Have you ever woken up in the middle of the night and stumbled around trying to turn on your light only to end up painfully bumping into things? With this project from Peter Javorsky you can build your own night light which will turn on with a simple knock.
The project uses a piezo sensor to detect a knock and power a white LED strip meaning you can quickly and easily turn on or off your night light! The project comes with full schematics and code examples so there is nothing to stop you getting started. Checkout this link to find out more.