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DAVIDG
Pooh-Bah
Reged: 12/02/04
Posts: 1458
Loc: Hockessin, De
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Re: DIY Dew Controller Questions...
06/24/08 04:28 PM
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What setting are you using on your meter to measure the voltage ? Pulse width modulation is always putting out the same voltage, but varies the duty cycle, ie the time the voltage is full on vs full off. If your using the DC mode on your voltmeter, the meter has a time constant and once the "on time" of the pulse is over about 30%, the meter will read the same voltage. You need an oscilliscope to see the wave form.
- Dave
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Homemade 'scopes 8"f/7,6" f/5", 6"f/4, 4.25" Schief. 60mm Coronagraph,60mm H-alpha system, 4.25" White-light Solar Newtonian,solar spectroscope, 4.5" f/16 Schupmann Medial refractor, 14 Stellafane awards 7 in optics
Engineering = Taking what you have and making what you need.
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