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This assembling guide is based on the yellow D.I.Y. kit p. 416 - 14.8 D.I.Y. Build your own Android bluethooth robot

Build a bluetooth robot controlled from your mobile device using a L298N motor controller module.

  • yellow board x 1
  • USB cable x 1
  • Breadboard x 1
  • SRF04 or SRF05 ultrasonic range finder x 1
  • 0.1μF capacitor (marked 104 or μ1J63) x 2
  • L298N motor controller module x 1
  • HC-05 or HC-06 Bluetooth SPP module x 1
  • DC motors with gearbox x 2
  • Robot wheels x 2
  • Plastic parts x 2
  • Screws*
  • Holder for 8 AA batteries
  • Smartphone or tablet with Bluetooth capability x 1
  • Jumper wires

* Please refer to the image below to identify what is inside your transparent screws bag. Note that you may find some more pieces than you need.


Build your robot and place the components on your breadboard as shown in the drawings.


You can start working on the assembling of the robot holding the bottom of the bigger plexi base (refer to the “TOP” label engraved on the plexi to be sure you hold it in the right way). Attach the two small plexi bars with 2x Ø 3mm x 12 mm screws and respective nuts. Fix the motors with 6x Ø 2mm x 6 mm screws as shown in the picture.


Turn the assembly upside up (check the “top” label) and attach the castor wheel with 2x Ø 2mm x 8 mm screws. Fix the Yellow board with the 4 plastic pegs provided in the yellow board box.


Fix the L298N motor controller module to the smaller plexi base using the 4x Ø 2mm x 10 mm screws (place the plastic spacers between it and the plexi base and fix it using the nuts as shown in the picture). To connect the breadboard, remove the protective film and attach the breadboard in the appropriate space.


Place the smaller plexi on the bigger one and fix the motors between them with the remaining 6x Ø 2mm x 6 mm screws. Fix the wheels to the appropriate gears of the motors, attaching them with the 2x Ø 2.2mm x 6.5 mm self-tapping screws.


You will now place the HC-05 Bluetooth SPP module and all the electronics components on your breadboard. Follow the drawing to connect all the modules together in order to make your robot working!


From the Github repository you can download the exercise sketch (48_14.8.ino) and open it in the IDE.

Download Sketch

Compile and upload the code. Next, install the Bluetooth remote control APP following the next steps.


It’s now time to download the BT Robot app, available for Android and iPhone / iPad. Download it for your respective device, choose an exercise from the list and get ready to start!

Get the App for Android from Play Store

For Windows users

Open your phone or tablet’s Settings app. Tap Connected devices → Connection preferences → Bluetooth. Make sure Bluetooth is turned on. Tap Pair new device. (Tap the name of the Bluetooth device you want to pair with your phone or tablet.) If needed enter the default module password “1234” to pair it.

Once connected, open your BT robot app. In the settings menu, you will see the module appearing in the list of paired devices. Tap on it and you will start controlling your Robot.

* What’s Next is a trademark of what’s next GmbH. Apple, the Apple logo, iPhone, and iPad are trademarks of Apple Inc., registered in the U.S. and other countries. App Store is a service mark of Apple Inc., registered in the U.S. and other countries. Google Play and the Google Play logo are trademarks of Google LLC.


You will be able to control the BT robot through the dedicated APP.

wiki/diybtrobot.txt · Last modified: 2019/05/28 11:18 (external edit)