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.

Bit of an understatement. The wavelength of UV used to erase EPROMS is
murder to the eyes.

To build an eraser on a shoestring, the best thing to do is to buy a
replacement lamp c/w data sheet from someone like RS Components and design
and build your own power supply for it, and of course a totally lightproof
enclosure

Hope this helps.

Nemo
(Engineer and qualified Health and Safety rep.)