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I made my version of this ible

https://www.instructables.com/id/Dark-Activated-Night-Light/

hope you like it

Made one!

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Why do you need a resistor for the led if you're using 3v?

does it matter if its a pnp or a snp transistor?, i did the hook up w/ supply voltage 2 aa batt. 1.5 each and does the size of the eldr matter?

5 replies

I haven't heard of an snp transistor....

As far as I know the size doesn't matter, but the one I used was about 4x5mm

thanks for the response , i meant npn .

I don't honestly know the difference between the two.

Sorry for being useless >.<
I'm just a beginner in electronics really...

Thanks for checking out my 'ible though :-)

an npn transistor means it needs a positive volt to turn on and a pnp transistor needs a negative volt

and in this aplication i beleive you need a npn transistor

I don't see why not... You would need to use a battery strong enough