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04-06-2012, 01:30 AM #1
 Junior Member Join Date: Aug 2010 Posts: 11 Rep Power: 0
facsi
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Can anyone tell if this calculations are correct?

LASER Circuit
Resistor Calc

Vt = 5,0 V
Vb = 5,0 V
Vg = 3,0 V
Vr = 3,2 V

It = 240 mA
Ib = 30 mA
Ig = 180 mA
Ir = 30 mA

Rb = 0,00 ohm 0
Rg = 11,11 ohm 11,66666667
Rr = 60,00 ohm 63

I want to make a circuit to deliver voltages to my lasers. Are these resistors value correct? Main Power supply is 5V

Last edited by facsi; 04-06-2012 at 02:08 AM.

04-06-2012, 02:06 AM #2
 Class 1M Laser Join Date: Aug 2011 Posts: 129 Rep Power: 26
Class 1M Laser

Join Date: Aug 2011
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Rep Power: 26
Re: Can anyone tell if this calculations are correct?

Im not exactly sure what u want to do, but to get rid of 2 Volts at 180mA and 1,8V at 30mA I got the same values.

I hope you are going to power your drivers, and not your laser diodes though...
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04-06-2012, 02:23 AM #3
 Junior Member Join Date: Aug 2010 Posts: 11 Rep Power: 0
facsi
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Re: Can anyone tell if this calculations are correct?

Thanks. Im connecting to drivers ^^

Last edited by facsi; 04-06-2012 at 02:29 AM.

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