From: Gabriele Bozzi (mabuse68_at_gmail.com)
Date: 2006-07-16 18:28:20
Oh dear...
Once I tried, really, but one week later I went down to town to buy
my eprom eraser!!
Eproms are one of the most fabled ant FUDded item of electronics, I
found a no-nonsense guide to Eproms at this address:
http://www.xtronics.com/memory/how_EPROM-works.htm
It is really well written and, as far as my knowledge on the matter
goes, fairly accurate.
Anyway your answer is: depends on the weather, altitude, latitude,
season and humidity, just some short calculations (which do not
pretend to be assertive, do not flame me):
- A common eprom eraser like mine takes 5 minutes to bring all 1s to
surface.
- A mid-summer Northern emisphere location at Sea level, 60%
humidity, sunny exposure (75% of total sunlight): ~ 15 days
But you could be particularly lucky and live on top of the Matterhorn
(or, in your case the Kebnekajse I suppose), as I said: your mileage
may vary by mean of a lot of parameters.
;-)
Gabriele
On 16 Jul 2006, at 17:56, Spiro Trikaliotis wrote:
> Hello,
>
> I just successfully programmed some EPROMs of mine (27C256).
>
> Ok, this is not very interesting in itself. Anyway, now, I wanted to
> clear them again. Thus, yesterday, I put them in the sun (the whole
> day). I hope them to be empty, but they are not. Both still contain
> very
> many of the programmed bytes.
>
> Does anyone here have experience how long I need to put them in the
> sun
> to completely erase them?
>
> Regards,
> Spiro.
>
> --
> Spiro R. Trikaliotis
> http://www.trikaliotis.net/
> http://opencbm.sf.net/
>
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