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Subject: Re: power on mod and access to the SC1 pin

Re: power on mod and access to the SC1 pin

From: sophana <>
Date: Wed, 5 May 2004 20:58:22 +0200

my (small) site is :

I reopened up my archos 2 days ago because of a bad sector and did forget to
have a look.

The mod before I did was for the bass improvement.

I would be VERY surprised if the atmels programmable IO are not
If you don want the pin to be driven just program it as an input.

<> a écrit dans le message de
> >Well so far. I've seen that you have a pretty similar environment as mine
> >(CDC simulator controlled by external uC). That means you do have also a
> >a external HW, don't you ?

> yes I use a pic for the sony unilink protocol and you?

I'm using an Atmel uC for the Panasonic CDC protocol.
During the next hours, there will be a site available with some more info,
that can be accessed via:

> >IMHO, it would be the easiest HW mod then simply shortcutting the ON
> >button by a transistor that is located in your external HW. You know
> >what I mean ?
> >
> >It would be like a second switch in parallel to the ON button that is
> >realised as a transistor and wired outside the AJB to your HW. The
> >transistor itself could then be controlled by your PIC.
> >
> >
> yes through the line in connector. Have you found an easy place to
> soldier a wire in the box?

As I already told, I never made big mods to my JB (only changed the HDD).
As I remember, the contact of the buttons is done with some rubber contacts,
equal to those in TV remotes.
I could imagine it should not be as difficult to solder a thin (maybe very
thin) wire on the other side of the board (not the contact side).

> no need for a transistor, just use the tristate function of the io pin
> to do open collector.

So using the JB's uC, or your one in your HW ?
Unfortunately Atmel uC's don't have tristate outs....



PS: Sorry for not be able to help more, sounds interesting.

Sent by: Matthias Klumpp
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Received on 2004-05-05

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