Just blew 4 diodes!!!

[Jimboy3625]

Wow, that's a great explanation Dennis, that should go into a sticky thread!

Thanks!
Jim

[polishedball]

Wow, that's a great explanation Dennis, that should go into a sticky thread!

Thanks!
Jim

or you should just know basic electronics ~

[whatsupadrian]

in your 6th picture it looks like your diodes arent in the mounts properly?

I thought this too, but those diodes don't seem to fit inside. The top of the can presses against the mount. I will do some tinkering today.

OK so I guess I will just order a different PSU and run the diodes in series. Would this be a good PSU for 4lpc826 @ 300mW each http://www.ebay.com/itm/DC-15V-5A-Sw...#ht_4000wt_952 Does anyone recommend a better PSU?

I got a few PMs from members looking for LPC-826. I got them from Glenn (scopeguy20) from this thread http://laserpointerforums.com/f64/ne...6-a-61558.html I believe he has some extras so shoot him a PM.

[andy_con]

um seem strange

should the cans go fully in for good heat sinking and then be bolted in?

[whatsupadrian]

Exactly my suspicious. I am going to go home right now and double check because it never looked right to me from the beginning.

[SrS]

or you should just know basic electronics ~

True, but apparently many new players start building multiple diode setups first skipping all the basics. If this info save’s some diodes then I’m happy

OK so I guess I will just order a different PSU and run the diodes in series.

Like I said, putting diodes in series only works if the pins are isolated. Most reds have their cathode pin (-) connected to the case. So if you mount your diodes in a metal block (the correct way), your pins are no longer isolated. Basically what you end up with is this:


/Edit:
If the diodes are removed from a sled then there could be some glue residue left, maybe this is why it didn't fit.

[whatsupadrian]

OK So I checked out the diode mount can issue. The LOC will not fit inside.

Johan just sent me a PM, this may be helpful to anyone reading this:

When mounting the open cans you have to make the hole where the head of the diode is fitting in slighty bigger. The stacking system is suitable for red and blue diodes. When having the hole suitable for open cans the blue diodes won,t fit any more. Thats why i made them suitable for the smaller blue diodes. You have to drill the hole where the diode head fits in with a 4mm drill.

So the holes need to be drilled and then they will fit.

True, but apparently many new players start building multiple diode setups first skipping all the basics. If this info save’s some diodes then I’m happy



Like I said, putting diodes in series only works if the pins are isolated. Most reds have their cathode pin (-) connected to the case. So if you mount your diodes in a metal block (the correct way), your pins are no longer isolated. Basically what you end up with is this:


/Edit:
If the diodes are removed from a sled then there could be some glue residue left, maybe this is why it didn't fit.

OK, looks like its impossible for me to isolate those case pins in these mounts. So im still stuck on parallel.

[hivelaser]

Let me ask this, which material is not conducting electricity but is transferring heat? Please no super expensive exotic materials...

[swamidog]

use kapton tape.

Let me ask this, which material is not conducting electricity but is transferring heat? Please no super expensive exotic materials...

[hivelaser]

I mean something i can machine but that would work too, so i am able to make a adapter ring or something... I know some ceramics but that's hard to machine...