6,552

24

11

Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

1 Person Made This Project!

Recommendations

  • CNC Contest

    CNC Contest
  • Make it Move

    Make it Move
  • Teacher Contest

    Teacher Contest

11 Discussions

I made my version of this ible

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

hope you like it

0
None
Luigi Pizzolito

6 years ago

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

0
None
mariollop

8 years ago on Introduction

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
0
None
__DELETED__mariollop

Reply 8 years ago on Introduction

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

0
None
__DELETED__mariollop

Reply 8 years ago on Introduction

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 :-)

0
None
ledfreak01__DELETED__

Reply 6 years ago on Introduction

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