theinfamousbob
Member
(sorry for the bad title, but I'm a bit tired.)
Today I picked up a LCD screen for an overhead projector -- it's transmissive so light can pass through projected on a wall/screen/etc. Basically a poor man's digital projector. Did some research; it's capable of 800x600 @ 32 bit color. Pretty decent. Then I got an idea -- use it inside my computer case, where I can see the display while having a backdrop of computer components. Sat down, ripped the LCD and driver board out of the case, tested -- worked fine on supplied adapter. Fitted the LCD to the side of my case + glass, tested LCD with supplied adapter -- worked fine. Solder a +12V line and GND from my computer's PSU connector onto the board in place of the supplied +12V adapter -- no luck. There's a 7805 on the driver that overheats and goes into thermal protect. I can't figure out why the LCD just doesn't work off of my computer supply opposed to the supplied PSU. Both read within a hundredth of a volt (12.24V). Is it that the PSU brick that came with the LCD drops voltage when something is connected more so than my computer's supply? This one's got me stumped. Any ideas?
Thanks!
Today I picked up a LCD screen for an overhead projector -- it's transmissive so light can pass through projected on a wall/screen/etc. Basically a poor man's digital projector. Did some research; it's capable of 800x600 @ 32 bit color. Pretty decent. Then I got an idea -- use it inside my computer case, where I can see the display while having a backdrop of computer components. Sat down, ripped the LCD and driver board out of the case, tested -- worked fine on supplied adapter. Fitted the LCD to the side of my case + glass, tested LCD with supplied adapter -- worked fine. Solder a +12V line and GND from my computer's PSU connector onto the board in place of the supplied +12V adapter -- no luck. There's a 7805 on the driver that overheats and goes into thermal protect. I can't figure out why the LCD just doesn't work off of my computer supply opposed to the supplied PSU. Both read within a hundredth of a volt (12.24V). Is it that the PSU brick that came with the LCD drops voltage when something is connected more so than my computer's supply? This one's got me stumped. Any ideas?
Thanks!