Most recently I developed a combination lock that opens the garage door. The idea isn’t original, it is based on [Alan Parekh’s] button code project, but I did develop my own hardware and ...

We find keypad-operated door locks to be convenient. These models allow you to create codes for temporary access ... a wide range of products, including combination locks, padlocks, and many ...

and the ESP is running code that instantiates a web server that will unlock the door with a few clicks on a web page. Sure, it’s probably not the most secure lock on the planet, and the 5V ...

Whether you’re cleaning your kitchen after a big meal or finishing a painting project, it can be tempting to pour just about anything liquid—or sometimes even solids—down the drain.