bolle91
Newbie level 4
Hi,
I'm studying engineering: applied physics..
In our project, we need to make a device that detects a concentration of black soot in the air..
To do that, we need to have a laser diode that shoots a particle, which will then send out sound waves if the laser has the right frequency.
Anyway, we need to start with the signal of a sound card (computer) and from there we need to make the electronics to make the laser diode work.
We know we need to add a current with a circuit with opamps and transistors and it should remain a sine-function.. Any help?? Thx.
I already found this:
http://www.bcae1.com/opamp.htm (opamp as a regulator) Could that be the right answer?
I'm studying engineering: applied physics..
In our project, we need to make a device that detects a concentration of black soot in the air..
To do that, we need to have a laser diode that shoots a particle, which will then send out sound waves if the laser has the right frequency.
Anyway, we need to start with the signal of a sound card (computer) and from there we need to make the electronics to make the laser diode work.
We know we need to add a current with a circuit with opamps and transistors and it should remain a sine-function.. Any help?? Thx.
I already found this:
http://www.bcae1.com/opamp.htm (opamp as a regulator) Could that be the right answer?