add how it works section

Author: Hannes7eicher

content/micropython/03.micropython/modulinos/02.modulino-distance/assets/CIRCUIT-BREAKOUT.png

@@ -30,7 +30,7 @@ We will also need the following software:
 
 Before we start programming, we will need to connect our Modulino Distance to our Arduino board. For this we can follow the circuit diagram below:
 
-![Circuit Diagram]()
+![Circuit Diagram](./assets/CIRCUIT-BREAKOUT.png)
 
 ## Modulino Distance Code Example
 
@@ -47,3 +47,12 @@ while True:
     sleep_ms(50)
 ```
 
+## How it works
+
+The Modulino Distance is a sensor that measures the time it takes for light to travel from the module to the object and back, using a tiny laser and a light sensor. The distance sensor is also known as a Time of Flight (ToF) sensor.
+
+The sensor can be used for a variety of projects, including gesture triggers, obstacle detection robots and motion detection.
+
+***Note: For extra shipping protection, some sensors come with a small yellow plastic cover on the Modulino Distance sensor. If you notice this plastic piece still in place, please remove it to ensure more accurate readings.***
+
+![REPL](./assets/how-it-works.gif)

content/micropython/03.micropython/modulinos/02.modulino-distance/assets/how-it-works.gif

@@ -30,7 +30,7 @@ We will also need the following software:
 
 Before we start programming, we will need to connect our Modulino Pixels to our Arduino board. For this we can follow the circuit diagram below:
 
-![Circuit Diagram]()
+![Circuit Diagram](./assets/CIRCUIT-BREAKOUT.png)
 
 ## Modulino Pixels Code Example
 
@@ -89,3 +89,9 @@ for j in range(0, 3):
 pixels.clear_all()    
 pixels.show()
 ```
+
+## How it works
+
+The Modulino Pixels is a series of addressable RGB LEDs. These can be controlled by setting the brightness or the color of each LED.
+
+![LED Animation]()

content/micropython/03.micropython/modulinos/02.modulino-distance/modulino-distance.md

@@ -30,7 +30,7 @@ We will also need the following software:
 
 Before we start programming, we will need to connect our Modulino Buzzer to our Arduino board. For this we can follow the circuit diagram below:
 
-![Circuit Diagram]()
+![Circuit Diagram](./assets/CIRCUIT-BREAKOUT.png)
 
 ## Modulino Buzzer Code Example
 
@@ -91,4 +91,12 @@ siren_melody = generate_siren(440, 880, 4000, 200, 2)
 
 for note, duration in siren_melody:
     buzzer.tone(note, duration, blocking=True)
-```
+```
+
+## How it works
+
+The Modulino Buzzer is a tiny speaker that can output sound waves.
+
+The speaker is called a "piezo", which comes from piezoelectricity. When you apply voltage to the speaker with a specific frequency, you generate a specific sound. Changing the frequency will change the tone of the speaker.
+
+![How it wors]()

content/micropython/03.micropython/modulinos/03.modulino-pixels/assets/CIRCUIT-BREAKOUT.png

@@ -31,7 +31,7 @@ We will also need the following software:
 
 Before we start programming, we will need to connect our Modulino Buttons to our Arduino board. For this we can follow the circuit diagram below:
 
-![Circuit Diagram]()
+![Circuit Diagram](./assets/CIRCUIT-BREAKOUT.png)
 
 ## Modulino Buttons Code Example
 
@@ -64,3 +64,10 @@ while True:
       led_c_status = buttons.is_pressed(2) # Turn LED C on if button C is pressed
       buttons.set_led_status(led_a_status, led_b_status, led_c_status)
 ````
+## How it works
+
+The Modulino Buttons is a three-button module, each button capable of having a HIGH or LOW state. Additionally, this Modulino has 3 yellow LEDs which can also be controlled independently.
+
+The button is used in pretty much every electronic circuit, as it is the easiest way to switch between states! The most common example is a light switch, where a button press activates a light.
+
+![REPL](./assets/how-it-works.gif)

content/micropython/03.micropython/modulinos/03.modulino-pixels/assets/how-it-works.gif

@@ -30,7 +30,7 @@ We will also need the following software:
 
 Before we start programming, we will need to connect our Modulino Knob to our Arduino board. For this we can follow the circuit diagram below:
 
-![Circuit Diagram]()
+![Circuit Diagram](./assets/CIRCUIT-BREAKOUT.png)
 
 ## Modulino Knob Code Example
 
@@ -55,3 +55,15 @@ while True:
 
     sleep(0.1)
 ````
+
+## How it works
+
+The Modulino Knob is a rotary encoder that increases, or decreases, a number based on which direction it is rotating.
+
+When the knob moves into a new position, it sends a signal to the Arduino board with the new position.
+
+Turning it right increases the number (for example from 1 to 2).
+Turning it left decreases the number (for example from 2 to 1)
+Clicking it will also register a button click (HIGH on click).
+
+![REPL](./assets/how-it-works.gif)

content/micropython/03.micropython/modulinos/03.modulino-pixels/modulino-pixels.md

@@ -30,7 +30,7 @@ We will also need the following software:
 
 Before we start programming, we will need to connect our Modulino Movement to our Arduino board. For this we can follow the circuit diagram below:
 
-![Circuit Diagram]()
+![Circuit Diagram](./assets/CIRCUIT-BREAKOUT.png)
 
 ## Modulino Movement Code Example
 
@@ -48,3 +48,11 @@ while True:
     print("")
     sleep_ms(100)
 ````
+
+## How it works
+
+The Modulino Movement can measure acceleration, which means it measures the rate of change of velocity of an object in terms of its linear acceleration along multiple axes.
+
+The Modulino Movement can, in other words, detect when something moves, and how fast it moves. It is a sensitive sensor that can also measure vibration.
+
+![How it works](./assets/how-it-works.gif)

content/micropython/03.micropython/modulinos/04.modulino-buzzer/assets/CIRCUIT-BREAKOUT.png

@@ -30,7 +30,7 @@ We will also need the following software:
 
 Before we start programming, we will need to connect our Modulino Thermo to our Arduino board. For this we can follow the circuit diagram below:
 
-![Circuit Diagram]()
+![Circuit Diagram](./assets/CIRCUIT-BREAKOUT.png)
 
 ## Modulino Thermo Code Example
 
@@ -53,3 +53,9 @@ while True:
 
     sleep(2)
 ````
+
+## How it works
+
+The Modulino Thermo can read both the temperature and humidity around you. This is a great component when you want to track the changes in indoor environments.
+
+![How it works](./assets/how-it-works.gif)