Hey
So I was organizing some components I had lying around, and I found this black square type component. It has two long leads and at the tip, is a square black thing.
I thought maybe it had something to do with temperature or light because the other components around it where heat/light sensors. So i measured its resistance and it was about 4.14Megaohms. I used a lighter (thinking it was a temperature sensor) and the resistance shot up to like 16Mega. It reacts to light more than temperature. I moved the flame a good distance away, enough to not feel the heat, and it still shot up.
It seems like its an LDR, but instead of resistance having an inverse relation to light, it seems to be proportional. When I completely covered it up with my hand, it dropped to about 500K.
Do they make LDR that increase resistance ? Is it meant to detect IR light, since its coated in some, what appears to be glossy plastic casing ?
Anyways, I threw it in with my other LDRs until a better explanation could be found.
So I was organizing some components I had lying around, and I found this black square type component. It has two long leads and at the tip, is a square black thing.
I thought maybe it had something to do with temperature or light because the other components around it where heat/light sensors. So i measured its resistance and it was about 4.14Megaohms. I used a lighter (thinking it was a temperature sensor) and the resistance shot up to like 16Mega. It reacts to light more than temperature. I moved the flame a good distance away, enough to not feel the heat, and it still shot up.
It seems like its an LDR, but instead of resistance having an inverse relation to light, it seems to be proportional. When I completely covered it up with my hand, it dropped to about 500K.
Do they make LDR that increase resistance ? Is it meant to detect IR light, since its coated in some, what appears to be glossy plastic casing ?
Anyways, I threw it in with my other LDRs until a better explanation could be found.