Скачать или смотреть Control 2 Power Sources with Arduino! ⚡ Motors & LEDs Using Transistors & Diodes

In this Science Sidekicks project, we level up our Arduino skills by safely controlling two independent power sources — a 9VDC motor and a 5VDC LED — using transistors and diodes!

Learn how to connect a motor and LED to your Arduino without damaging it, even when using different voltage levels. This circuit uses transistors as digital switches, diodes to block back current, and a common ground to keep everything safe and running smoothly.

🧰 In this build, we:
Power a 9V motor with a transistor switch connected to Arduino
Use a second transistor to control an LED from a 5V source
Safely share a common ground across power supplies
Add a flyback diode to protect against voltage spikes from the motor
Keep Arduino I/O pins protected using proper circuit design
This tutorial is perfect for those learning real-world electronics and how to safely integrate higher voltage devices with a low voltage microcontroller.

👨‍👧 Follow along with our father-daughter team for weekly DIY STEM builds, Arduino tips, and practical electronics know-how!

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