Brandon adds a LM555 and some LEDs to his toddler’s glow-in-the-dark headboard. Now his son has a beautiful night light that is on when he needs it and automatically turns off when he sleeps… Link.
From the pages of MAKE:
The Biggest Little Chip. MAKE 10 – page 62. An introduction to the versatile 555 timer. Subscribers–read this article now in your digital edition.