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.  

Some people must have a magic touch...lol...I still can't light a match.

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

Gazoo said:

Some people must have a magic touch...lol...I still can't light a match.

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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

Mike

were did you get that case?

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

toked323 said:

were did you get that case?

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I picked it up at a local electronics dealer. It's manufactured bu Hammond.

nice looking!

what the place called?

toked323 said:

what the place called?

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Active Electronics (an affiliate of Future Electronics).

can you buy from them online?

do you have any cases like that you want to sell? ;D

toked323 said:

can you buy from them online?

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If you google "hammond manufacturing", your will find what you are looking for.

thanks i plan on making my bluray like that once i get my assembly nice job

With my luck if I go as high as 62ma's it will blow up. The highest I have gone is 52ma's.

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.