January 21, 2011

Twinkle, Twinkle, Little Soap Dispenser

Here are the parts you will need.

  • LYSOL® Healthy Touch® No-Touch Hand Soap System
  • Aruino Uno
  • NPN transistor
  • 3x 330 Ohm resistors
  • 2x 1k-10k Ohm resistors
  • 2 7-segment displays
  • 24-gauge solid core wire
  • perfboard

 Disassemble the soap dispenser. There are three screws on the bottom and four screws in the battery compartment. Once you take them out, you should be able to take off the bottom and access the circuit board

Cut off all the wires from the board. Solder some solid core wires to the IR receiver.

Cut the traces for the IR receiver on the back

Now, lets take a look at the schematics.

Go to Step 2