Hand Sanitizer Dispenser

thingiverse

Hand Sanitizer (or soap) dispenser uses peristaltic pump to dispense fluid when Adafruit VCNL Optical Proximity Sensor observes hand under dispensing tube. Code runs on an Adafruit ItsyBitsy 32u4 5v version (which may be powered by 12v Vbat) and is coded in Arduino IDE. This is all packaged in a 3d printed container, and uses a standard Jelly Jar to hold the fluid. Video of dispenser in action: https://youtu.be/iYxsz3DUehM Photo Album: https://photos.app.goo.gl/EdRW3g8P56AdBAn6A Github with source code and hardware build info: https://github.com/dnkorte/sanitizer The device is setup such that when you initially put a hand into the dispense window it starts pumping at a high rate, then after a couple cycles it slows down for the balance of the hand-in-window period. This helps to initially prime the pump/hose if its been sitting for a while, but doesn't over-deliver once its gotten started. When the hand is removed it reverses the motor and sucks back some fluid to reduce drippage. The device plays a series of beeps through the included speaker while it is dispensing.