[Cyborg] motor success, compass fail

Lamont Lucas lamont at cluepon.com
Mon Mar 23 22:38:28 UTC 2009

I can totally add my measurements of the motor to the spreadsheet.  And 
if you like, I'm happy to drop off a few motors for you to play with 
while I'm gone.  Just let me know when you'll be by NB, or if your shelf 
is clearly labeled, I can put them in an envelope and put them on the shelf.

I was just varying the knob on my power supply and measuring the in-line 
current draw with my multimeter.  But like I said, I plan on driving 
them via PWM, so the impedance of the motor should increase as I 
increase the frequency of the PWM (or as the motor spins faster).  Which 
means that they should take even less current while being driven like 
that, although I'm not really sure how practical that effect is given 
the relatively low frequencies I can drive it at.

If I finish wiring up the test harness with my RBBB and shift-register 
driver chip, would you be interested in using it for the week I'm gone?  
You'd either need to borrow my FTDI cable or have your own TTL-to-USB 
chip that works with the arduino IDE.

Rachel McConnell wrote:
> That looks smaller than any of the ones I have, plus cheaper!  Lamont do
> you have the ability to get specs like we worked out for the others, here:
> http://spreadsheets.google.com/ccc?key=p--xq5BkJD5E_DTRwEdLcEA&hl=en
> Alternately, will you be at NB any time before you go on your trip,
> would you lend one so I can take comparable specs from it?  The other
> motors all run well at 1V but vary somewhat in their draw at that voltage.
> I will shortly add a bit more detail to the Sensors wiki page as I fear
> I didn't explain the specs well enough to reproduce them.
> R
> Lamont Lucas wrote:
>> http://www.goldmine-elec-products.com/prodinfo.asp?number=G16777

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