GearHeads Forum

Joakim wrote: Art:

I don't know that much about laser power supplies, but I was of the impression that the potentiometer just gave a DC input between 0 and 5V to set a current limit for the tube. That input react very slowly and I read that it is recommended to use a 20kHz for that DAC.
If I measure the input voltage, it must be below 3.5 to limit current to max 17mA and give the tube long life.

Need to read some more on laser power supplies and how they work...
Joakim

Hello .
I has a lot of problem with my power source . My input impedance was very low almost 1kR and the creator decide to let some residual input voltage as 1.2V , and that made my work very difficult .
I solved finaly , i eliminate almost entire chinese cheap control and now is how should be .In that time i made a lot of researches about , and finaly i open and modify myself .
What i found close with what i saw inside of my source was this schematic found on some russian forum .
If help someone ...
http://mir-cnc.ru/topic/5872-назначение-подстрочников-на-блоке-питания-dy10-к-т/
Thanks
Bobby

Bobby:

Thx, the more information we have the better.

Art