"Urambo Tauro" (urambotauro)
09/01/2018 at 13:00 • Filed to: tools, Toolopnik
1
9|
"Urambo Tauro" (urambotauro)
09/01/2018 at 13:00 • Filed to: tools, Toolopnik | 1
| 9 |
Not going to fix it, but I think I can use some of these parts...
This old Norcent DP300 DVD player has been in faithful service since 2002. Last year, it failed to eject discs anymore. Alright, fine. I suppose I put off getting a Blu-Ray player long enough...
But first, I want my Guardians of the Galaxy Vol. 2 disc back.
So I took it out to the garage for disassembly. I opened the case, peeled back the VOID WARRANTY IF REMOVED stickers, and unscrewed the top plate to free my disc.
I closed it back up and had every intention of eventually dropping it off at a Best Buy or something so that they can recycle it. But I kept putting it off and putting it off...
!!! UNKNOWN CONTENT TYPE !!!
I remembered this DVD player again the other day and decided to take it apart one more time. Maybe I’ll find some parts that I can salvage. Sure enough, I found something that will indeed prove useful.
Now I’m still very much a noob when it comes to electronics, but I c an read enough of the power board to see that it’s nothing more than a power supply. Not only do the inner workings of the DVD player all operate off of DC voltage, but there are multiple DC voltages provided by this board. I can d e f i n i t e l y use this.
As you can see printed on the board, this 6-pin connector sends both 5V and 9V power to the “computer”. Unfortunately the 12V hole on the board doesn’t have a pin. But by following the traces on the underside of the board, I discovered that power is also being sent through the 4-pin harness too. The red wire sends 5V to the tray/laser board, and the yellow one is 12V (the two black wire between them are grounds). 5V, 9V, 12V... these are all common enough voltages that I’m sure I will find a use for this in the future. Either as a permanent power source for something, or as a handy little power supply for bench-testing things.
Each of these power circuits (when live) generate a little more than their nominal voltage, which means that this can be used as a charger. For example, I’m seeing 13.1 volts on the 12V circuit. But how many amps? Will this thing deliver a 10amp charge? 2 amp? Trickle charge? Haven’t tested it out yet, but FWIW the top plate that goes over the tray spec’s 1.0A for 5V and 1.5A for 12V, so it’s probably close to that..
Also, note that the two 9V terminals offer different polarities. Why? I’m guessing that one is for opening the disc tray, and the other for operating the tray motor in reverse to close it.
Since the power supply board is over on one side of casing, I decided to cut the case down to fit. I also saved part of the other end, so that I can stitch it to this one to make a nice small enclosed multipurpose power supply. I’ll have to figure out some way of mounting easily-accessible ports for each branch of DC output so that I can keep it enclosed.
But what about the rest of the DVD player’s guts? Do I have a use for them? Probably not. These other circuit boards look a lot less user-friendly, so I’ll probably just pitch them.
Does Best Buy take in disassembled electronics for recycling? I’d rather do that than chuck ’em in the trash.
There are a few more components I might keep, though. I don’t think I have a use for the switches, but I might just repurpose the LEDs as power indicators for each of the output circuits.
It also has an IR sensor, and I do still have the remote, but that circuit goes straight back to the computer board, and I don’t think I can do anything with it.
The tray mechanism has 3 motors on it- one for the tray/door, one to spin the disc, and another to move the laser around. Maybe I’ll hold on to the tray motor for a little while, and makea fan out of it or something.
What about that laser, though? Can I use that? Would it be visible enough to use as a pointer for my saw or something? I’m not even sure what voltage it’s supposed to run off of, and I’m having a hard time following the circuitry to figure it out. The ribbon cable coming off of it is pretty delicate too. Not sure how I would go about wrangling those pixies. But I think it would be a neat component to keep, if I can use it.
No big deal if I can’t, though. I’ll still be plenty satisfied at getting a nifty little power supply box out of this. It even has an on/off switch!
Tekamul
> Urambo Tauro
09/01/2018 at 13:39 |
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Recycle the pcbs. They have value, and also based on their age, probably have lead on them, so they shouldn’t go in the trash.
I expect that power supply supports very little power, but it should have a part number on it so you can get the spec sheet.
The read laser is red, but kind of weak.
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Urambo Tauro
> Tekamul
09/01/2018 at 13:55 |
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A
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,
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a
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!
Good call
.
Y
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se need to be
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.
BaconSandwich is tasty.
> Urambo Tauro
09/01/2018 at 14:53 |
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Ever seen a mini laser engraver (or CNC machine) made out a DVD tray? It’s pretty ghetto, and not really that useful (might as well do a job properly if you are going to do it), but still entertaining. The engraver still requires buying a more powerful laser diode.
tpw_rules
> Urambo Tauro
09/01/2018 at 16:46 |
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The power supply won’t be able to supply more than a couple amps. Frankly, as someone who has money, I wouldn’t use this. Too dangerous, but maybe you can make it permanent for something. I wouldn’t expect to find a part number for it though. They would do an in-house design for something as mass-market as this.
The ±9V supply is for analog stuff. The audio components will likely use it, plus also the guts of the laser and its decoder (though that board may have its own supply). It probably can’t supply more than a couple hundred milliamps, all that stuff is about voltage instead of current.
EDIT: so actually this looks suspiciously close to a standard PC DVD drive with a Molex power connector and 40-pin IDE interface
. I bet you could put it in an older computer and have a dope see-thru DVD
drive.
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Urambo Tauro
> BaconSandwich is tasty.
09/01/2018 at 16:48 |
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H
u
h
!
J
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f
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,
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thanks for bringing it up! T
h
a
t
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s
r
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a
l
l
y
c
o
o
l
.
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Urambo Tauro
> tpw_rules
09/01/2018 at 16:57 |
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W
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b
out it? T
he lack of fuse
p
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otection?
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efore p
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to actual use.
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tpw_rules
> Urambo Tauro
09/01/2018 at 17:01 |
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Just that it’s kind of out in the open. I wouldn’t really bother with fuses, the supply will blow before them.
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Urambo Tauro
> tpw_rules
09/01/2018 at 18:12 |
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Oh that. Yeah, I saved enough of the original casing to box it back up.
shop-teacher
> Urambo Tauro
09/01/2018 at 23:54 |
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That's pretty cool!