LEDs, LDRs + Thermistors

LEDs, LDRs and Thermistors

LDRs - Light Dependent Resistor

This is the symbol for a LDR

It works in the way that:

When there is a low light intensity there is a high resistance - low current

When there is a high light intensity there is a low resistance - high current

These can be used for automatic lighting - turn on when it gets dark

Used…