Alt-BEAM Archive
Message #01157
To: Wilf Rigter
From: Steven Bolt [SMTP:sbolt@xs4all.nl]
Date: Tue, 2 Mar 1999 00:07:42 -0800
Subject: RE: pocket motor-tester / BEAM multi-meter
On Mon, 1 Mar 1999, Wilf Rigter wrote:
> The stored energy goes up with the square of the voltage ie
> double the volts = four times the energy.
Um, you lost me there. Afaik:
Energy = power x time = voltage x current x time
charge = current x time = capacitance x voltage
Capacitance = charge / voltage
Where does your voltage squared come from?
> Now add some variable PWM to "regulate or shape" the output
> current and it is possible to optimize the electrical to "useful"
> mechanical energy conversion.
PWM Rigter :)
I'd like to see a demonstration of pwm actually improving the light
to motion conversion of a photovore powered by a solar panel and
storing energy in a cap. I feel a little sceptical.
Best,
Steve
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# sbolt@xs4all.nl # Steven Bolt # popular science monthly KIJK
#
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Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
tel: (604)590-7493
fax: (604)590-3411
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