Instructables

Programmable LED Umbrella

FeaturedContest Winner

Step 5: Power Supply & Arduino

The arduino requires a 5V regulated power supply.  Using a trick I learned right here on Instructables, I cracked open an old car-cigarette lighter type phone charger & pulled out the circuit board. I hooked it up to my 11.1V battery on the cigarette lighter side and the arduino on the phone side. Be sure to test the voltage output from the charger with a multimeter to make sure you're really getting about 5V, significantly more could fry your arduino.  I added a tiny Lilypad slide switch between the power supply and the battery to allow me to turn the umbrella on & off. 

I sewed a holster for the battery using old nylon strap.  Velcro allows me to open and close the holster to replace the battery.    I then zip-tied the holster to inside top of the umbrella around a rib and the main tube.

Finally, sewed the arduino and the power supply to the umbrella and hooked up all the wires. 
 
Remove these adsRemove these ads by Signing Up
Pro

Get More Out of Instructables

Already have an Account?

close

PDF Downloads
As a Pro member, you will gain access to download any Instructable in the PDF format. You also have the ability to customize your PDF download.

Upgrade to Pro today!