A Light Dependent Resistor (wiki) or photo-resistor is a resistor of which the resistance depends on the amount of light received. More light means less electrical resistance for an LDR. LDR`s are sensible to a wide range of light wavelengths including laser. For Arduino we have 3 tastes of the same sensor. They all 3 need an analogue pin:
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| KYcode  | KY-018 | | Prijs indicatie   | €  0,05 | | Sketch voorbeeld   | Arduino Uno R3 | | Pinout tekst   | Pinout | | Menu groep   | Sensors | | Laatste verandering   | 2024-11-29 |
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|  Afb 1: Lichtgevoelige weerstand Afb 2: LDR met spanningsdeler
 Afb 3: Lichtsensor module
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