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resistor

Carbon Film Resistors Vs Metal Film Resistors
Carbon Film Resistors Vs Metal Oxide Film Resistors

Carbon Film Vs Metal Film Resistors

Invented in the year 1959 by Boykin, Resistors are widely used in almost all electronic circuits today.
LDR Resistor
LDR Resistor

LDR

LDR Pin Description The Light Dependent Resistor (LDR) is just another special type of Resistor and hence has no polarity. Meaning they can be connected in any direction. They are breadboard friendly and can be easily used on a perf board also.
Resistor
Resistor

Resistor

Pin Configuration Resistors have two leads, there is no polarity for a resistor and hence can be connected in both directions.