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WTB: EPROM Eraser

dhoelzer

Veteran Member
Joined
Oct 20, 2012
Messages
523
Location
New York
Thanks, dhoelzer. That's very nice of you to offer. I just got the programmer, so of course now I must have the eraser too! :)

I completely understand. I strongly warn you away from the cheap-o one that you can find on Amazon and eBay... greenish blue plastic with a white timer. Not only did mine arrive non-functional (Amazon) but the seller then asked if I would accept a partial refund... Absolutely insane.

I ended up buying one out of a lab that holds about 40 at a time.
 

gslick

Veteran Member
Joined
Dec 30, 2010
Messages
2,112
Location
Seattle, WA
If you look for a used one on eBay my recommendation would be to look for a good deal on a Logical Devices QUV-T8. There are a couple on eBay now in reasonable looking condition around $65-$70 OBO, including shipping. Sometimes you can find them a fair amount cheaper. I have a couple of those I have had for years and they seem to hold up well. One with a built in timer and one without. The built in timer can be a bit dodgy so I keep track of the erasure time myself.
 

FunctionalLimits

Experienced Member
Joined
Dec 29, 2013
Messages
174
Location
NY, NY, USA
I completely understand. I strongly warn you away from the cheap-o one that you can find on Amazon and eBay... greenish blue plastic with a white timer. Not only did mine arrive non-functional (Amazon) but the seller then asked if I would accept a partial refund... Absolutely insane.

I ended up buying one out of a lab that holds about 40 at a time.

Thanks for the heads-up. I think something like that did surface during my ePay searches, and it's always tempting to take a gamble when the price is so low.
 

phogren

Veteran Member
Joined
Apr 24, 2009
Messages
580
Location
Morro Bay, CA
Ditto on the cheap Ebay erasers. I have a Datarase II that works great. It doesn't have a timer so I use the timer on my Iphone. The cheapie I got from Ebay never did work correctly and was a total waste of time and money.
 

Maverick1978

Veteran Member
Joined
Mar 29, 2010
Messages
1,966
Location
Florida, USA
I'll give a +1 for the cheapie ebay eraser... both Chromedome45 and I have one and they work fine. I guess it's a YMMV thing :)
 

FunctionalLimits

Experienced Member
Joined
Dec 29, 2013
Messages
174
Location
NY, NY, USA
One can make one from a drier lamp and a current limit resistor.
Dwight

I thought about using a stock fluorescent tube fixture, which would give me the ballast, starter, etc., with a germicidal UV lamp and maybe a timer. These really aren't complicated devices. But by the time I get all the bits and pieces I would need to rig up something, since I don't have any of it on hand, the cost would already be close to the price of a used UV eraser. Plus I'd have to invest some time to assemble it, and I know I would spend way too much time trying to make a nice enclosure because I'm fussy about that kind of thing...
 

Chuck(G)

25k Member
Joined
Jan 11, 2007
Messages
40,245
Location
Pacific Northwest, USA
My first EPROM eraser was a coffee can, germicidal lamp from a clothes dryer and a standard 40w incandescent (as limiting resistor). I used it for several years.

The little 4W fluorescent germicidal lamps do a very good job also.
 

Tor

Veteran Member
Joined
Mar 14, 2011
Messages
984
Location
Norway/Japan
http://www.ebay.com/itm/221400793756?ru=http%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_sacat%3D0%26_from%3DR40%26_nkw%3D221400793756%26_rdc%3D1

I have for more than two years this and used it to erase tens of EPROMs ... and besides my wife is satisfied as well, 'cos she can sterilise toothbrushes from time to time.
How long does an erasure take with that device? It seems to have a timer which shuts off after 3 to 5 minutes (I thought it took longer to erase an eprom, but I haven't done that since the eighties so I don't really remember anymore)

-Tor
 

inakito

Experienced Member
Joined
Oct 5, 2011
Messages
293
Location
Spain
Using a small eraser 10 minutes is safe. But it depends on the lamp power. You may want to consider also the 28xx EEproms that can replace classic 27xx Eproms pin to pin. (Look for Atmel 28xx). You would need a suitable programmer though. With these you can erase a chip in a second a reprogram it immediately.

How long does an erasure take with that device? It seems to have a timer which shuts off after 3 to 5 minutes (I thought it took longer to erase an eprom, but I haven't done that since the eighties so I don't really remember anymore)

-Tor
 

SpidersWeb

Veteran Member
Joined
Feb 16, 2012
Messages
2,697
Location
New Zealand
Last edited:

Dwight Elvey

Veteran Member
Joined
Jun 21, 2003
Messages
4,804
Location
Santa Cruz
I have three EPROM erasers around the house.
Luckily it only takes me a couple hours to find one
when needed.
Dwight
 

archeocomp

Experienced Member
Joined
Apr 29, 2012
Messages
414
Location
EU/SK
How long does an erasure take with that device? It seems to have a timer which shuts off after 3 to 5 minutes (I thought it took longer to erase an eprom, but I haven't done that since the eighties so I don't really remember anymore)

-Tor

Depends on the EPROM type. Half of them are erased right after first shut off (your time estimate seems to be right). But I have had also some very tough ones, that needed aprox. 5 procedures.
 

Dwight Elvey

Veteran Member
Joined
Jun 21, 2003
Messages
4,804
Location
Santa Cruz
Make sure the window is truly clean. Gunk from a label that
covered the window can block a lot of UV light.
Dwight
 
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