

Available


LIGHT DEPENDENT RESISTOR (LDR)
TK.7.00
- Available: 9
- Model: LDR
Photo resistors, also known as light dependent resistors
(LDR), are light sensitive devices most often used to indicate the presence or
absence of light, or to measure the light intensity. In the dark, their
resistance is very high, sometimes up to 1MΩ, but when the LDR sensor is
exposed to light, the resistance drops dramatically, even down to a few ohms,
depending on the light intensity. LDRs have a sensitivity that varies with the
wavelength of the light applied and are nonlinear devices. They are used in
many applications but are sometimes made obsolete by other devices such as
photodiodes and phototransistors. Some countries have banned LDRs made of lead
or cadmium over environmental safety concerns.
Tags:
B023