"First" digital camera

From: Ethan Dicks <dickset_at_amanda.spole.gov>
Date: Sat May 29 17:54:53 2004

On Sat, May 29, 2004 at 11:27:00PM +0100, Tony Duell wrote:
> > 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 the article... I don't know if Steve Ciarcia used a commercially
prepared chip or not, but I still have a ceramic/gold-lid 4116 that I peeled
the lid off myself and replaced with a slide-cover. I never built mine
into a camera body, but I did do a few experiments where I had an Apple II
with the cover off and changed how much light fell on the DRAM. I saw that
the effect basically worked, but never wrote any software to do image


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Received on Sat May 29 2004 - 17:54:53 BST

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