Easy Transistor Tutorial with CdS Cell

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[@arletpaz8010]

GREAT JOB ON ALL YOUR PROJECTS, thanks for the share!
Question:
why power this circuit ? i thought the photocell works by light, therefor the circuit wouldn't need light to activate the transistors BASE and at that point the "light switch will be on" (current flows from C to E thanks to cds turning switch in B) or is the power meant more for the LED? i understand the cds is not going to produce enough of anything to power the LED mA's and V required to do so?

[@arletpaz8010]

@@trw8777 ahhhhh, thanks for that i did forget to remember the whole resistor aspect of the photocell

[@billywhizz98]

Do you have a link for the cds cell because it doesn’t come up on eBay

[@diorama111]

Try searching for "cds resistor" on ebay.