Clickey
0
- Joined
- Mar 15, 2009
- Messages
- 74
- Points
- 8
So I am pretty clear on the laser diode situation but now I need a better testing method for my circuit. Unfortunately I do not have a mA reading on my multimeter, well I do, but it just doesn't work. (I think I broke it)
Now, in one of my previous posts I heard someone say "1.25 Vref" or something similar.
Also in this video by Styropyro he says to take 1.25 and divide by your requested output in amps. I don't know why 1.25 is used, but I do know how to calculate the requested output current. The question that remains is if I can test if my LM317 still works without a mA reader.
So this is the future circuit I intend to build I want you guys to tell me if it's all good.
To calculate RValue you need to do this
1.25 / desired Current = RValue
In my case for my future PHR - 803T diode it will be 125mA so
1.25 / 0.120 = 10 so my value for the resistor is going to be 10 -ohms.
I also have a few questions about another diode. The KES400A is the blu-ray diode found inside of a PS3. My friend is gonna give me his broken PS3 and I am going to take the laser out. I really don't have a need for the console as I am getting a XBOX.
So what should I run the KES400A at?
Now, in one of my previous posts I heard someone say "1.25 Vref" or something similar.
Also in this video by Styropyro he says to take 1.25 and divide by your requested output in amps. I don't know why 1.25 is used, but I do know how to calculate the requested output current. The question that remains is if I can test if my LM317 still works without a mA reader.
So this is the future circuit I intend to build I want you guys to tell me if it's all good.
To calculate RValue you need to do this
1.25 / desired Current = RValue
In my case for my future PHR - 803T diode it will be 125mA so
1.25 / 0.120 = 10 so my value for the resistor is going to be 10 -ohms.
I also have a few questions about another diode. The KES400A is the blu-ray diode found inside of a PS3. My friend is gonna give me his broken PS3 and I am going to take the laser out. I really don't have a need for the console as I am getting a XBOX.
So what should I run the KES400A at?
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