Recent content by sammo

Can you see where the leads are melted/not connected? Believe it or not, it was the same with my soldering, the leads are 1/100 of the solder tip diameter. The trick is to not touch the thin leads with your soldering tip, you just dip them for a moment into melted soldering material on the side...

Yes, that is true :) First I have to draw the schematic :P then I'll post it ;) Currently I'm designing the PCB for the laser driver with led bar battery status, laser diode temperature led bar dispay, fan on/off control, and laser shutdown in case of low battery or high diode temperature :)

I agree that I was lucky not to blow the laser chip. Really interesting would be to know if the damage to the diodes that failed at higher continious currents was the damage to the laser chip or to the wiring. Has anyone opened a such dead 445nm diode?

I opened it with an OLFA cutter. I carefully cut the can all the way around, using not quite fast moves and applying little force, but at first didn't actually cut through it, just to make the material thinner for further cutting. Then I started to cut through at the part where the block (that...

Sorry :p BTW...that red sphere on the photo is a ruby crystal (and it's put on a sapphire ring :) ). It fluoresces really beautifully, especially because of so much contrast between blue and deep red.

Thanks for your replies. I don't think the temperature can increase so high to melt the solder, thermal conductivity of those small wires is very small, would probably fry the laser chip long before melting solder. Diode also has now the advantage of better cooling because it's open type :) I'm...

And some laser action!

Here are the photos of the opened laser diode: First two pictures present the diode in burned state, the next three the solder fix and the last two emission at 5mA and at 30mA

Hi! This is my first post here :) I didn't check all the forums if anyone ever did this, but I thought you will be interested in what I did :) A got my 445nm diode about six months ago but didn't find time to build a laser an it took quiet a while to get all the necessary stuff (bought an...