[sdiy] (somewhat OT) Physics question

[Trevor Page]

Hi Tim and all,

I was thinking of doing exactly the same thing recently, but in actual
fact the wavelength of these UV LEDs (370nm ish) is significantly higher
than the wavelength you need for EPROM erasure (optimum 253.7nm). I made
the guess that leaving the EPROMs in the sun for a couple of weeks might
be more effective than using these.  

In the end I bought a kit to build a conventional eraser from
www.magenta2000.co.uk. After spending ages winding the transformers for
the tube driver circuit, I got it working..

This ain't really OT to me, cuz I needed to blank 27C256's for my TR-909
clone :o)

Cheers

Trev


-----Original Message-----
From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl] On Behalf Of Tim Ressel
Sent: 15 February 2003 07:52
To: Synth-Diy
Subject: [sdiy] (somewhat OT) Physics question


Yo,

I noticed BG Micro has ultraviolet LEDs. I need an
eprom eraser but cannot afford one. Can you use UV
LEDs to erase eproms?? The wavelength seems right. The
exposure time may be a bit on the long side. And yes,
you have to build it in metal because the UV will eat
away at plastic.

Any thoughts??

--Tim

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