I’ve used UV LED’s to build a PCB exposure unit, and that was very successful, so I thought I would see if a UV LED could be used to erase an EPROM.
As experiments go, it was rather a long shot. The UV LEDs I’ve got emit UV light at a wavelength of around 400nm, and EPROMs need to be exposed to UV light at around 250nm. However UV is UV so it was worth a try.
It didn’t work :(
In the end, it had around five hours of exposure and after reading back the EPROM contents, not even one bit had changed state. Still, I suppose it’s nice to know.
As experiments go, it was rather a long shot. The UV LEDs I’ve got emit UV light at a wavelength of around 400nm, and EPROMs need to be exposed to UV light at around 250nm. However UV is UV so it was worth a try.
It didn’t work :(
In the end, it had around five hours of exposure and after reading back the EPROM contents, not even one bit had changed state. Still, I suppose it’s nice to know.
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