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Thanks for the responses guys. Unfortunately I didn't get the driver working for whatever reason. I then got impatient and wanted to find out if the LD was even working so I found a 3.4vdc wire on the PSU and hooked it up to the diode. It's only producing a very small amount of red light. Surely...

I've tried to hook up a LD to a small DC wire from a PSU that generates only 3.4 volts. I assume it's relatively safe since it's a low voltage. When I plug it in and hit the switch though, it glows but not near as bright as it should. Surely I couldn't have LED'd my LD from that little power...

Ok , so in my case It is a shut off if the power exceeds 5v or so, protecting the driver or more importantly, the diode. However, what about the heat issue-- powering a red with nearly 350ma? Should I simply turn the adjustment down on the driver or use some sort of resistance just after the PSU?

Hi everyone, I'm very wet behind the ears here. Working on my first laser build now. Red diode powered by 5v input from old PSU. I purchased an AixiZ driver and come to realize that some were having issues with the driver. Firstly, what is transistor-transistor logic and how do you use it? I...