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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

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
<p>Whats the point of the NPN? If the LDR is a switch couldn't the NPN be eliminated?</p>
<p>Whats the point of the NPN? If the LDR is a switch couldn't the NPN be eliminated?</p>
<p>Whats the point of the NPN? If the LDR is a switch couldn't the NPN be eliminated?</p>
<p>Already bought the components but they forgot to send the LDR :(. Gonna make one with a switch to test light intensity. </p><p>These will be my kids night light :)</p><p>Thanks</p>

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Bio: My name is Taylor, Im currently going to school for electrical technology, going to school for what I love. I have been in love with ... More »
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