Thanks for all your support! Relatively Universal ROM Programmer shield kit Rev1 now in stock: www.imania.dk/samlesaet-hobbyelektronik-og-ic-er-relatively-universal-rom-programmer.htm Questions? Join the free clubhouse on Discord: discord.gg/kmhbxAjQc3
Love the safety considerations for the UV radiation. Also the USB-PD usage. My bodged-together setup uses a UV-C LED and a 555 timer driving a boost converter to take 5V up to 9-ish to overcome the forward voltage of the diode. This is far more elegant and less hacky :)
As mentioned in your other video I think your project is a great service to the DIY community. Many retro computer and reverse engineering projects are faces with older EPROMS and serial EEPROM programmers are mostly unable to read them. If you ever redesign the PCB my suggestion is to have all the jumpers and links on the exposed side.
Looks good. UV lamps are something you don't want to sun tan with. I have your 65uino kit. Looks great. I have been busy fixing up/ Cleaning up this room. I like it nice. I am a bit of a neat freak. I enjoyed this video, and I wont star at any UV lamps.
nice work .. I have since tested the cheap phone sterilizer and it works too .. the positioning of the chips is a bit awkward but with some blue tack it works fine
@@VVerVVurm Ah! I believe I’ve seen those tubes too, those should work just like this - but the first many results from the markets show LED versions .. which I guess are also less effective at their advertised purpose.
It's worth mentioning that some of the Chinese units are somewhat electrically unsafe, especially those that come with an American plug and EU adapter.
While you certainly don’t want to stare at UVC, the light output of this dinky little lamp isn’t going to cause permanent damage after a brief glance. People survive exposure to massively higher doses of UVC with only reversible injury (like the multiple events in Asia where event promoters unwittingly used dozens of UVC lamps as decorative lighting, so people were exposed to vastly higher luminous flux for hours). You can get a sunburn, and you can get eye damage, but it’s not permanent and will heal in a few weeks.
Here a group of university students were hospitalized after close contact with a sterilizer. Mild symptoms. I’m not speaking from experience but I’ve heard you can get permanent eye damage because it doesn’t hurt to stare at it for too long - so you definitely want it covered up in case a child finds it in 20 years. Happy to hear it’s hard to do accidentally if you already know not to stare at it :)
I've built my eraser using a T8 UV lamp - whatever was able to find. But now I can erase ten EPROM simultaneously 😅 Also, when you erase UV EPROMs - always short all the leads together (e.g. using a piece of foil). UV light induces a current (photoelectric effect) which may damage the chip
Yup, I've noticed the T8's - actually I could've just replaced the tubes in my "UV-B" lamp with those but this was... somewhat insignificantly.. cheaper :) Wouldn't shorting all the pins make it worse - letting current flow where it doesn't belong? My logic can be very flawed. I wonder why the datasheets don't mention this.
@@AndersNielsenAA All UV erasers I have ever seen had conductive foam in the tray. I think the risk of photoelectric charge build up will be low. Shorted, resistive or open pins will probably all work fine.
Thanks for all your support!
Relatively Universal ROM Programmer shield kit Rev1 now in stock: www.imania.dk/samlesaet-hobbyelektronik-og-ic-er-relatively-universal-rom-programmer.htm
Questions?
Join the free clubhouse on Discord: discord.gg/kmhbxAjQc3
Love the safety considerations for the UV radiation. Also the USB-PD usage. My bodged-together setup uses a UV-C LED and a 555 timer driving a boost converter to take 5V up to 9-ish to overcome the forward voltage of the diode. This is far more elegant and less hacky :)
I like the 555 as boost regulator - haven’t tried that.. yet :D
As mentioned in your other video I think your project is a great service to the DIY community. Many retro computer and reverse engineering projects are faces with older EPROMS and serial EEPROM programmers are mostly unable to read them.
If you ever redesign the PCB my suggestion is to have all the jumpers and links on the exposed side.
Thank you :) I like to help where I can.
Thank you for sharing the design and testing process. It helps us beginners understand and learn quicker.
Looks good. UV lamps are something you don't want to sun tan with. I have your 65uino kit. Looks great. I have been busy fixing up/ Cleaning up this room. I like it nice. I am a bit of a neat freak. I enjoyed this video, and I wont star at any UV lamps.
Regularly in Finland school kids and others make bird nesting boxes. Looks line your UVC enclosure with an extra hole.
I think the school children might take offence with that statement :D I'm really not proud of my box - but at least it works.
nice work .. I have since tested the cheap phone sterilizer and it works too .. the positioning of the chips is a bit awkward but with some blue tack it works fine
That's actually surprising, since I assume they have UV LED's - which are crazy expensive in the
@@AndersNielsenAA well mine has a U-shaped quarz gas discharge light on either end
@@VVerVVurm Ah! I believe I’ve seen those tubes too, those should work just like this - but the first many results from the markets show LED versions .. which I guess are also less effective at their advertised purpose.
I think it’s a great project 😊
Maybe adding metal foil tape onto the walls of the wooden box would make erasing faster by also reflecting light that would otherwise not hit the chip
And/or the lid too. Good idea!
It's worth mentioning that some of the Chinese units are somewhat electrically unsafe, especially those that come with an American plug and EU adapter.
Also not great to open a drawer full of mercury dust when you get it in the mail.
While you certainly don’t want to stare at UVC, the light output of this dinky little lamp isn’t going to cause permanent damage after a brief glance. People survive exposure to massively higher doses of UVC with only reversible injury (like the multiple events in Asia where event promoters unwittingly used dozens of UVC lamps as decorative lighting, so people were exposed to vastly higher luminous flux for hours). You can get a sunburn, and you can get eye damage, but it’s not permanent and will heal in a few weeks.
Here a group of university students were hospitalized after close contact with a sterilizer. Mild symptoms.
I’m not speaking from experience but I’ve heard you can get permanent eye damage because it doesn’t hurt to stare at it for too long - so you definitely want it covered up in case a child finds it in 20 years.
Happy to hear it’s hard to do accidentally if you already know not to stare at it :)
I've built my eraser using a T8 UV lamp - whatever was able to find. But now I can erase ten EPROM simultaneously 😅 Also, when you erase UV EPROMs - always short all the leads together (e.g. using a piece of foil). UV light induces a current (photoelectric effect) which may damage the chip
Yup, I've noticed the T8's - actually I could've just replaced the tubes in my "UV-B" lamp with those but this was... somewhat insignificantly.. cheaper :)
Wouldn't shorting all the pins make it worse - letting current flow where it doesn't belong? My logic can be very flawed. I wonder why the datasheets don't mention this.
@@AndersNielsenAA All UV erasers I have ever seen had conductive foam in the tray.
I think the risk of photoelectric charge build up will be low.
Shorted, resistive or open pins will probably all work fine.
Thanks for the insight - I didn't really have much experience to go on for this little project.