Test if diode is working?

[Dutch67]

Hey there I'm not sure if this is the right place to ask but I had a question on a diode I just got. I am making a violet laser using a bdr-209 diode and I kinda dropped in when I took it out of the packaging. It fell maybe four feet and hit the ground. I hoped it wasn't damaged but when I hooked it up to the driver and power supply it wouldn't turn on. I looked inside the can as best as I could and it didn't seem as if anything was broken, but I couldn't see it that well even with a magnifying lens. I remember my grandfather telling me something about using my meter to check ohms of resistance on the diode but I can't remember to well.

Any help you could give me is greatly appreciated

 

[94Z28]

Hey there I'm not sure if this is the right place to ask but I had a question on a diode I just got. I am making a violet laser using a bdr-209 diode and I kinda dropped in when I took it out of the packaging. It fell maybe four feet and hit the ground. I hoped it wasn't damaged but when I hooked it up to the driver and power supply it wouldn't turn on. I looked inside the can as best as I could and it didn't seem as if anything was broken, but I couldn't see it that well even with a magnifying lens. I remember my grandfather telling me something about using my meter to check ohms of resistance on the diode but I can't remember to well.

Any help you could give me is greatly appreciated

Do you have a dummy load to test driver output current? If driver is output correct current, and voltage is correct on input side (batteries are good) then it would probably be toast =(

http://laserpointerforums.com/f51/how-make-selectable-dummy-load-very-depth-64585.html

 

[diachi]

Do you have a dummy load to test driver output current? If driver is output correct current, and voltage is correct on input side (batteries are good) then it would probably be toast =(

http://laserpointerforums.com/f51/how-make-selectable-dummy-load-very-depth-64585.html

Either that or you have the diode connected to the driver incorrectly.

 

[Dutch67]

Do you have a dummy load to test driver output current? If driver is output correct current, and voltage is correct on input side (batteries are good) then it would probably be toast =(

http://laserpointerforums.com/f51/how-make-selectable-dummy-load-very-depth-64585.html

I don't have a test load but I got the driver from DTR so I assume it would be pretty good. I'll look into getting a test load though, because I'll probably need one for future experiments anyways

Either that or you have the diode connected to the driver incorrectly.

I checked the pin-out and it should be good. Blah. :cryyy:

 

[diachi]

I don't have a test load but I got the driver from DTR so I assume it would be pretty good. I'll look into getting a test load though, because I'll probably need one for future experiments anyways




I checked the pin-out and it should be good. Blah. :cryyy:

You can build a dummy load rather easy - bunch of silicon rectifier diodes (0.7V drop/diode, pick however many you need to get close to your LDs voltage drop) and a 1Ω resistor. Need to pick diodes/resistors with the correct ratings for the maximum current you plan on testing of course. You wouldn't test a driver set to 5A using a bunch of 1N4001s...

 

[Dutch67]

You can build a dummy load rather easy - bunch of silicon rectifier diodes (0.7V drop/diode, pick however many you need to get close to your LDs voltage drop) and a 1Ω resistor. Need to pick diodes/resistors with the correct ratings for the maximum current you plan on testing of course. You wouldn't test a driver set to 5A using a bunch of 1N4001s...

Yeah I'll probably have to go get some parts then

 

[Dutch67]

Soooooo I didn't even do anything to it but I decided to give it one last go and I hooked it back up to the power supply... Aaaaaand it worked :thinking:

Whatever happened I'm happy anyways. Thanks for your advice anyways guys

 

[diachi]

Soooooo I didn't even do anything to it but I decided to give it one last go and I hooked it back up to the power supply... Aaaaaand it worked :thinking:

Whatever happened I'm happy anyways. Thanks for your advice anyways guys

Loose connection somewhere maybe? Either way - glad to hear you got it working!

 

[Dutch67]

Loose connection somewhere maybe? Either way - glad to hear you got it working!

Maybe but I don't know. I had it soldered together and the ends that were connected to the driver were hooked up to alligator clips. Oh well whatever it was it went away.

 

[Lifetime17]

hi,
If your going to build you need equipment LPM, PSU , DMM, test load ....... takes the W out of work you can never have enough equipment for this hobby..It pays off buddy

Rich

 

[Dutch67]

hi,
If your going to build you need equipment LPM, PSU , DMM, test load ....... takes the W out of work you can never have enough equipment for this hobby..It pays off buddy

Rich

Yeah. I'd really like to have a lot of this stuff but I'm still kind of young, so my cash income isn't very substantial, yet. I'm moving down to Southern Virginia soon to start schooling/work, so I should be making enough money then to save up and afford some things. I'm gonna aim for an LPM and test load first. Then I'll work on the other stuff.

I have some big plans for my laser collection
Just gotta save up first