Re: Earlier 1980 optical mice circuit

From: silverdr_at_wfmh.org.pl Date: Sun, 19 Nov 2017 19:06:44 +0100 Message-Id: <7E4EFBDE-1C45-4F64-97A6-5397ABC3DEAB@wfmh.org.pl>

> On 2017-11-19, at 18:58, Francesco Messineo <francesco.messineo@gmail.com> wrote:
> 
>> Optical mice shine an led on the surface and then watch the surface move.
>> They weren't available in 1980
> 
> In 1982 for sure, SUN optical mouse for example (I have a few of them).
> The "trick" is that they required a special metal pad with a special
> pattern (cross lines) to function.

Precisely. Although I thought they came in the second half of the eighties.

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