Searching \ for 'Erasing EPROM' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/index.htm?key=erasing+eprom
Search entire site for: 'Erasing EPROM'.

Truncated match.
PICList Thread
'Erasing EPROM'
2000\01\03@024137 by Stephen Inkpen

flavicon
face
I am looking for the cheapest way of erasing a couple of 27C512 eproms. Would
positioning the chips under a ordinary party black light for a couple hours
work?  I have access to an ordinary bulb and a blacklight florescent fixture.
What would be better to use if it would work?

Stephen Inkpen
spam_OUTsinkpenTakeThisOuTspamroadrunner.nf.net

2000\01\03@041426 by Graeme Zimmer

flavicon
face
Hi Steve,

> I am looking for the cheapest way of erasing a couple of 27C512 eproms.
Would
> positioning the chips under a ordinary party black light for a couple
hours
> work?  I have access to an ordinary bulb and a blacklight florescent
fixture.
> What would be better to use if it would work?

No, a "blacklight" tube has no useful ultraviolet output, just lots of deep
purple.

But if you go buy a replacement "Gemicidal" tube it will work very well...
(germicidal tubes have a completely clear glass).

Just be careful not to look at it or you will get the worst case of "welders
flash" or worse.

You should build a box to enclose it which prevents the power being
connected till the lid is completely closed.

Remember, these things are DANGEROUS.

regards ............ Zim

2000\01\03@043749 by Peter Keller

flavicon
face
Stephen
either will work, even exposing the chips to sunlight. It all depence on the time
of exposition.
Proceed as follow:
Expose the chips a certain amount of time, say 1/2 hour. Then check the chips for
beeing ereased.
Repeat until all chips are ereased and count the cycles. Then add another number
of cylcles, say 20%
to get more safety.
Regards
Peter Keller

Stephen Inkpen schrieb:

> I am looking for the cheapest way of erasing a couple of 27C512 eproms. Would
> positioning the chips under a ordinary party black light for a couple hours
> work?  I have access to an ordinary bulb and a blacklight florescent fixture.
> What would be better to use if it would work?
>
> Stephen Inkpen
> .....sinkpenKILLspamspam@spam@roadrunner.nf.net

2000\01\03@073337 by Russell McMahon

picon face
Sunlight is cheapest - may take days depending on chip and where you are.

INSERT CHIPS IN CONDUCTING FOAM !!!
IC's in nice warm dry location like this will be extra ESD sensitive. We at
one time long ago often erased ICs on a window ledge in sunlight.
Many died until we placed an earthed metal plate under them.
After that none died ! :-)



     Russell McMahon
_____________________________

>From other worlds - http://www.easttimor.com
                               http://www.sudan.com

What can one man* do?
Help the hungry at no cost to yourself!
at  http://www.thehungersite.com/

(* - or woman, child or internet enabled intelligent entity :-))


{Original Message removed}

2000\01\03@083819 by Peter L. Berghold
flavicon
face
On Mon, Jan 03, 2000 at 08:03:43PM +1100, Graeme Zimmer wrote:
> But if you go buy a replacement "Gemicidal" tube it will work very well...
> (germicidal tubes have a completely clear glass).
>

You have a supplier for these gems?  I haven't been very successfull in
finding them.

TIA
--
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Peter L. Berghold                        PeterspamKILLspamBerghold.Net
"Linux renders ships                     http://www.berghold.net
NT renders ships useless...."

2000\01\03@141746 by Robert.Rolf

picon face
On Mon, 3 Jan 2000, Peter L. Berghold wrote:
> On Mon, Jan 03, 2000 at 08:03:43PM +1100, Graeme Zimmer wrote:
> > But if you go buy a replacement "Gemicidal" tube it will work very well...
> > (germicidal tubes have a completely clear glass).
> >
>
> You have a supplier for these gems?  I haven't been very successfull in
> finding them.

Visit a contact lens shop. They use the bulbs in their client 'lenses
sterilizers'.

2000\01\03@153144 by Henk Tobbe

flavicon
face
>
> > I am looking for the cheapest way of erasing a couple of 27C512 eproms.
When we still lived in the Netherlands we had a sunlamp-bed to keep a bit of
a tan in winter..  I (mis) used the thing to erase eproms. Especially the
face part used essentially the same sort of tubes as were used in exposure
beds for foto-pcb exposure. It took just a little bit longer than a
UV-eraser. May be you can take a few chips "to bed" with you and keep a tan
as well.
Henk - VK2GWK
http://www.users.bigpond.com/tobbe/

2000\01\04@012613 by Jinx

face picon face
Last new ones I got were through Philips' lighting division, a couple
of 7W, quite cheap, sure you could find those the world over.

Jinx
:
{Quote hidden}

More... (looser matching)
- Last day of these posts
- In 2000 , 2001 only
- Today
- New search...