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You have some great points. I am looking for a wavelength well within the visible spectrum (IR light freaks me out especially high powered IR haha) So I guess that would be the only other specification. Anything higher than 350 mW would be practical for the LM317 driver I am using. I may order a...

Hello all! My name is Adam I an an Electrical Engineering Student living in New York! I have always been fond of lasers but have never had the free time/money to pick them up as a hobby...until now that is haha. Cheers Adam

Hello all, I am in the process of building my first burning laser around an LPC836 350mW 500mW laser diode. (Exciting right) within the first day of having the 2 diodes that I had waited 1 month for, they were both fried :))))) I have ordered a replacement but it is not set to come in until mid...

Thanks Paul I appreciate the help. I just ordered another lpc836 but it isn’t coming in till mid August :/ do you know of any good laser diode distributors? I am in New York, the diodes do not have to be lpc836 but I am not super familiar with lasers yet and don’t wanna stray super far along the...

Annnnnnnd I just realized I’ve been using the vout pin as “current out.” Re measuring with the 3.3 ohm resistor across the adjust and vout across the 3 diode 1 1.6 ohm resistor yields 520 mV. Now all I have to do is order more diodes -_- (and increase resistance). I knew something wasn’t right.

After making the 3 diode 1 resistor setup and measuring my output across my resistor I found a voltage of 1.4 volts...and rising.... I am no dummy when it comes to electronics as I am an electrical engineering student. None of my leads are shorted and everything has a proper solder connection...

I used an ESD bracelet when mounting the diode. It is also sitting in an Axiz module. the LM317 is heatsynced but the module is not

By Silicon Rectifiers do you mean SCRs? or a silicon diode

The diode is set in an axiz module. This is what I touched to see if it was warm. When mounting the diode and working on the driver I was connected to an esd bracelet properly grounded so I don’t think that is the issue.

Paul, In my previous set up I did have the lm317 heat synced, but with a smaller heat sync. I will tryna larger heat sync on both the module and the lm317. I’m thinking there may be something wrong with the power supply but I will run it with the test load you recommended to see what the output...

Also, I have the lm317 heat synced as well. I have an old cpu heatsink on standby but do not feel like drilling the cavity at the moment. Could this be my only issue?

Hi Paul, I have it seated in an Axiz module which I bought frcan m eBay. I pulled the driver as well as the other diode out and reseated the lpc836 where the diode was. I am using a 6 volt power supply as well. I will be sure to stop in the welcome forum and introduce myself a little, thanks!

Hello all, I am in the process of building a laser around the Mitsubishi LPC836 650nm Red Laser TO18 5.6mm LD Diode 350mw 500mW CW. I am powering it with an LM317 and a wall wart which outputs 12 VDC at a max 2.0A. According to various videos online I saw you could make a current limiter around...