Motion Activated Water Sprayer (for pets)

thingiverse

This is a motion activated water spray bottle that I made to stop my cat from jumping on the counter when I am not around. In action https://youtu.be/q4RpbWnQK8s I originally made this without the voltage booster but found the motor to be a little lacking as the PIR sensor is only pushing a 3 volt signal to the motor driver instead of the max of 5 volts. To fix this I added the voltage booster and set it to 6 volts and just have it free floating with some heat shrink around it (not shown in the pictures). An Arduino could also be added for some extra customization in the timings, but I was happy with how it turned out without it. I also added a backplate with a cutout for installing a switch. This is optional but if you want to add it, the best place is probably in between the motor and voltage booster. The anti-rotation cap gets super glued to the top of the spray bottle. This is to stop the sprayer from rotating and spraying inside the frame. BOM: Motor driver, L9110S www.amazon.com/HiLetgo-H-bridge-Stepper-Controller-Arduino/dp/B00M0F243E V step up, MT3608 www.amazon.com/MT3608-DC-DC-Module-Booster-Arduino/dp/B07T7ZCTNK Micro USB to DIP 5-Pin Pinboard www.amazon.com/gp/product/B07KS1RPMP TT Motor www.amazon.com/gp/product/B07XX3KCG4/ PIR Sensor, HC-SR501 www.amazon.com/gp/product/B07KBWVJMP/ Spray Bottle www.amazon.com/gp/product/B085PRT2MP/ M3x8 5pcs M2x6 8pcs (optional) Switch, 10x15mm spst www.amazon.com/mxuteuk-Household-Appliances-Warranty-MXU1-1-101/dp/B07QS9L2S1/ I chose amazon because I don't like long shipment times, but a lot of the electronics can be found on aliexpress.com for a lot cheaper