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Light Dependant Resisors help?

Hello,

BBC bitesize says that LDRs resistance decreases as the light intensity increases, yet surely when it gets dark the resistance decreases to allow more current for lights that turn on when it gets dark.
Bitesize is right. What you're talking about are lampposts for example? What happens is that the lights in a street lamp aren't connected directly to the LDR and then power supply, but rather there is some electronics which will mean that the higher resistance of the LDR, the more current will go to the bulb.

If you're interested, here's a video explaining it:
https://www.youtube.com/watch?v=GU1F-EgXFAQ
Original post by BobBobson
Bitesize is right. What you're talking about are lampposts for example? What happens is that the lights in a street lamp aren't connected directly to the LDR and then power supply, but rather there is some electronics which will mean that the higher resistance of the LDR, the more current will go to the bulb.

If you're interested, here's a video explaining it:
https://www.youtube.com/watch?v=GU1F-EgXFAQ

thank you so much for the reply. it's really useful. also, i remember bobbobson helping me out before on something so thanks so much!

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