Author Topic: Yet another "Poor man UV EPROM eraser"  (Read 1047 times)

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Offline Canis Dirus Leidy

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Yet another "Poor man UV EPROM eraser"
« on: July 06, 2021, 02:41:21 pm »
Well, more correctly the description of an attempt (not my) to use cheap (about $2 without delivery) "UV Bulb Ultraviolet Ozone Germicidal Sterilization Quartz Light Clean Lamp" from Aliexpress for erasing EPROMs. The original description is in Russian, so here is the TL&DR:
  • Yes, it's really a mercury vapor lamp (so, be careful with customs).
  • And it's emitting hard enough UV: it took a minute and a half to erase M27C512, with direct contact of the IC window with the lamp bulb.
  • For a secure ignition, 15V DC is required (then, in the steady mode, it drops to 12V). The current consumption is 300 mA, it can be more (up to 700 mA), but the filament begins to overheat.
« Last Edit: July 06, 2021, 02:52:23 pm by Canis Dirus Leidy »
 

Offline Gyro

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Re: Yet another "Poor man UV EPROM eraser"
« Reply #1 on: July 06, 2021, 04:33:18 pm »
Yeah, I first saw those clever little low voltage UV lamps on Big Clive's channel. They're really neat as long as you're using them for sensible purposes.

Regards, Chris

"Victor Meldrew, the Crimson Avenger!"
 

Offline granzeier

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Re: Yet another "Poor man UV EPROM eraser"
« Reply #2 on: July 06, 2021, 08:01:16 pm »
Aliexpress says right off, that the item (UV light) cannot be shipped to the US. :(
 

Offline GigaJoe

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Re: Yet another "Poor man UV EPROM eraser"
« Reply #3 on: July 06, 2021, 08:13:24 pm »
what about UV 3W LED, i did use it for signetic, works well .....



 

Offline Canis Dirus Leidy

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Re: Yet another "Poor man UV EPROM eraser"
« Reply #4 on: July 07, 2021, 08:41:28 pm »
Aliexpress says right off, that the item (UV light) cannot be shipped to the US. :(
There are USAnian sellers on Ebay and Amazon who sell these lamps (search for keywords like "GTL3 UV bulb" or "E17 germicidal lamp"), but they also have USAnian prices ($10-15).
 

Offline granzeier

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Re: Yet another "Poor man UV EPROM eraser"
« Reply #5 on: July 07, 2021, 10:59:46 pm »
Aliexpress says right off, that the item (UV light) cannot be shipped to the US. :(
There are USAnian sellers on Ebay and Amazon who sell these lamps (search for keywords like "GTL3 UV bulb" or "E17 germicidal lamp"), but they also have USAnian prices ($10-15).
Thanks, I have one on order right now (and only $8.49.)
 

Offline helius

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Re: Yet another "Poor man UV EPROM eraser"
« Reply #6 on: July 08, 2021, 03:11:39 am »
The same bulbs are used in equipment on the US consumer market, so there is no issue with the bulbs being importable.
 

Offline BrokenYugo

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Re: Yet another "Poor man UV EPROM eraser"
« Reply #7 on: July 08, 2021, 04:07:27 am »
Aliexpress says right off, that the item (UV light) cannot be shipped to the US. :(
There are USAnian sellers on Ebay and Amazon who sell these lamps (search for keywords like "GTL3 UV bulb" or "E17 germicidal lamp"), but they also have USAnian prices ($10-15).

2 for $10, US warehouse.
 https://www.ebay.com/itm/174646112679

You can also get small 120V linear fixtures with bulb for similar money, that's what I did.
 

Offline David Hess

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Re: Yet another "Poor man UV EPROM eraser"
« Reply #8 on: July 08, 2021, 04:03:33 pm »
Was there debate about germicidal lamps being able to erase uvEPROMs?
 

Offline helius

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Re: Yet another "Poor man UV EPROM eraser"
« Reply #9 on: July 08, 2021, 04:35:25 pm »
Was there debate about germicidal lamps being able to erase uvEPROMs?
Not a credible one. The devices are designed to be erased using 253.7 nm light, the predominant wavelength of mercury gas discharge, which is what a germicidal lamp produces. There may be some differences in output characteristics between the traditional T8G style tubes and the miniature GTL3 bulbs, but they both emit the correct wavelength.
 


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