Hello,
Recently I bought this laser kit on Ebay:
300mW+ 650nm Red High Power burn Laser Diode Module Kit - eBay (item 280393602910 end time Sep-11-09 21:27:47 PDT)
It came well shipped, all parts were in the package.
Now I have soldered everything on the circuit-board, and now I am trying to find an adaptor which I can use for testing.
However, I don't want to kill the diode, so I wanted to ask for some advice...
I don't know much about resistors and currents.
On the example page which includes the schematic, it shows an example current of 417mA with 3ohm resistance (adjustable @ pot).
I = 1.25 / R
I = current, R = resistance
I can use 6 to 20 Volts.
My questions:
1. How much difference does it make when I use 6 or 20 Volts?
2. In what kind of way will this have influence on the input mA + ohm's?
3. Can I use a 12V - 350mA adaptor? I guess I then have to set the pot to 3.57 ohm. [ 1.25 / 0.350 = 3.57 ].
Please help me out, I am not realy into currents and Voltages etc.
Just for extra information, the title on the schematic shows:
"Max 463mA Constant Current LD Driver Kit
Input Voltage 6 - 20V"
Thank you.
Recently I bought this laser kit on Ebay:
300mW+ 650nm Red High Power burn Laser Diode Module Kit - eBay (item 280393602910 end time Sep-11-09 21:27:47 PDT)
It came well shipped, all parts were in the package.
Now I have soldered everything on the circuit-board, and now I am trying to find an adaptor which I can use for testing.
However, I don't want to kill the diode, so I wanted to ask for some advice...
I don't know much about resistors and currents.
On the example page which includes the schematic, it shows an example current of 417mA with 3ohm resistance (adjustable @ pot).
I = 1.25 / R
I = current, R = resistance
I can use 6 to 20 Volts.
My questions:
1. How much difference does it make when I use 6 or 20 Volts?
2. In what kind of way will this have influence on the input mA + ohm's?
3. Can I use a 12V - 350mA adaptor? I guess I then have to set the pot to 3.57 ohm. [ 1.25 / 0.350 = 3.57 ].
Please help me out, I am not realy into currents and Voltages etc.
Just for extra information, the title on the schematic shows:
"Max 463mA Constant Current LD Driver Kit
Input Voltage 6 - 20V"
Thank you.