Today I tried to figure out which of my components have been fried by my dc booster accident. Luckily, its just the photodiode (OPT101) that i use to test turbidity. I didn’t believe that it was broken even though it outputted strait 0v with light and without light, since it apparenlty can handle up to 36v. But after lots of testing i think it is indeed broken. I soldered on a new one, but i soldered the pin headers teh wrong way around (this is like the 1 billionth time i did this wrong) so I tried to take the headers off. But i didn’t have any solder wick or anything, so i tried to pull the headers off (which is very very stupid), and i did pull the headers off… along with a big chunk of the PCB. So yeah, no more photodiodes. But fortunately I do have some LDRs and ill use tehm, hope its accurate enough.