Ok
Just another point on this.
Attached is the Final Stage of the Laser Powersupply (For the Green Laser Diode)
I replaced a lot of the resistors in this section, but I did not have any 0,5ohm resistors on hand.
For some reason they have 2 off 0,5 ohms in Parallel, which is in series with another 2 off 0,5 ohms in parallel.
So basically between the 0v and the Emitter of the NPN transistor, you have a resistance of 0,5 ohms,
but why would they have used the parallel/series combination. Is it in parallel for the Current expected?
I did a test using a 1 ohm resistor (instead of the whole 0,5 ohm section), but the laser output was very dim.
I bridged out this section, and the laser was bright (did a quick test only)..
Does it need to have the 0,5 ohms in the base, what is it for?. If so, then I will need to get some 0,5 ohm 1/4 watt resistors??
I definately do not want to overdrive the Laser diode, so I would rather be safe...
Thanks
P