Although obviously none of us can say what the 2006 rules will be, last year they got rid of the allowed electronics vendor list and allowed all COTS parts, so unless that changes (I can't really see them going back to the very restrictive old rules), you should be able to buy these from any of Allegro's dealers or use samples (although you have to account for the cost as if you bought them from a dealer).
Make sure you get one in the right range of what you are looking to measure. If you were to use this to measure the current of something drawing 10 Amps or so, it would be pretty useless as it goes from -75A to +75A over the 5V range, and you are reading it on a 10-bit AD converter.
If you really wanted to measure voltage of the battery on the RC, a simple voltage divider (split it in 1/3 or so) would suffice.
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Originally Posted by eugenebrooks
As posted in this thread, a pair of 75 amp Allegro current sensors were in the 2004 KOP. See the link
http://www.allegromicro.com/demo/asek750.htm
for product information, specification sheets, and links to buy evaluation kits.
Whether or not you can actually use these on your 2006 robot depends upon whether they are in the 2006 KOP, or if they are available from an allowed vendor of electronic parts as defined by the 2006 rules. Refer to the technical documentation for a power bypass capacitor recommendation and cautions with regard to resistive and capactive loading of the output signal. Remember that your current signal is likely to be unsteady, as for the pulse width modulated control delivered by a Victor, and you will either need to condition the signal with analog electronics or you will have to process the signal appropriately with the robot controller. |