Often, for certain low voltage lighting systems; you would like to turn off the lights during the bright light of the day. Most commercial day/night switches are designed for AC lighting. This hobby ...

With this sound activated switch, control by sound may be very useful, not just on a robot but also for a bit of home automation, for example a sound-activated light responding to a knock on the door ...

In this project, I'll make a small circuit capable of blinking lights, on its output we get a digital signal that we can use ...

If you’ve ever seen those gadgets with the “breathing light” LEDs on them and wondered how to do it, then [DIY GUY Chris] can show you how to design your own surface-mount version, using only analogue ...

Earlier this month, I spoke with Sheila Kennedy, principal of Kennedy & Violich Architecture, the Boston firm that established the Portable Light Project, about how a dedicated group of designers, ...

Reversing a district court decision that had delayed work on the $2.4 billion Purple Line light rail transit project in Maryland, the U.S. Court of Appeals for the District of Columbia Circuit has ...