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Picture of Quick and simple LED mason jar
Mason jars and leds are almost made for eachother. They are eye appealing and just plain fun. I am going to show you how to make a very simple one that involves a few cheap componets you can find anywhere online! This could be considered an introductory project for those new to electronics but why set limits? You like it you make it :)  lets get started and embark on the simplicity!

This LED mason jar turns on by itself at night. 



Step 1: Things needed

Picture of things needed
You are going to need;

One mason jar
One 5mm led (color of your choice)
One 3volt button battery
One LDR
One 82k resistor
One 2n3904 switching transistor
Some wire
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TOOLS

Soldering iron
Hot glue gun
Helping hands 
Wire strippers/cutters
Pliers
 
Inst11448 months ago

Whats the point of the NPN? If the LDR is a switch couldn't the NPN be eliminated?

Inst11448 months ago

Whats the point of the NPN? If the LDR is a switch couldn't the NPN be eliminated?

Inst11448 months ago

Whats the point of the NPN? If the LDR is a switch couldn't the NPN be eliminated?

lpinho1 year ago

Already bought the components but they forgot to send the LDR :(. Gonna make one with a switch to test light intensity.

These will be my kids night light :)

Thanks