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Re: Wind Power B/C

Posted: February 24th, 2016, 5:29 pm
by GoofyFoofer
I don't know, I think I'm missing something. The worst I've seen was about 70-something volts...
What kind of resistor are you using?

Re: Wind Power B/C

Posted: February 24th, 2016, 5:30 pm
by dragonfruit35
Oh, sorry! That's the raw voltage before I calculated with the resistor. :lol: :oops: But 70 volts? Really? That seems high :shock:

Re: Wind Power B/C

Posted: February 24th, 2016, 5:34 pm
by dragonfruit35
Um, I tried to calculate the voltage and got .2 volts. Clearly I've calculated wrong... :shock:

I put into the calculator: .35^2= .1225 x 5= .2

Re: Wind Power B/C

Posted: February 24th, 2016, 6:18 pm
by vikch
Yeah 70 volts sounds pretty high :o . Also if your raw voltage was 350 mV then with a 5 ohm resistor the power should be about .025 W although im not sure

Re: Wind Power B/C

Posted: February 24th, 2016, 6:51 pm
by GoofyFoofer
Maybe it was 70mV. I'm not really sure... :oops:
Image
Is this picture from the scores thread mV then?

Re: Wind Power B/C

Posted: February 25th, 2016, 4:42 am
by dragonfruit35
I think those scores might be in millivolts :lol: I hope no one is generating 400 VOLTS... :shock:

Re: Wind Power B/C

Posted: February 25th, 2016, 10:29 am
by soyuppy
yes, raw score value are mV, but event supervisor didn't bother to convert to V when entering the value on the spread sheet. But that shouldn't matter , using the spreadsheet from SOINC website, calculation and output is consistent. It may not be valid, but it's consistent

Re: Wind Power B/C

Posted: February 25th, 2016, 3:19 pm
by dragonfruit35
double posted :oops:

Re: Wind Power B/C

Posted: February 25th, 2016, 3:20 pm
by dragonfruit35
Does the resistor alter the raw voltage output?

Re: Wind Power B/C

Posted: February 25th, 2016, 5:06 pm
by vikch
dragon_fruit35 wrote:Does the resistor alter the raw voltage output?
Having resistance will lower the power outcome but it wouldn't affect the voltage.


http://www.sengpielaudio.com/calculator-ohm.htm