Electricity and Your First GPIO Outputs

10 Lektionen in dieser Stufe

1. Voltage, Current and Resistance for Makers
   Describe the three quantities and apply Ohm's law to a simple circuit. · Lab: Calculate the current through three resistor values at 3.3 V and check one with a multimeter.
2. How a Breadboard Is Wired Inside
   Predict which holes are connected and build a circuit that matches a diagram. · Lab: Map your breadboard with the continuity tester and mark the rail break if it has one.
3. Measuring Voltage, Continuity and Resistance with a Multimeter
   Select the right range and probe position for three basic measurements. · Lab: Measure the 3.3 V and 5 V header pins, five resistors and a suspect jumper wire.
4. The 40-Pin Header: Power, Ground and GPIO Numbering
   Find any pin by GPIO number and by physical position. · Lab: Run the pinout command and label the breakout board with the pins you will use.
5. GPIO Safety Limits: 3.3 V Logic and Current Budgets
   State what damages a GPIO pin and how to stay inside the limits. · Lab: Review six wiring sketches and mark each one safe or unsafe with the reason.
6. Calculating a Resistor and Lighting an LED from 3.3 V
   Choose a series resistor from forward voltage and target current. · Lab: Light an LED from the 3.3 V pin through a calculated resistor and measure the actual current.
7. Blinking an LED with gpiozero
   Control an output pin from Python using the LED class. · Lab: Wire an LED to GPIO17 and write a blink script with on, off and blink.
8. How gpiozero Reaches the Pins: Pin Factories and lgpio
   Explain the layers between your script and the pin on Pi 4 and on Pi 5. · Lab: Print the active pin factory, list GPIO chips with gpioinfo and note what differs on a Pi 5.
9. Fading with PWM and Mixing Colours on an RGB LED
   Use duty cycle to set brightness and combine channels into colours. · Lab: Fade an LED with PWMLED, then cycle an RGBLED through six colours.
10. Sequencing Several LEDs into a Traffic Light
    Coordinate several outputs with lists, loops and timing. · Lab: Build a three-LED traffic light and run the correct sequence for your country.

Abschlussprojekt

A traffic light and RGB mood lamp on a breadboard, with every resistor value calculated by you and every voltage checked with a multimeter.

Teile für diese Stufe

• 1 × Raspberry Pi 5 or Pi 4 set from Level 1
• 1 × Breadboard 830 tie points
• 1 × GPIO breakout (T-cobbler) with ribbon cable
• 1 × Jumper wire set (male-male and male-female)
• 10 × LED 5 mm assorted colours
• 1 × RGB LED common cathode
• 1 × Resistor kit (220 ohm to 10 k ohm)
• 1 × Digital multimeter

In jeder Lektion legst du die passenden Teile direkt in den Warenkorb. Raspberry Pi →