Submitted by TrystanLea on Wed, 02/17/2010 - 12:21.
Hey Eric
Thanks for the comment and thanks for pointing out the incorrect adapter link, I've corrected it on the google docs but here's the link to safe you looking:
I like the sound of your plan, it would be very interesting to monitor branch circuits! I would be interested to hear how it goes with the analog multiplexer if you have a go at that and the higher resolution ADC. I think the challenge with an external ADC is whether you can get a fast enough sample rate? You would need pretty fast communication with the Arduino...
Another option that could be investigated to increase accuracy while using the 10bit ADC is to have a switchable gain amplifier, analog devices have an app note describing this here.
I dont currently have all the code in a SCM, havent had a change to look at how to do it. It would be probably worth doing wouldent it, what would you recommend?
The graph should be pretty accurate, the details of the accuracy of it are on the mains ac non invasive 2 page. I've been the only person in the house for the last couple of days so it is a bit lower than usual. I did a bit of hovering yesterday and I also spiked on the immersion heater for an example 9:10 :)
Just had a look at your blog, I like the look of the solar roof! Awsome blog.
Hey Eric Thanks for the
Hey Eric
Thanks for the comment and thanks for pointing out the incorrect adapter link, I've corrected it on the google docs but here's the link to safe you looking:
http://uk.farnell.com/_/mb090a050u-d/adaptor-euro-9vac-500ma/dp/1217064
I like the sound of your plan, it would be very interesting to monitor branch circuits! I would be interested to hear how it goes with the analog multiplexer if you have a go at that and the higher resolution ADC. I think the challenge with an external ADC is whether you can get a fast enough sample rate? You would need pretty fast communication with the Arduino...
Another option that could be investigated to increase accuracy while using the 10bit ADC is to have a switchable gain amplifier, analog devices have an app note describing this here.
I dont currently have all the code in a SCM, havent had a change to look at how to do it. It would be probably worth doing wouldent it, what would you recommend?
The graph should be pretty accurate, the details of the accuracy of it are on the mains ac non invasive 2 page. I've been the only person in the house for the last couple of days so it is a bit lower than usual. I did a bit of hovering yesterday and I also spiked on the immersion heater for an example 9:10 :)
Just had a look at your blog, I like the look of the solar roof! Awsome blog.
Trystan