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killawatt power sensor
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killawatt power sensor

by dstamand on Fri Apr 17, 2009 4:41 am

Hey,

Before i fried either my killawatt sensor or my ATmega analog ports, i'm asking that what can be the best way to read values from pin #1 or pin #4 of the killawatt power sensor with Arduino analog inputs ?

Thanks for the help.

dstamand
 
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Re: killawatt power sensor

by franklin97355 on Fri Apr 17, 2009 6:46 pm

You might find some helpful info if you search on wattcher or tweet-a-watt

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Re: killawatt power sensor

by dstamand on Sat Apr 18, 2009 3:14 am

I'm not sure about a few things, do i power the arduino from the killawatt power sensor 5V or not ?
From this XBEE schematic http://www.ladyada.net/images/wattcher/xbeewatt.png let's say that the XBEE is the Arduino and i just need one analog port to be used, AD4 for this example.
What about the pull-down 10k resistor, still need it ?
I'm a little bit confused right there.
killawatt-sensor.jpg
killawatt-sensor.jpg (113.08 KiB) Viewed 2649 times


Thanks!
Last edited by dstamand on Sat Apr 18, 2009 4:30 am, edited 2 times in total.

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Re: killawatt power sensor

by dstamand on Sat Apr 18, 2009 3:17 am

Oops, just toasted my Arduino analog ports. Something went wrong.
Need a new ATmega328 IC :oops: i still have another Arduino to continue, phew :lol:

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Re: killawatt power sensor

by adafruit on Sat Apr 18, 2009 11:25 am

probably because GROUND is not necessarily Earth Ground.
you would have to battery power your project
do not under any circumstance connect the arduino to your PC or you could -easily- destroy the entire thing

anyone doing any sort of power projects who is not super-knowledgable of proper optoisolation, etc. should just use a tweet-a-watt type system with two wireless modules one of which is completely encased in the killawatt.

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