Added Day #8 and edit Readme

8-dezember.py

@@ -0,0 +1,68 @@
+# Imports
+import onewire, ds18x20, time
+from machine import Pin, PWM
+
+# Set up the LED pins
+red = Pin(18, Pin.OUT)
+amber = Pin(19, Pin.OUT)
+green = Pin(20, Pin.OUT)
+
+# Set up the Buzzer pin as PWM
+buzzer = PWM(Pin(13))
+
+# Start PWM duty to 0% at program start
+buzzer.duty_u16(0)
+ 
+# Set the data pin for the sensor
+SensorPin = Pin(26, Pin.IN)
+ 
+# Tell MicroPython that we're using a DS18B20 sensor, and which pin it's on
+sensor = ds18x20.DS18X20(onewire.OneWire(SensorPin))
+
+# Look for DS18B20 sensors (each contains a unique rom code)
+roms = sensor.scan()
+
+def alarm(): # Our alarm function
+    
+    buzzer.duty_u16(10000) # Buzzer duty (volume) up
+
+    for i in range(5): # Run this 5 times
+        
+        buzzer.freq(5000) # Higher pitch
+        
+        # LEDs ON
+        red.value(1)
+        amber.value(1)
+        green.value(1)
+        
+        time.sleep(0.2) # wait 1 second
+        
+        buzzer.freq(1000) # Lower pitch
+        
+        # LEDs OFF
+        red.value(0)
+        amber.value(0)
+        green.value(0)        
+        
+        time.sleep(0.2) # wait 1 second
+
+    buzzer.duty_u16(0) # Buzzer duty (volume) off 
+
+while True: # Run forever
+  
+    time.sleep(5) # Wait 5 seconds between readings
+  
+    for rom in roms: # For each sensor found (just 1 in our case)
+    
+        sensor.convert_temp() # Convert the sensor units to centigrade
+        time.sleep(1) # Always wait 1 second after converting
+    
+        reading = sensor.read_temp(rom) # Take a temperature reading
+    
+        print(reading) # Print the reading
+
+        if reading < 25: # If reading is less than or equal to 18
+         
+            alarm() # Call our alarm function
+
+

README.md

@@ -88,5 +88,21 @@ So what did we cover on day #7? Today you have:
 
 ------------------------------------------------------------------------------------------------------
 
+Day 8 Complete!
+
+Another day, another component completed! You now have a temperature sensor in your growing arsenal of parts to make projects with, and we're sure you'll use this one time and time again.
+
+As you're probably starting to realise, a lot of these sensors and components are coded in a very similar way. Sometimes we need the help of imported libraries, sometimes we need resistors/additional hardware, but the fundamental way we write code for them (with loops, if statements and variables) is pretty consistent.
+
+So what did we cover on day #8? Today you have:
+
+    Built a circuit with a temperature sensor
+    Learnt how to use a temperature sensor with MicroPython and the Pico
+    Used your first 1-wire component and the 1-wire library
+    Created a temperature monitor and temperature alarm system
+    Learnt more about for loops
+
+------------------------------------------------------------------------------------------------------
+
 <img src="https://git.unixweb.net/unixweb/pihut-advent-kalender/raw/branch/master/images/pihut-advent-kalender.jpg">