KEM - 400AAA Build WIP

Hey LPF. In some help topics I requested some help for building a DDL circuit to power the weak KEM - 400AAA laser diode. I built a DDL circuit without the capacitor for testing reasons, using a 150 ohm resistor between ADJ and OUT pins. I should be using a 30 - 50 Ohm resistor so I can get about 40mA running to the diode, but I only had 150 ohms on hand. So i figured it won't hurt the diode, so I ran it and it worked, while it was a very low power light, it worked. I know that it wasn't an "about to die" low power light, because I was able to see it on my wall about 4 ft away.

I will get beam shots when I get the right resistors. Until then, Goodbye.

Okay, well, I tested the laser out without a proper "housing" for testing purposes, but it's almost ready, I can get it focused to a small dot, but being as low powered as it is, makes it hard to see with the lights on. I don't think I will be getting beam shots without a means of a fog machine. But I guess I can show the dot on the wall, and the florescence on a bed pillow.

Enjoy.


Lighted Room Blue Dot


Dark Room Blue Dot


Dark Room Normal Dot

P.S. I do not own a fog machine.

Very good.

Next, get a PHR sled, only a few $ and i'tll give you around 100mW.