yep... found this out for myself when erasing PICs... spent a whole night
under a blacklight and the program was still perfectlty intact the next
morning )

I have heard you can erase in strong sunlight - but not thru a window as
most glass will block UVC

while on the subject, don't be tempted to have an un-enclosed UVC tube
switched on.. I did and even though it wasn't in direct line of sight, it
was off to one side, the next day my eyes hurt like hell - I had given
myself arc-eye!!! felt like sand in there for a day or two... still, learnt
my lesson )


"JeffM" wrote in message
om...
perhaps a black light can do it, eventually.
Thrashbarg

365nm black lights won't do it.
You need a 254nm source of sufficient intensity.
Radiation of this wavelength is not good for humans.
That is why EPROMS are inside an enclosure when being erased.


in the sun

Maybe with a lens and a visible light filter.