Re: Interesting Behaviour.

["steve" <steve@xxxxxxx>]

Ian,

Was this www.smarthomeusa.com ?

Would you have the part number ?

Steve.

----- Original Message -----
From: "Ian Lowe" <ian@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Wednesday, November 01, 2000 11:48 PM
Subject: [ukha_d] Interesting Behaviour.


> Folks,
> I suspect that the design of X-10 Lampmodules (at least, the Magnavox
ones)
> has changed slightly.
>
> I bought a bunch from Smarthome, and have been modding them to 240V,
without
> great success I have to say. A friend more electronically minded than
me
> (who is, basically, a complete genius in his own lifetime!!) looked at
the
> circuit, and pointed out that the schematic on Ido Bartani's site
didn't
> quite match my modules.
>
> We then checked the board over, and were surprised to find that a lot
of
the
> mods already seemd to be in place: severla of the resistors were
already
.5W
> versions, rather than .25, the Triac was a 600V rated on, rather than
400.
>
> In fact, the only components which were the "wrong" value
for 240V were
the
> C1 0.68u Cap (should be a .33), R1 (100ohm, should be 220) and the
MOV.
>
> When I changed the R1 and C1 values and ratings, it threw the 120khz
> oscillator off (it produces 270khz), so I tried swapping >only<
the MOV
for
> the 275V version.
>
> Hey presto, the module works fine at 240V without any other mods. It
gets
> warm, but not too bad Being a paranoid person, I won't leave these
guys
> plugged in unsupervised for a >long> time, but it does seem like
the
> Magnavox modules are shipping in a 240V capable state (apart from the
MOV,
> which obviously couldn't ever be rated 275V in a 110V country!)
>
> thoughts?
>
> Ian.
>
>
>
>
>



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