterrupt:
spi.close()
print("\nExiting...")
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