On 10 February 2014 23:49, Daniel MacKay wrote:
>> That being said my 1-Wire solution to measuring my house electricity usage
>> was to buy a Dual Counter from Hobby Boards:
>
> I'm thinking of asking them or Sheep Walk if they'd be interested in
> producing a board with a DS2450 and a 4-channel
> That being said my 1-Wire solution to measuring my house electricity usage
> was to buy a Dual Counter from Hobby Boards:
I'm thinking of asking them or Sheep Walk if they'd be interested in producing
a board with a DS2450 and a 4-channel op amp on it, and the diode, and picking
a compatible i
On Sun, Feb 09, 2014 at 10:26:49AM -0400, Daniel MacKay wrote:
> Chris:
>
> The non 1-Wire ones that you can buy in the store are like this:
>
> http://centameter.co.nz/
>
> ... if you want just the component for the DIY solution, google for "split
> core transformer".
>
Ah, yes, I've fo
Hi Guys,
A bunch of interesting ideas and thoughts being raised here...
I've spent a good few hours over the weekend looking at what is available in
terms of Energy Meters with RS485 serial ports and there are a number on
eBay that provide quite a bit of data. Search on eBay for "energy meter
mod
I think the question is already answered and when I tell you some more
from current-clamps from Europe now, this won't help you anyway ;)
So, directly related another question: is anybody aware of
AC-measurement with 1-Wire *directly* (isolated for sure) with True-RMS
like based on ACS714 or simil
Hello!
Colin and company, I haven't found a reason to contribute to this
gathering, until I remembered a rather unusual display of technology
accomplished by a chap in a part of the US, here's his location:
http://www.picobay.com/projects/2009/01/real-time-web-based-power-charting.html
And that wa
yes would make sense, but then again these clamps are much cheaper then any
other I've found.
On Sun, Feb 9, 2014 at 6:40 PM, Colin Reese wrote:
> I see - you're buying AC/AC CTs. I just buy DC current or voltage output.
> Needn't mess with it.
>
>
>
> On Feb 9, 2014, at 9:14, Marc dirix wrote
I see - you're buying AC/AC CTs. I just buy DC current or voltage output.
Needn't mess with it.
> On Feb 9, 2014, at 9:14, Marc dirix wrote:
>
> I use the opamp to integrate the half sine output of the clamp.
>
>
>
>
>> On Sun, Feb 9, 2014 at 6:05 PM, Colin Reese wrote:
>> What do you n
I use the opamp to integrate the half sine output of the clamp.
On Sun, Feb 9, 2014 at 6:05 PM, Colin Reese wrote:
> What do you need an op amp for? I use these things all over the place and
> plug them straight into adcs, as long as the internal resistance is
> sufficient
>
>
>
> On Feb 9, 2
I see:
http://www.marcspages.co.uk/tech/ctcombin.htm
I never put them in series/parallel. I use dedicated adc channels directly with
no problems. I want to read each individually anyway.
Colin
> On Feb 9, 2014, at 6:59, Marc dirix wrote:
>
> Hi Chris,
>
> I think every reseller should b
What do you need an op amp for? I use these things all over the place and plug
them straight into adcs, as long as the internal resistance is sufficient
> On Feb 9, 2014, at 6:59, Marc dirix wrote:
>
> Hi Chris,
>
> I think every reseller should be able to sell you one, because for their
>
Google current transformer or ct if you want dc output, typically.
> On Feb 9, 2014, at 6:26, Daniel MacKay wrote:
>
> Chris:
>
> The non 1-Wire ones that you can buy in the store are like this:
>
>http://centameter.co.nz/
>
> ... if you want just the component for the DIY solution, goog
This is an interesting discussion on a similar topic
http://community.ubnt.com/t5/mFi/Current-sensors-and-wiring-codes/td-p/464543
They recommend
http://www.byramlabs.com/product_info.php/products_id/20748/product/Byram%20LaboratoriesBL-3%20Series%20BL-3-200-RV002%20Split-C
Hi Chris,
I think every reseller should be able to sell you one, because for their
system you need to buy loose clamps if your connection is 3-fase.
I've bought mine from bespaarbazaar.nl (obviously in the Netherlands).
Amazon seemed to have sold them:
http://www.amazon.co.uk/Current-Cost-Sensor-
Marc:
> I've made an 1-wire interface for the current cost clamps. The current cost
> clamp is specified 100A with 50mA accuracy. You can buy spare current cost
> clamps for about 15 euro. The interface is a simple opamp+DS2450. On request
> I'll send you the eagle schematic.
Yes please! I th
Chris:
The non 1-Wire ones that you can buy in the store are like this:
http://centameter.co.nz/
... if you want just the component for the DIY solution, google for "split core
transformer".
On 2014-02-09, at 09:29 , Chris Green wrote:
> On Sat, Feb 08, 2014 at 07:59:43PM +0100, Marc
On Sat, Feb 08, 2014 at 07:59:43PM +0100, Marc dirix wrote:
>Hi,
>I've made an 1-wire interface for the current cost clamps. The current
>cost clamp is specified 100A with 50mA accuracy. You can buy spare current
>cost clamps for about 15 euro. The interface is a simple opamp+DS2450
Though not 1-wire, you might want to consider the CAI Webcontrol board
(~$40 via EBay) and obtaining the clamp from one of the EBay hobby sources
(many Hong Kong based sellers). The Webcontrol has built in analog voltage
circuitry and does all sorts of other neat stuff.
-Don
On Sat, Feb 8, 2014
Hi,
I've made an 1-wire interface for the current cost clamps. The current cost
clamp is specified 100A with 50mA accuracy. You can buy spare current cost
clamps for about 15 euro. The interface is a simple opamp+DS2450. On
request I'll send you the eagle schematic.
/Marc
On Sat, Feb 8, 2014 at
They make them in all sorts of current / voltage ratios. You'll
typically see 100:1, 500:1, 1000:1, etc. Just adjust based on load and
your ADC.
Looks like Dwyer has a line that conveniently falls into the DS2438
input range of 1-10V:
http://www.dwyer-inst.com/Product/ProcessControl/CurrentTra
Colin:
> Get yourself any good CT like this: https://www.sparkfun.com/products/11005
You can see that that produces 300mV at 60A which is not enough voltage for any
1-Wire voltage sensors I know of.
-dan
--
Managing the
Not 1wire, but an interesting project : http://www.ladyada.net/make/tweetawatt/
Get yourself any good CT like this: https://www.sparkfun.com/products/11005
If needed, a simple voltage divider will cut this down to something measurable.
Standard practice for AC monitoring in panels in the industr
In theory, you should be able to take a very ordinary split core (the "clamp"
part) transformer, such as this:
http://www.onsetcomp.com/d-image/large/75-AMP-Mini-Split-core-AC-Current-Transformer_T-MAG-0400-75.jpg
which generates a small AC voltage proportional to the current, and put a
Here's one:
http://www.ibuttonlink.com/products/ms-tc
It looks like it's a 20A version, but you should be able to change the
coil and go to 30A. They say it is not calibrated but gives in the 3%
range for accuracy, which is about what I would expect. If I were
serious, I would calibrate each on
On Sat, Feb 08, 2014 at 11:24:27AM -0400, Daniel MacKay wrote:
> Hello all!
>
> Does anyone have an inexpensive (say, under $50 type of thing) 1-Wire AC
> amp (clamp type, obviously) sensor solution?
>
> I need to measure common household amps - so up to, say 30A would be fine,
> say, with 0.5
Hello all!
Does anyone have an inexpensive (say, under $50 type of thing) 1-Wire AC amp
(clamp type, obviously) sensor solution?
I need to measure common household amps - so up to, say 30A would be fine, say,
with 0.5A accuracy (or so.)
Any thoughts would be welcome.
-dan
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