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Old 11-05-2007, 10:05 PM #1
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Default My Home Brew BLuRay

I received the PS3 module from the group buy late last week. *I had a busy weekend so this project had to wait until today (I had a day off). *

I debated what host to use and what power source. Since I only ordered one assembly, I had to be extra careful not to screw it up so I opted for a safe route. Since the current draw is low and long run-time is not a major issue, I opted for a 9V battery solution. *I used the same home brew driver that I made for the GB red diodes but with a different set current. *The chip I used is the MC33269D in an SO-8 package. It performs similar in function to the LM317 but the dropout voltage is 1 volt instead of 2.5-3V.

To start, I worked out the maximum current I wanted the BLD to see. *I chose 60mA, so the minimum resistance had to be 20.8ohms (=1.25V/0.06A). *Since I didn't have a surface mount 20 ohm resistor, I used two 10 ohm resistors in series. *I have some 10ohm, 20 turn trimmer pots so I used one of those to set the minimum current to 42mA (1.25V/30ohms). *I drilled a small hole to allow for modification of the drive current. *I laid out the board to fit the enclosure and went to work etching a board. *After soldering on the components, I tested and installed it.

Here are some pics:

Front


Rear


Side


Adjust (40-60mA)


Inside


Inside


Inside (Board view - pot is on the back of this board). *The hot melt glue ensures no stress is put on the legs of the LD.


Oh, and yes, it will light wooden and paper matches. *



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Old 11-05-2007, 10:14 PM #2
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Default Re: My Home Brew BLuRay

Some people must have a magic touch...lol...I still can't light a match.
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Old 11-05-2007, 10:18 PM #3
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Default Re: My Home Brew BLuRay

Did I mention that I didn't even sharpie the red paper match?

Quote:
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Some people must have a magic touch...lol...I still can't light a match.
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Old 11-05-2007, 10:25 PM #4
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Default Re: My Home Brew BLuRay

Chimo --

Did you measure the actual LD current ?? 60 mA !!!! That's more than I ever put to mine and mine went bad (I think) at 45 mA

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Old 11-05-2007, 10:31 PM #5
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Default Re: My Home Brew BLuRay

were did you get that case?
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Old 11-05-2007, 10:37 PM #6
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Default Re: My Home Brew BLuRay

I calculated the current via the measured voltage across one of the seires connects 10 ohm resistors.

62mA full open - lights matches.

Just backed off to 50mA - does not light matches. But still looks really cool!

Paul

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Old 11-05-2007, 10:39 PM #7
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Default Re: My Home Brew BLuRay

Quote:
Originally Posted by toked323
were did you get that case?
I picked it up at a local electronics dealer. It's manufactured bu Hammond.
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Old 11-05-2007, 10:48 PM #8
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Default Re: My Home Brew BLuRay

nice looking!
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Old 11-05-2007, 10:59 PM #9
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Default Re: My Home Brew BLuRay

what the place called?
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Old 11-05-2007, 11:06 PM #10
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Default Re: My Home Brew BLuRay

Quote:
Originally Posted by toked323
what the place called?
Active Electronics (an affiliate of Future Electronics).
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Old 11-05-2007, 11:15 PM #11
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Default Re: My Home Brew BLuRay

can you buy from them online?
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Old 11-05-2007, 11:19 PM #12
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Default Re: My Home Brew BLuRay

do you have any cases like that you want to sell? ;D
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Old 11-05-2007, 11:19 PM #13
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Default Re: My Home Brew BLuRay

Quote:
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can you buy from them online?
If you google "hammond manufacturing", your will find what you are looking for.
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Old 11-05-2007, 11:25 PM #14
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Default Re: My Home Brew BLuRay

thanks i plan on making my bluray like that once i get my assembly nice job
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Old 11-05-2007, 11:32 PM #15
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Default Re: My Home Brew BLuRay

With my luck if I go as high as 62ma's it will blow up. The highest I have gone is 52ma's.
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Old 11-06-2007, 12:21 PM #16
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Default Re: My Home Brew BLuRay

I have ordered another PS3 assembly. I may get more creative with the next one.

Small host, AA or AAA powered boost circuit. I have a spare Fenex L0P SE, perhaps I'll use it and swap the guts with an ArcAAA-type circuit. I'll have to check the output waveform to see how much ripple and overshoot there is at turn-on.
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