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Re: [Phys-l] glassware needed

Make sure that the 'inexpensive' watt-meter can correctly handle non- sinusoidal wave forms.
Triac's don't output sine wave by a LONG shot.

True RMS measurement are often NOT produced by cheap meters.

(Or so it has been in the past - maybe things are better now??)

On Jan 1, 2009, at Jan 1(Thu) 3:26 , Brian Whatcott wrote:

a wattmeter is now so within reach that it would be a good accessory.
This would enable a TRIAC dimmer to moderate the power,