> Sorry, yes Scott.
> So at 100W load, the updates would be every 36 seconds.  (Please check my
> maths.)
> It is probable that most of the time I'll be using enough juice to get
> reasonably short update periods.
> I'll give it a go to find out.

> On 9 July 2012 15:27, Scott B <solar.sen...@gmail.com> wrote:

>> are you sure its one pulse per kWh? not 1 pulse per Wh?

>> On Monday, July 9, 2012 11:57:59 AM UTC+9:30, Ken wrote:

>>> Well I've moved into my new house and had a peek at the electricity
>>> meter.
>>> It has a one-pulse-per-kwhr LED, and another one whose purpose I'm not
>>> too sure of.

>>> But when I think on it more, while it would be nice to graph the exact
>>> usage over time, the LED isn't going to update too often under light
>>> load/usage.

>>> So I'd still like a power reading that updates frequently.
>>> The unit I have does it every 6 seconds, but isn't hugely accurate, and
>>> doesn't interface usefully to a computer.  (Only gives a history, in a
>>> proprietary format.)

>>> I think the electronics and maths etc are too much hassle to do from
>>> scratch (for a lazy person like me).
>>> -Needs to measure 3 phases of current, power factor, voltage, calculate
>>> instantaneous power on each, then send to a remote point.

>>> So if anyone is aware of any gear that can be bought for this purpose
>>> (at hobby type prices), I'd like to hear from you.
>>> Failing a bought unit, I'd need a fairly fast micro to measure all those
>>> values, compare phase and calculate, 3 times over.

>>> Ken.

>>> On 28 June 2012 13:23, Ken <k...@waggies.net> wrote:

>>>> Does anyone have experience with modern electicity meters?

>>>> Silicon Chip magazine has a circuit-ideas article on reading, sending,
>>>> & displaying, the one pulse per watthour LED on electricity meters.
>>>> (I didn't know there was one!)
>>>> It uses a Picaxe to send over 433MHz, and display on 7-segment digits.

>>>> My current electricity meter has the old turning disk.
>>>> The one in my new house is modern.

>>>> I have a gadget that measures the currents in three phases and sends to
>>>> a console inside.
>>>> But it is not too accurate (doesn't measure voltage or current phase),
>>>> and doesn't connect to a PC too well.

>>>> I feel a project coming on.

>>>> Ken.

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