Search found 11 matches: voltmeter

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Re: Local sources for anemometer?

An old small DC motor, with three cups on the top. Calibrate wind speed vs voltage by driving in your car (on a windless day). Still it on a pole,
attach wires and a voltmeter, and there you go!

Logging it over time is not so simple.... let me know if you come up with a cunning plan for that!
by windgat
on Thu Feb 18, 2010 2:08 pm
 
Forum: General
Topic: Local sources for anemometer?
Replies: 1
Views: 2632

Re: Bedini and free energy

... crystals off the surface of the lead. Maybe that is what is happening - have you looked at the output of your charger with a scope? A digital voltmeter is a notoriously inaccurate way to measure a fluctuating voltage.
by windgat
on Wed Jan 06, 2010 4:44 pm
 
Forum: Free Energy?
Topic: Bedini and free energy
Replies: 9
Views: 6386

Re: I bought this DC motor

... to the front of the DC motor so that when the propellers spin I would generate electricity. Can I do this by adding a diode in between the voltmeter and the DC motor? Thanks :)
by amarvird
on Thu Oct 01, 2009 1:24 pm
 
Forum: General
Topic: I bought this DC motor
Replies: 32
Views: 25265

Re: Is free energy possible?

... and know that a lack of formal training means people can easily make faulty measurements and conclusions. (A classic example is using a voltmeter that measures peak voltage, and assuming this is average voltage). I think that a million, or maybe a billion such ideas will come along and, ...
by windgat
on Mon Jul 27, 2009 1:55 pm
 
Forum: Free Energy?
Topic: Is free energy possible?
Replies: 15
Views: 5994

Re: Build diary

... the coils: that's ok, you have one 'common' connection and 5 independent connections. To test all the phases are good you would connect one voltmeter lead (in AC volt mode) to the common connection, and the other lead to each of the 5 independent ones in turn. You should get the same voltage ...
by windgat
on Mon Dec 01, 2008 3:56 pm
 
Forum: General
Topic: Build diary
Replies: 33
Views: 19464

Re: I bought this DC motor

I guess it would. To confirm, attach the voltmeter, spin by hand, and watch which way gives a -'ve voltage.
by windgat
on Tue Nov 25, 2008 4:23 pm
 
Forum: General
Topic: I bought this DC motor
Replies: 32
Views: 25265

Re: I bought this DC motor

... once its turning, or use a diode to block current flowing into (instead of out of) the motor. What I meant was: Test 1 (open circuit): Connect a voltmeter across the motor Measure voltage and rpm across a range of rpm, at least up to where you get 14V or so. Test 2 (battery as load): Connect ...
by windgat
on Wed Nov 19, 2008 5:15 pm
 
Forum: General
Topic: I bought this DC motor
Replies: 32
Views: 25265

Re: Batteries

... 12.2V. Lead acid batteries can get sulphated beyond repair, which happens when they are left uncharged for a while. If you test the battery with a voltmeter and its less than 11.5V or chances are its not good. But for R50 you can't go too far wrong. If its less than 10V that probably means one ...
by windgat
on Tue Nov 18, 2008 9:22 am
 
Forum: Electrics and controls
Topic: Batteries
Replies: 14
Views: 10522

Re: I bought this DC motor

... (in series) which can measure a few amps. Don't use the 200mA setting on the meter - you will probably blow a fuse. Ideally you should also have a voltmeter on the battery at the same time. Then crank up the motor (for a short while) using a drill or something, and measure three things simultaneously: ...
by windgat
on Tue Nov 18, 2008 8:46 am
 
Forum: General
Topic: I bought this DC motor
Replies: 32
Views: 25265

Re: The Power of Iron

... current: P = VI, so I = 0.25A Now use V=IR, so R = 8 / 0.25 = 32 ohm Put the resistor in series with a ampmeter across the battery. Put a voltmeter in parallel to the resistor. Watch and note the volts simultaneously with the amps every say 10 sec. If the volts and amps drop quickly, the ...
by windgat
on Thu Jul 03, 2008 10:24 pm
 
Forum: Electrics and controls
Topic: The Power of Iron
Replies: 5
Views: 5034

Resitance under load

... it appears that the power i use to rotate it is not enough and when there is no electriacal load the turbine rotates at 250-300rpm easily and the voltmeter shows 40-58 volts easily. The problem is when i put for example 5 wats/12v bulb then the whole system stops and its VERY VERY VERY hard to ...
by pdm
on Thu Aug 30, 2007 1:30 pm
 
Forum: General
Topic: Resitance under load
Replies: 1
Views: 2513

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