Chris,

On Sat, 12 May 2007 17:57:22 +0100, Chris wrote:

> 
> Has anyone used the following modules, or similar, with a PIC?
> 
> http://www.maplin.co.uk/module.aspx?ModuleNo=22965&doy=12m5
> 
> I want to build a device which measures the time between pulses on my 
> electricity meter, and send the result to a battery powered 
> logger/display unit and/or PC, and i'm hoping they will work.

They will send and receive data, but with no error checking.  To eliminate noise and spurious readings  you really need encoder/decoder chips as 
well.  Maplin has these:  http://www.maplin.co.uk/Module.aspx?ModuleNo=35636&&source=14&doy=18m5  but they're quite pricey and there are a series 
of them that are much cheaper - their part numbers start with "HT12" and end with a letter that varies with the particular function (encode/decode, 
and different address/data splits).

Rapid sell them:  http://www.rapidonline.com/products.aspx?tier1=Electronic+Components&tier2=Integrated+Circuits&tier3=Remote+%26+Comms  - the 
top-left two icons, if their search engine is that repeatable!).

You can get an HT12E / HT12F pair for about an eighth of the price of the ones Maplin have.
 
> My meter is one of these:
> 
> http://www.btinternet.com/~jon00/images/meter.gif
> 
> (1000 flashes per KWh)

Ah, I shouldn't bother with this project - the meter reading hasn't changed for days, so it must be stuck and you're not getting charged!  :-)))

Cheers,


Howard Winter
St.Albans, Herts


-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist