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edbenjohn

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edbenjohn

Kettle noises

What is the noise a kettle makes as soon as you turn it? It's obviously not the noise of the water boiling, coz it's not boiled!
10:21 Thu 10th May 20011 answer, last by Isaacr 18:53 Sun 20th May 2001
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edbenjohn

Infrared photosensor

How do I wire up an infrared photosensor? How does it work? What changes when it senses infrared?
08:52 Tue 08th May 20011 answer, last by Sensei 01:54 Wed 09th May 2001

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