"First" digital camera

From: Stan Barr <stanb_at_dial.pipex.com>
Date: Sun May 30 03:00:34 2004


ard_at_p850ug1.demon.co.uk (Tony Duell) said:

> > A little OT but certainly related: I had a 'camera' made by MicroMint
> > (Steve Ciarcia) made to work with an Apple ][. It was basically a
> > photo-eraseable EPROM and an adapter card for the Apple.
> I thought it was actually a DRAM chip with a transparent top (the number
> 'IS32 Optic RAM' is sort-of in my mind, but I can't be sure). Light
> falling on the storage capacitors causes them to discharge faster. You
> fill the RAM with 1s, wait a little bit, and read it out. The cells that
> read as 0s have had a lot of light falling on them. Then fill the RAM
> with 1s again, wait a bit longer. The extra cells that read out as 0s
> have had some, but less, light falling on them. Repeat for 8 or so times
> (to get 3 bits/pixel).

I remember reading about that being done for an astronomical telescope
camera - in the early '80s I think.
Stan Barr  stanb_at_dial.pipex.com
The future was never like this!
Received on Sun May 30 2004 - 03:00:34 BST

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