Laser Pointer Forums - Discuss Laser Pointers | High Power Lasers

I was told to use 4 diode in series and a resistor.

(Looking at rkcstr's test load, I see his load use 3 diodes and 1 resistor, and 1 resistor for discharge.)

So that lead leads me to wonder which diode (not laser) to use, and should I use 3 or 4 diodes? Resistor I'll use a 1 Ohm to keep it easy..

Thanks