PWM, Colour and Sound

10 Lektionen in dieser Stufe

1. Pulse Width Modulation and Duty Cycle
   Explain how rapid switching creates an average output and which UNO pins support it. · Lab: Measure the average voltage on a PWM pin at 25, 50 and 75 percent duty with a multimeter.
2. Fading an LED with analogWrite
   Ramp a duty cycle up and down with loops. · Lab: Create a smooth breathing light on pin 9.
3. A Potentiometer-Controlled Dimmer
   Link an analog input to a PWM output with correct scaling. · Lab: Dim an LED from a knob and print both the input and output values.
4. Mixing Colours on an RGB LED
   Drive three PWM channels to produce any colour. · Lab: Set colours by typing three numbers into the Serial Monitor.
5. Perceived Brightness and Gamma Correction
   Use a lookup table so brightness steps look even to the eye. · Lab: Fade an LED linearly and with a gamma table and compare the look.
6. Active versus Passive Buzzers
   Tell the two types apart and drive each correctly. · Lab: Sound an active buzzer with a steady level and a passive one with a toggled pin.
7. Playing Notes with tone and noTone
   Generate a frequency for a set duration. · Lab: Play a rising scale and an alarm siren.
8. Storing a Melody in Arrays
   Hold note and duration data in parallel arrays and step through them. · Lab: Compose and play a short jingle of your own from two arrays.
9. Random Numbers with random and randomSeed
   Generate pseudo-random values and seed them from an unconnected analog pin. · Lab: Light random LEDs and show the sequence repeating without a seed.
10. A Light-Controlled Pitch Instrument
    Combine an analog sensor, mapping and tone into one interactive instrument. · Lab: Play pitches by moving your hand over the photoresistor and add a mute button.

Abschlussprojekt

A four-colour memory game with LEDs, buttons and tones that grows a random sequence each round.

Teile für diese Stufe

• 1 × UNO-compatible board
• 1 × USB cable matching the board
• 1 × Solderless breadboard 830 points
• 1 × Jumper wire set male-male
• 1 × RGB LED common cathode
• 4 × LED 5 mm assorted
• 7 × Resistor 220 ohm
• 3 × Potentiometer 10 kilohm
• 1 × Passive buzzer
• 1 × Active buzzer
• 4 × Tactile push button
• 1 × Photoresistor (LDR)
• 1 × Resistor 10 kilohm

In jeder Lektion legst du die passenden Teile direkt in den Warenkorb. Arduino-kompatibel →