[sudo-discuss] TED The Energy Detective AC power monitors

[Patrik D'haeseleer]

I believe the power monitor that Marc installed was one from a whole box
full of these things that we had gotten donated a while back (Marc - that
correct?)

If so, we should have several dozen more of these to take apart and tinker
with, install throughout the Omni, or hand out to our friends and
neighbors...

The remainder are in two large plastic boxes that should be on the CCL Wall
O'Boxes, labeled something creative like "Power Monitors 1" and "Power
Monitors 2".

Patrik

On Thu, Aug 4, 2016 at 12:32 AM, Jake <jake at spaz.org> wrote:

> I opened up the black box that connects to the current-sense transformers
> included with The Energy Detective (TED) power monitor kits.
>
> it contains a CS5460 chip which is a "Single Phase Bi-Directional
> Power/Energy IC" which has a digital (SPI) data interface.  Unfortunately
> it does not have analog outputs, so it can't be used to convert the AC
> current signals coming into it into a simple DC analog value.
>
> http://pdf1.alldatasheet.com/datasheet-pdf/view/230848/CIRRUS/CS5460.html
>
> however, if someone finds a nice arduino library to talk to this chip, we
> can...
>
> wait no, that's pointless.  the chip is connected to a PIC16F627A which is
> processing the data from the CS5460 and then sending it out over the power
> lines using a TDA5051AT "Home automation modem" chip:
>
> http://www.nxp.com/documents/data_sheet/TDA5051A.pdf
>
> "The TDA5051A is a modem IC, specifically dedicated to ASK transmission by
>  means of the home power supply network, at 600 baud or 1200 baud data
>  rate. It operates from a single 5 V supply."
>
> it transmits Amplitude Shift Keying (ASK) data transmission using the
> electric power lines it's connected to.  basically it communicates at
> 8.48MHz (somewhere between 6.08 - 9.504 MHz) in binary serial
> communications.  so it should be pretty easy to figure out what it's saying.
>
> It could be that the box that the current sense transformers plug into
> just sends data (including its serial number, which is on a barcode label
> stuck to the box) and a displaybox (or our hack) picks it up or not.  But
> it's also possible that it waits for a displaybox to transmit a signal
> telling it to turn on, or asking it to supply a measurement on-command.
>
> since we have displayboxes and these current sense boxes, we can find out
> if we want.  and then we can measure power flow throughout the omni.
>
> -jake
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