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'[EE]: Here mousey, mousey !'
2001\03\05@035946 by Intellicorp001

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Hi All,

Can anyone point me towards a circuit diagram for a bog standard PC mouse ?
And where can I buy replacement guts for one ?

       Cheers,

       Wilson Logan.

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2001\03\05@051608 by Jinx

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> Can anyone point me towards a circuit diagram for a bog
> standard PC mouse ?

I had a sketch around here somewhere. The older ones are
basically two interrupters, microswitches for the buttons and
a custom micro with a few passives. You could figure a block
diagram out in 10 minutes, there's nothing complicated at all

> And where can I buy replacement guts for one ?

Get yourself into any service centre and if you ask nicely
you'll walk away with an armful of working mice with busted
leads (the most common fault and irrepairable, economically
speaking). Either that or grab an el cheapo from just about
anywhere and fillet it

Can I ask why you want to go to this trouble ?

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2001\03\05@113920 by Olin Lathrop

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>  Can anyone point me towards a circuit diagram for a bog standard PC mouse
?
> And where can I buy replacement guts for one ?

For $6 you just replace the mouse.  Nobody could sell you replacement parts
for that little.


*****************************************************************
Olin Lathrop, embedded systems consultant in Devens Massachusetts
(978) 772-3129, spam_OUTolinTakeThisOuTspamembedinc.com, http://www.embedinc.com

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2001\03\06@031719 by Intellicorp001

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Jinx,

  Thanks for the answer. Of course you're right. The cheapest place to get
the bits is probably out of a new mouse. Seems a shame to kill a new one
though. The idea of going to the service centre is very good. I'll check
that out.

  Unfortunately for confidentiality reasons I can't say just yet what I'm
doing with these mice but if it works out I'll let you all know.

       Thanks,

       Wilson Logan.



> Can anyone point me towards a circuit diagram for a bog
> standard PC mouse ?

I had a sketch around here somewhere. The older ones are
basically two interrupters, microswitches for the buttons and
a custom micro with a few passives. You could figure a block
diagram out in 10 minutes, there's nothing complicated at all

> And where can I buy replacement guts for one ?

Get yourself into any service centre and if you ask nicely
you'll walk away with an armful of working mice with busted
leads (the most common fault and irrepairable, economically
speaking). Either that or grab an el cheapo from just about
anywhere and fillet it

Can I ask why you want to go to this trouble ?

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2001\03\06@041855 by Jinx

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> Seems a shame to kill a new one

They feel no pain. And exactly what could they do to stop you :)
Think of it as very cheap R&D

>The idea of going to the service centre is very good. I'll check
> that out.

You should, at the very least you'll come away with what you went
in with. Seriously though, so much stuff is uneconomic to repair
these days and people are so eager to upgrade and leave "inferior"
or "outdated" products in the bin, it is worth pursuing

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2001\03\06@080616 by mike

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On Tue, 6 Mar 2001 09:16:59 +0100, you wrote:

Microchip had a reference design for a PIC based PS/2 mouse - it's
pretty old & I'm not sure if it's still on their website.

{Quote hidden}

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2001\03\09@080710 by Alan B. Pearce

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>   Thanks for the answer. Of course you're right. The cheapest place to get
>the bits is probably out of a new mouse. Seems a shame to kill a new one
>though. The idea of going to the service centre is very good. I'll check
>that out.

do not forget that you can get ordinary controls that look like pots, but have
an innards that is two switches producing the same sort of quadrature waveform.
Bourns (among others) make them, and they are available through RS Components
and the like. Typically have a detent, and 24 steps per rotation, just like the
front panel controls on a lot of test gear these days.

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