Hello, im pretty new at electronics and got couple of questions. I have read many times different guides how to build laser driver. But theres still something i dont get it. So
1) Why do i need 5 ohm resistor?
2) Why do i need capacitor? (its necessary for giving consant power?)
3) I know i dont have to use potentiometer but if i wanna do it then as i read i have to use 100 ohm one but if i would use 1000 ohm it would be too big resistance? How to calculate to understund it?
Btw i still thinking of building 1w laser what needs approximatly 1-1,2 volts. So i need to use lm317 and it gives out 1,25 volts and if i need to calculate resitance then i just need to 1,25/1= it gives 1,25 ohms. why 5 ohms? I just cant get it.
Thanks.
1) Why do i need 5 ohm resistor?
2) Why do i need capacitor? (its necessary for giving consant power?)
3) I know i dont have to use potentiometer but if i wanna do it then as i read i have to use 100 ohm one but if i would use 1000 ohm it would be too big resistance? How to calculate to understund it?
Btw i still thinking of building 1w laser what needs approximatly 1-1,2 volts. So i need to use lm317 and it gives out 1,25 volts and if i need to calculate resitance then i just need to 1,25/1= it gives 1,25 ohms. why 5 ohms? I just cant get it.
Thanks.