Understanding Photo-Resistors or Light Dependent Resistors: LDR 101

LDRs are ideal for many light sensing applications. They are low cost but effective, providing a huge change in resistance.

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#lightdependentresistor #photoresistor #LDR

A thallium atom holding a photoresistor

Thallium emits green light when burned. Its salts are highly toxic and thus were historically used as rat poison. Since the discovery of thallium’s other properties, it’s now used more in optics and electronics.
#periodictable #elements #thallium #photoresistor #chemistry #education #art