Arduino project · Smart doors and home · Medium
Web-Controlled Lamp
Turn a lamp on and off from a web page. The Arduino checks a cloud switch every few seconds.
What you will learn
- How a web button reaches an Arduino
- What polling means
- Why a local switch is still needed
How it works
The cloud switch is ON or OFF. The LED follows it. In the simulator use the Cloud drop-down. Fill in your own Wi-Fi name, password and ThingSpeak keys in the sketch.
Try this next
- Add a manual button as a backup.
- Add a status field so you can see the lamp state.
- Use a relay for a real lamp (carefully).
The simulator program and explanation on this page are original. The idea follows a classic Arduino project that students have built for years.
Parts: sensors and actuators (tap to show or hide)
Try the inputs (virtual sensors)
Pins (you can change them)
| Part | Arduino pin (change it here) | How to wire it |
|---|
Every wire, one by one
Red rail = 5 V from the Arduino 5V pin. Black rail = GND. The coloured wires carry signals. Match the wire colours on the drawing to this list.
| # | Colour | From (part and leg) | To |
|---|
Steps run from top to bottom, then start again. While the simulation runs, the active step is highlighted in green.
Quantities come from the parts you added. The store links open a search for that item on Robu.in, Amazon.in and ThinkRobotics, so you always see what is in stock today. Check the model, voltage and price before you order.
| # | Item | Qty | Search term | Buy / compare |
|---|
The PDF has the circuit sketch, pin table, every wire, sequence, full code, the parts list with store links, do’s and don’ts for each part, and the safety notes. The project file lets you come back and keep editing.
In the real world
A lamp in a room
Your LED is the lamp in this room. When the LED turns on in the simulator, the room lights up.
Tip: use the gold tab at the bottom of the circuit drawing to pull the real-world view up over the Arduino board. Your parts stay visible above it, so you can press a button and watch the real scene react.
- LED = the ceiling lamp