Friday, November 28, 2008

Make your own Smart Coaster

Here's how you can make your own Smart Coaster which will tell you when it's safe to sip your hot coffee or tea. You'll need a round metal container, simple circuit consisting of a thermistor, a special low-power operational amplifier (op amp) IC, an LED, and a couple of passive components.

No comments:

Featured Post

Singapore Haunted: Top 10 Most Haunted Moments Caught On Camera!

A flying ghost at Changi Hospital, a playful tree spirit at Bedok Reservoir and the ghost of a girl who died at the famous Yellow Tower at...