I just build a constant current source to drive an high power led, according to the attached scematic. When i tried to test the circuit with a 5v power supply, the led got very hot, but emitted no light at all. So i double checked everything and had to realise that the wires on my power supply were labeled wrong. Therefore i applied a reverse voltage to my circuit, that killed my led.
My question is if it’s still safe to use the parts of the current source or if it’s possible that i damaged them as well. The MOSFET didn’t get hot, but i just want to be sure before destroying other led’s.
For the npn i used a 2N5088BU and the MOSFET was a FQP50N06, I think they survived the reversed voltage treatment, but i am not very familiar with Transistors so id rather ask here just to be sure.
Thank you in advance for your awnsers