Introduction: Dark Activated Night Light

Picture of Dark Activated Night Light

A dark activated night light.

Please also see this one by H4ZZ498
It's the same thing, he made it first thogh.

Step 1: Materials

Picture of Materials

Breadboard (You could make a PCB if you want)
Any NPN transistor
10k resistor ( Or trimpot for variable sensivity)
A LED ( You choose the color)
2X AA battery pack or any 3v battery

Step 2: Build the Circuit

Picture of Build the Circuit

Build the circuit on the breadboard!

Step 3: Done!

Picture of Done!

Done! Now turn off the lights and it should light up.

Step 4: Stripboard Version

Picture of Stripboard Version


kmargie25 (author)2014-08-18

I love it! Totally gonna make it! Where did you get the such a small breadboard?!

Ploopy (author)kmargie252014-08-22

I live in China and I got the mini breadboards from taobao a Chinese service. You will can find these at RadioShack or at EBay. Thanks, please follow me if you liked it.

Ploopy (author)Ploopy2015-07-22

Here it is on Ebay for $3.44 each

ynze (author)2013-07-17

Hey Ploopy, nice project! It would be cool if you gave member H4ZZ498 some credit in your text, since you rebuild his project:

It's good practice to refer to other I'bles you used...

Ploopy (author)ynze2013-07-17

I just changed it and pu a link to his ible at the top ↑

ynze (author)Ploopy2013-07-18

Cool! Now it's what Instructables is all about: Learn, make share :-)

JaiS5 made it! (author)2015-10-17

made it 2 times didnt work did it exatcly to specs

Ploopy (author)JaiS52015-10-17


does it work now?

if it doesn't maybe you have a PNP Transistor, or had abad connection.

If you have any problems tell me and i will do my best to help u.

About This Instructable




Bio: I like eletronics, AVR's and 555timers. Mini Pumpkins! I also love jerky & ☕️.
More by Ploopy:Neon Stick (USB Neon Inverter) [And Flash Drive...]LED Tester (20ma Constant Current Source)Cool Spinning Top from Old Motor
Add instructable to: