BLUETOOTH NERF
TURRET .
INTRO .
On this page you will find everything you need to build a 3D printed Bluetooth Nerf turret .
Nothing super complex here .
The tilt and pan movement is handled by 2 servos driven by an arduino Nano .
The darts are shot using 2 rollers spun by 2 small dc motors . A servo push the darts into the rollers when the order to shoot is sent .
The magazine can hold 7 darts .
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This turret is controlled via Bluetooth either using a PC app or an Android app .
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PC app :
Android app :
WHAT YOU NEED .
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TOOLS .
- screwdriver
- wire stripper
- pliers
- soldering iron
- multi-meter
- crimping tool .
And a 3D printer...
HARDWARE
- 4 M5x20 countersunk screws
- M2x10 self taping screws (around 30)
- 1.5mm metal rod
- dupont connectors
- 2.1x5.5mm jack plug
- wires
- 2x type 130 dc motors (rated 9V or more)
- arduino Nano (or clone)
- HC-05 Bluetooth module
- LM2596 buck converter
- 1x MG-90s servos + 2x MG-90s or MG996r servos
- FR207 rectifier diode
- RFP30N06LE mosfet
- resistors (10kΩ, 330Ω, 680Ω)
- heatshrink tubing
- 20mm rubber band
- 9V power supply (2.5 amps minimum)
PARTS
You can also find them on the DOWNLOAD PAGE
Some parts come in 2 versions .
The base can be fitted with either a MG-90s or a MG996r servo .
The tilt bracket and barrel can also be fitted with either a MG-90s or a MG996r servo .
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MG996r servos can be power hungry . Make sure your power supply will be up to the job if you decide to use them .
There are also 2 versions of the long leg to accommodate different style of jack plugs .
ASSEMBLY .
WIRING .
software (and servos setup) .
We will now see how to use the software and setup the servos .
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The software comes in 3 versions :
- An executable that you just have to download and run (this is great if you can't code . unfortunately this only works on windows) .
- An android app
- A repository including all the python and UI files required to run the program . Feel free to improve and build upon the existing code !
You can also find them on the DOWNLOAD PAGE
STEPS TO FOLLOW :
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IMPORTANT : Make sure you disconnect the Rx and Tx pins of the Bluetooth module and the Vin pin when Uploading the program to the arduino .
- Upload the sketch (LFK_turret_arduino.ino) to the arduino then disconnect the arduino from your computer .
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- Before plugging the power supply, unscrew the tilt, pan and recoil servos . This is to make sure that the barrel doesn't crash into the base on startup .
- Plug the power supply .
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- Now you should be able to pair the Bluetooth module to your device (PC or android phone) .
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- If you are using a PC, find the COM port used by the Bluetooth module in the device manager .
- Start the software then connect to the turret . If you are using the PC app you will be asked what COM port to use .
- Screw the recoil servos horn in the furthest back position .
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- Once you are connected to the turret place you mouse cursor at the top centre of control pad then screw the tilt and pan servos with the barrel facing up .
Done!!! Load the darts and have fun!!!
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