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retrobrad Administrator
Joined: 08 Jun 2007 Posts: 1039 Location: NSW, Australia
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Posted: Mon Jul 23, 2007 10:32 pm Post subject: My portable NES system |
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So my next mod is going to be a portable nes console made from the NOAC - NES on a chip.
ive already got the NOAC, and i have just bought a 5" lcd screen from ebay so it's going to be a rather large handheld console! ill post more details as i progress through the modification so check back for updates and pics!
-brad |
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retrobrad Administrator
Joined: 08 Jun 2007 Posts: 1039 Location: NSW, Australia
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Posted: Wed Jul 25, 2007 6:31 pm Post subject: |
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I have just bought a 5 inch LCD screen for my mod.
thats one heck of a big screen for a handheld console! its coming in the mail so ill have to wait till it arrives before i can do anything |
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retrobrad Administrator
Joined: 08 Jun 2007 Posts: 1039 Location: NSW, Australia
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Posted: Tue Jul 31, 2007 7:59 am Post subject: |
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retrobrad wrote: |
I have just bought a 5 inch LCD screen for my mod.
thats one heck of a big screen for a handheld console! its coming in the mail so ill have to wait till it arrives before i can do anything |
well the screen FINALLY got here yesterday. its a great size for a portable system!
now i just have to try and make things fit... hmm thats the tricky part.
I wish i had one of those plastic mould / cutting machines that ben heck does, it would make things soo much easier!
ill let you know how things go. |
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retrobrad Administrator
Joined: 08 Jun 2007 Posts: 1039 Location: NSW, Australia
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Posted: Tue Jul 31, 2007 9:15 pm Post subject: |
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I have done a bit of experimenting with the screen today, i found that it draws about 750mA of current in normal use. I then tested it with the backlight off and it only draws 200mA of current! thats a huge saving of 550mA!!!!
so im going to try and modify the backlight and use white LED's in place of the old power hungry light. So ill see how it goes, after all, it is a portable system running on batteries... |
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retrobrad Administrator
Joined: 08 Jun 2007 Posts: 1039 Location: NSW, Australia
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Posted: Thu Aug 02, 2007 7:50 pm Post subject: |
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Okay ive been doing some more work on my mod this week.
i found out before that the original backlighting drew 550mA of current (which is HUGE if im going to run it off batteries!)
so ive experimented with using bright white 3mm leds to get a good backlighting. Ive ended up using four leds connected in parallel, and then a 10ohm series resistor to limit the current a little bit.
it ended up working quite well (not as bright as the original but still very useable)
and the total current draw comes to only 150mA (a saving of 400mA)
so im pretty happy with it, heres some pics of the progress:
heres the lcd screen
The screen opened up
Heres the opened backlighting
the 3mm leds installed
Just Testing!!! (note, there arent normally lines in the screen - its just the camera!
Power connected
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