Re: Clearing EPROMs: How much time to lay in the sun?
Date: 2006-07-16 19:45:29

On 2006-07-16, at 18:26, Rainer Buchty wrote:

>> Does anyone here have experience how long I need to put them in  
>> the sun
>> to completely erase them?
> Months to years. And even then...
> You should use a dedicated UV EPROM eraser.
> Maybe your grandma has one of those ancient "home tanners" (the ones
> which will cause skin cancer over time due to heaviest UVA and UVB
> emission) -- they (i.e. the old ones, not newer models with dedicated
> filters) usually work also.

That's what I always used... but the problem was that it was made to  
"imitate" the sun and as the sun itself it emitted a lot of IR, next  
to UV, which made the chip extremely hot during the erasing process.  
I even tried to decouple the heaters from the UV lamp but it was  
constructed in such a "clever" way that I found it not worth to try.  
Still it worked and I never fried neither melted the ICs with it. :-)

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