Actuators and Your First Complete Device

10 Lektionen in dieser Stufe

1. Why Pins Cannot Drive Motors: The Transistor as a Switch
   Use an NPN transistor to switch a higher current from a pin through a base resistor. · Lab: Switch a group of LEDs drawing more than a pin may supply through a 2N2222.
2. Flyback Diodes and Switching a Small DC Motor
   Protect the transistor from inductive voltage spikes. · Lab: Run a hobby motor from a battery pack with transistor and diode and vary its speed with PWM.
3. Relay Modules and Safe Low-Voltage Load Switching
   Operate a relay module and understand isolation, contact ratings and why mains is off-limits here. · Lab: Switch a battery-powered lamp with the relay and listen for the click.
4. Hobby Servos: Angles, Pulses and the Servo Library
   Command servo positions and understand the control pulse. · Lab: Sweep a servo and then position it from a potentiometer.
5. Separate Supplies and Common Ground for Motors and Servos
   Power actuators from their own source while sharing ground with the board. · Lab: Reproduce a reset caused by powering a servo from the board, then fix it with a separate pack and capacitor.
6. Decoding an Infrared Remote Control
   Receive remote codes with a library and map them to actions. · Lab: Record the codes of five buttons and use them to drive the servo.
7. Scanning a 4x4 Matrix Keypad
   Understand row and column scanning and read keys with a library. · Lab: Print pressed keys and collect a four-digit entry ending with the hash key.
8. Soldering Your First Joints: Header Pins and Wires
   Make sound through-hole joints safely and recognise cold joints. · Lab: Solder a pin header to a module and tin and join two wires.
9. Planning a Project: Requirements, Block Diagram and Pin Map
   Turn an idea into written requirements, a block diagram and a pin allocation table. · Lab: Write the plan for the door lock including a pin map and power budget.
10. Assembling and Testing a Device Stage by Stage
    Integrate hardware and code in small tested steps instead of all at once. · Lab: Build the lock in four stages, testing each with its own short sketch before merging.

Abschlussprojekt

A keypad and infrared-remote door lock model with servo latch, LCD prompts, buzzer feedback and a soldered wiring harness.

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 and male-female
• 2 × NPN transistor 2N2222
• 2 × Diode 1N4007
• 2 × Resistor 1 kilohm
• 1 × Small DC hobby motor 3–6 V
• 1 × Relay module 5 V single channel
• 1 × Micro servo SG90
• 1 × Battery holder 4xAA with batteries
• 1 × Electrolytic capacitor 470 microfarad
• 1 × Infrared receiver module with remote
• 1 × Matrix keypad 4x4
• 1 × LCD 16x2 with I2C backpack
• 1 × Passive buzzer
• 1 × Soldering iron with stand
• 1 × Solder wire
• 2 × Pin header strip
• 1 × Safety glasses

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