Basically a USB Worm Light but without the worm part.
In the following instructable I will show you how to make a slightly more simplified version of a USB Wormlight
But I just want to warn you I will be using mostly images done in MS paint, my camera can't focus on close up objects.
Also, I would like you to know that this instructable was extremely rushed, I had very little time to do it in, and was unable to increase its quality. In my next instructable, I will put much more effort in, and I am sorry if you have trouble understanding it.
Thank you for reading my first instructable..
Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.
Step 1: Getting the Parts...
Okay, to make this you are going to need a few different bits and pieces:
First off, you'll need to have a High intensity LED, preferably white. Also you have to know its specifications (like current and voltage draw).
Next you will have to find the correct resistor. Now most of you will already know ohms law, but to simplify it:
Voltage Source - Voltage drop of LED / Current Draw of Led
Example: 5v-3.6v(=1.4v)/ (lets say 75ma which =) 0.075= 18.6 so an 18 ohm resistor.
Another thing you'll need is a USB plug, this is just a USB plug that has nothing connected to it. See picture below.
Finally you will need some sort of epoxy resin. This is just to seal the components and ensure they dont short or get damaged.
You will also need some basic tools like pliers, side cutters a soldering iron etc.
Step 2: Putting It Together.
Now what you must do is put it all together.
First clip off some of the excess on leads on the LED, leaving about 1.25 cm on the longer and 0.5cm on the shorter leads, then bend the anode, as shown in one of the images below, and rest it so that the LED's head is on the little curved tab where the cable would normally be, and with the lead lying in the groove of the positive output of the USB plug (1). You can tell which one you have placed it in by looking at one of the images below.
Solder it in place.
Next, trim both of the resistor's leads to around 0.5cm. Solder one end to the groove connected to #4, and the other end to the remaning lead on LED.
Step 3: Finishing It Off and Testing....
What you must do is first off make sure that none of the leads are touching. Then mix up some epoxy and slowly apply it over all the contacts and components. After everything is well coated, leave the epoxy to set. This will take about an hour( Well actualy about 7 minutes, but it reaches its hardest point after 60).
Once that's over, all you have to do is plug it into a USB port and watch it light up.
There you go, it's done.
You can connect it to an extension cable and it will work like a worm light
Alternatively, you could plug it into a portable USB charger; of which there are many instructables, and use it like a small torch.
But if it doesn't work, remove it immediately because there might be a short circuit which will damage your USB port, not just the device.