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
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
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
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-
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
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
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
>
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
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 - 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
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
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
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
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
Paul,
How would you envision implementing a remote owserver over a WiFi module?
Colin
On 1/27/2014 10:54, Paul Alfille wrote:
> Honestly, the easiest way is a remote owserver. That can join your
> network seemlessly. You can even have a remote serial bus master and a
> long serial line.
>
> A re
Wow I thought I was the only energy monitor nerd around. Apparently there is a
lot of interest in this area. I plan to use one wire for temp A/C control with
a Rpie and have already built that circuit but have been also working on
monitoring the AC meater. for you EU folks there is a site whi
On 09.02.2014 22:13, Colin Reese wrote:
> Paul,
>
> How would you envision implementing a remote owserver over a WiFi module?
This is 100% easy and possible since many years, just take any
openwrt-router and run owserver on it.. Works pretty fine 24x7.
The other way around, low-power I'd more g
I want to run a microcontroller with a remote owserver or 1Wire devices.
I don't want/need another linux box. A cheap AVR and WiFi unit like an
XBee WiFi would be ideal. Is there not AVR code that would run owserver
over a WiFi module?
Where can I find docs on owexternal? I've seen mention of i
Like this:
http://www.etherweather.com/
But actively developed and wireless.
Colin
On 2/9/2014 13:41, Michael Markstaller wrote:
>
>
> On 09.02.2014 22:13, Colin Reese wrote:
>> Paul,
>>
>> How would you envision implementing a remote owserver over a WiFi module?
> This is 100% easy and possib
On 09.02.2014 22:48, Colin Reese wrote:
> I want to run a microcontroller with a remote owserver or 1Wire devices.
> I don't want/need another linux box. A cheap AVR and WiFi unit like an
> XBee WiFi would be ideal.
Nearly any TP-Link running OpenWRT is cheaper than the single
XBee-Module? Not t
Well, I want a cheap, small, low-power, bullet-proof sensor node. I want
to be able to read loads of them, preferably in a developed, extendable
framework, from a central sensor gateway, at the moment an RPi-based
control unit. Nothing seems to meet all of the criteria.
Standard XBee would work
Well, if you want lowest power, small nodes I'd recommend to Google for
Contiki/6lowpan first. Integration into owfs should be really easy..
Just need one GW.
If you want low cost, existing HW and proved reliability, I guess your
better off using a $20 OpenWRT-routers simply running owfs/owserver ;
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