Hey guys, Today I would like to show you how to make a simple sentry turret out of household Items! You would only need to get an Arduino UNO or Mega, a Ping))) Ultrasonic Range finder, two servos, and an electronic water squinter! The rest of the project is things that you may find around your house and recycle!
Contest Age Group 13 – 17
Submitted by Newton Labs for the Instructables Sponsorship Program
Step 1: Supplies!
Laundry detergent bottle (E.G. Tide…)
Laundry Detergent Cap (of the detergent bottle)
Tin Can (E.G. Evaporated Milk, Beans…)
Some sort of a flat building Material (E.G. Cardboard, Poly Carbonate sheets…)
Arduino UNO or Mega
an extra RC cable Connector
1 180º Servo Motor
1 Servo motor you can rip apart
1 Electric water squirter
Ping))) Ultrasonic Range Finder
Step 2: Step 1: Making the turret turn.
First you will need your Laundry Detergent Cap. Cut 2 parallel slits to fit a piece of your building material through to hold up the water gun. Next make two holes so that your servo can be connected to the turning piece. Now screw the Servo to the platform. You should now have a place to put your gun, on top.
Step 3: Step 2: Making the Electric water gun work.
First grab the servo you are willing to rip apart. Unscrew it and take out the electronics, before cutting the motor off of the old servo, be sure to remember where the motor was. Next take out your soldering iron and solder the two wires of the motor of the water squirter to where the old motor was. If your servo is either continuous or wont start, ajust the potentiometer until the squirter works accordingly.
Step 4: Step 3: Attaching the Gun.
All you really have to do for this step is securely tape the gun onto the top of the detergent cap.
Step 5: Step 4: Making a secondary base.
Now this is the hardest step, so read carefully (I would read this whole step before actually doing it.). First Grab the Tin can. Next grab some polycarbonate or whatever you are using as a material, and make it into a circle right on top of your can, I melted mine into a circle. Next after getting your circle, make a hole in it that the servo can fit in and make two holes for their screws too. Put the servo in and screw it to the circular platform. Get your tin can again and glue it onto the top of the tin can. Now you should have your secondary base.
Step 6: Step 5: Main Base
Now get your big detergent container, and make a hole in the area that the little press nozzle is, make it big enough so that the can can be put there. Now before putting the can in, make a hole in the can and grab the servo motor’s cable, you will need to connect that to the Arduino later. after getting the cable, glue the can to the detergent container.
Step 7: Step 6: Wiring up.
First get the extra RC cable connector and plug it into the Ping))) Ultrasonic Range Finder. Wire the Ping From GND>GND, From 5V>5V, and From Sig>Arduino’s pin 6. Next wire the Turner servo. The wiring will be From Red wire>5V, From Black wire>GND, and From White/Yellow/(any color but black or red)>Arduino’s pin 9. The squirter servo’s wire connects From Black>GND, From Red>5V, and From White/Yellow/(any color but black or red)>Arduino’s pin 10. Last and the most important, connect the programming cable to the computer.