First Arduino circuit — blink, button, sensor
Learning the fundamentals of microcontrollers: driving an LED, reading a button, and responding to a sensor on a breadboard.
Problem
I wanted to go from writing code on a screen to making physical things happen — the core of embedded electrical engineering.
Approach
Start with the classic "blink" sketch, then add inputs and outputs one at a time so I understand each piece: an LED (output), a push-button (digital input), and a [light/temperature] sensor (analog input).
Build
- [Wired the LED + resistor on a breadboard and made it blink.]
- [Added a push-button to turn the LED on and off in code.]
- [Read a sensor value and made the LED respond to it.]
(Add a photo of the breadboard and a short demo clip here as you go.)
Result
[What works so far, what was harder than expected, and what I learned about circuits, current, and debugging.]
Next: combine these into something useful — a [night-light / reaction-timer / mini alarm].