(03-03-2020, 09:44 PM)Robert Wrote: My version of Eprom eraser was a special flourescent tube in a standard batten. The eproms were placed in the tiny space between the tube and batten, a cardboard box placed over the top, then left on for a while. Can't remember how long it had to be irradiated (maybe 25 minutes? it's been too long ago)
This was a very common method in the 1970-1980's even used at the microbee factory. Rather than a standard sized batten, a desktop fluoro lamp with UV tube fitted was used and the ICs placed on the desk and covered by an internally silvered cardboard shroud.
Be careful when using UV light sources - exposure can be dangerous to the eyes and skin.
(03-03-2020, 11:30 PM)Ernest Wrote: Not as efficient, but a cheep alternative is an insect lamp (as used in outdoor Insect Zapper) these emit a reasonable amount of UV in the right frequency to do the job.
Typically my old lamp takes about a 25 hours to erase an EPROM, not 25 minutes, but all fine if you are not in a hurry.
Sunlight can also work if you have the patience of Jobe.
Modern LEDs are are much more efficient and now come in a variety of wavelengths particularly for agriculture where "LED recipes" are used to optimise the growth of the produce.
These recipes often exclude green thus the plant leaves look black under the LED light. Very strange!
https://www.we-online.com/catalog/en/WL-...TICULTURE/
https://www.we-online.com/catalog/en/WL-SUMW/
You can become your own CSI with this!
https://eshop.wurth.com.au/Product-categ...en/GB/AUD/