How did you erase an EEPROM with sunlight? :-)

-----Original Message-----
From:   Peter L. Peres [SMTP:plp@ACTCOM.CO.IL]
Sent:   Thursday, 05, November, 1998 07:27 AM
To:     PICLIST@MITVMA.MIT.EDU
Subject:        Re: 12C509-JW How long to erase?

On Wed, 4 Nov 1998, Tony Nixon wrote:

> Brian Striggow wrote:
> >
> > Some pretty basic eprom erasure questions:
> >
> > What is the effect of direct or indirect sunlight on eproms??
> >
> > In the absence of a UV source, could direct sunlight be used to erase an
> > eprom??
>
> When I first started messing around with EEPROM's all I had to erase
> them was the sun. So, yes it does work, but you need a sunny day with no
> clouds, and it will erase in a few hours. On cloudy days, forget it.

Ouch ! That ozone hole must be really big. When was this ? It takes at
least 420 nm to start erasing and it takes less than that to start a skin
cancer.

Peter