A Karaoke mixer and amplifier for the iPhone.

How to shoot HDR photos without a tripod.

Lessons learned on the topic of high-speed signal probing, and how to build a high-bandwidth "Lo-Z" probe for very little money.

How combining resistors affects the overall tolerance of the total resistance.

Composition tips when shooting in panoramic format.

Build a battery operated light box for photographing small objects.

An LED lighting project with slow fade-in effect and two switchable lighting levels.

This is my second article on using Olympus OM Zuiko lens with the Sony NEX-5N. In the first installment, we looked at the 50 mm f/1.4 lens. This time around, we look at the Zuiko 24 mm f/2.8 lens.

How to Add a Swivel Base to a Monopod.

My garden features a set of "garden lamps" which I turn-on at night.