Instructables

How-To: Make an RGB combination door lock

Picture of How-To: Make an RGB combination door lock
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Putting a custom designed electronic lock on your space seems like a geek right of passage. For our latest workspace, we decided to skip the boring numbered keypad and build a custom RGB backlit keypad powered by an Arduino. Instead of typing in numbers, your password is a unique set of colors. In today’s How-To, we’ll show you how to build your own and give you the code to make it all work.  The basic design for the RGB keypad came from [JMG]‘s Arduino based Monome clone. He used an Arduino, and multiplexed RGB LEDs with some digital potentiometers to create a color mixing keypad. Since we couldn’t fit the complete 4×4 keypad into a standard 2 gang wall box, we chopped the design down to a 2×4 matrix. This cuts down significantly on the cost to build the keypad and makes the code that much easier to digest.
 
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Step 1: Materials needed

Picture of materials needed
To build your own RGB keypad, you’ll need the following:
• An electric door strike (Smarthome.com)
• A locking door handle (Any hardware store)
• An Arduino or compatible clone (Sparkfun, adafruit and others)
• 1 TIP120 transistor
• 1 1N4001 diode
• 10 1N4148 diodes
• 4 2n2222 transistors
• 1 Monome style keypad (Sparkfun Electronics)
• 1 Keypad PC board (Sparkfun Electronics)
• 8 RGB LEDs (Sparkfun Electronics)
• 1 7805 voltage regulator
• 4 100 ohm resistors
• 2 150 ohm resistors
• 8 1 kohm resistors
Liamthe1st3 months ago
I just joined up with a pro account hoping to be able to print some PDF 's. This is one of the most interesting that I have seen but no printable version. Yet I should like to make it only not from my I phone screen.
hey, this is a cool project, you should change your first intro image to your finished product :)

-audrey
kartikaa23 (author)  audreyobscura4 months ago

This image shows its working so i thght this wld b a better image

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edlc3131 year ago
Im going to try until i fail
LostRite1 year ago
Very cool! Will be making in the near future!
MrE1 year ago
VIDEO!!!!!! Please post a video of this working please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please pretty please with bubble gum and cheese! I love this idea but want t see the pretty lights open da door and do all da little flashy thingsy. And can you do the light sequence too?
srodan1 year ago
this looks like the perfect balance of complicated but rewarding. I will try this
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