Arduino PIR motion water gun

first what youll notice my grammer isnt the best 🙂
ok what youll need: 1 transister/mosfet that can handle the current for the water gun motor, this is the one i used –

arduino PIR motion water gun   –   then a diode, i used this one  –   – then a 10k ohm resistor, then a PIR, i didnt use this one but it should work –   –  then a bread board, i used this one   –  –  then some jumpers these are what i used   –   –   then an arduino, i used a uno   –     and a water gun, which was for me, a pretty hard thing to find around the house, but i got one from a pesticede battery operated sprayer (it had never been used). and i made the sprayer tip using some tubing, a .22 air gun pellet and a tack ( im pretty creative:). last a battery  and battery holder that will work for your sprayer motor.  oh and also keep in mind this instructable was done by me, a 14 year old who just got into elctonics in the last few months, plus this is my first instructable :).

Step 1: The code

first, upload the code. go to the bottom of this page – – copy and then paste it in the arduino ide, then change the LED pin to digital pin 3, then save the code in the ide, then upload the code to your arduino.

Step 2: Wiring up the PIR

follow this wiring diagram for the PIR. yellow jumper is out or signal, black is ground, and red is positive

Step 3: The circuit

now build this circuit on a bread board, but know that you wont get it to work the first time. and its very picky on how you put the jumpers, especially around the mosfet/transistor.

arduino PIR motion water gun circuit

Step 4: The box

now, i built a box from some 1/4 luan plywood and some VERY heavy duty super glue called “2p-10″ made by fast cap. but im not going to tell you exactly how to built it because it depends on how you want to rig it all up and how big your water tank is.

[box color=”#985D00″ bg=”#FFF8CB” font=”verdana” fontsize=”14 ” radius=”20 ” border=”#985D12″ float=”right” head=”Major Components in Project” headbg=”#FFEB70″ headcolor=”#985D00″]Arduino



For more detail: Arduino PIR motion water gun

About The Author

Ibrar Ayyub

I am an experienced technical writer holding a Master's degree in computer science from BZU Multan, Pakistan University. With a background spanning various industries, particularly in home automation and engineering, I have honed my skills in crafting clear and concise content. Proficient in leveraging infographics and diagrams, I strive to simplify complex concepts for readers. My strength lies in thorough research and presenting information in a structured and logical format.

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