Arduino
LPG gas leak alarm that you can actually trust
A kitchen gas alarm for about Rs.900. Why the sensor needs 24 hours of burn-in before you believe it, why the datasheet number is not a PPM reading,...
Beginner
Self-watering planter that texts you when the tank runs dry
Keeps a plant alive while you are away, and tells you before it fails. Why the cheap resistive moisture probes corrode away in weeks, why a dry-run protection...
Build Log
ESP32-CAM security camera that messages your phone when something moves
A WiFi camera that photographs whatever triggered it and pushes the picture to your phone, for about Rs.850. The brownout that makes people think their board is dead,...
Build Log
A room monitor that serves its own dashboard: NodeMCU, DHT11 and no cloud account
Most IoT tutorials start by making you an account somewhere, then the free tier changes and your project is landfill. This one has no account and no broker:...
