Hi. i am working with BPW21R photodiode. I am controlling the output using LED as an illuminating source and controlling it by pulse width modulation. I need to amplify the current upto 1.5 amperes - 2 amperes. I have 2N3055 power transistors and have used them in darlington pair configuration...
I wish to drive a 1W IR laser and use it as a heating element. Please guide on how should i go about it. How do i construct a drive circuit and control it.