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Pi Tracker: WiFi-Controlled Toy Using Raspberry Pi

· IoT Zone

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I was always fascinated about software and hardware interaction. But with my limited knowledge in electronics, I kept the hardware part aside and was working only in software. After having some hands on experience with my first Raspberry Pi, I decided to build a toy for my son. I purchased my second pi and some other components and this is what I built. Yes it looks ugly but worth playing with it :).


Last couple of days I was refreshing my basic electronic skills and virtually designing the software and hardware for the device. You can find so many similar RaspPi based toys and I am adding one more to it.

Yesterday evening I got the last piece of the puzzle, the rechargeable battery.  After that I spent the next 5 hrs to code the application running in the vehicle and the Remote control app for my Android tab, remote control app is based on the Acclerometer of the device. To control the toy I decided to use WiFi and use my Android tab as a steering wheel. I will go more details into the software part in a different post.

Future addition

  • Obstacle detection and avoidance system
  • Video feed to the remote control device


Rest of the post will go through the components used in the tracker and how to acquire it. If you are in Bangalore then you can get all these items from OM Electronics in SP road or you can buy online. I bought it from OM Electronics.

image Motor

Qty: 2


  • 300RPM 12V DC motors with Gearbox
  • 6mm shaft diameter with internal hole
  • 125gm weight
  • Same size motor available in various rpm
  • 2kgcm torque
  • No-load current = 60 mA(Max), Load current = 300 mA(Max)
image Chasis

Qty: 1


Powder coated Metal chasis for robots. Easy to mount the motors on place by using normal motor mount nut. It can either be used in skid steel configuration (4 motors) or differential configuration (2 rear wheels + 1 front castor wheel). The body contains perforated holes for easy mounting of various size circuit boards and other mechanical components.

Length : 190mm

Width : 105mm

Height : 40mm

image Track wheels

Qty: 4


  • 6.1 mm hole.
  • Diameter 90 mm
  • Made from high quality virgin Nylon.
  • Hole on shank for screw
  • Comes with screw to lock on standard motor shaft of 6 mm.

Track and Ribbit

Qty: 60


High quality Plastic Track  Belt and Ribbit

Specification :

  • 30mm X 20mm
  • 10mm Width
l293d-h-bridge-motor-driver-module L293D Motor Driver controller

Qty: 1


H Bridge to control the motors individually

image Jumber Wires

male to male jumber wires – 10 or more  pcs

male to female jumber wires – 10 or more pcs

female to female jumber wires – 10 or more pcs

3cell_lion_battery 12V Lithium-Ion Rechargeable Battery

12v rechargable battery + charger

Url: http://www.robosoftsystems.co.in/roboshop/index.php/12v-lithium-ion-rechargeable-battery.html

Charger: http://www.robosoftsystems.co.in/roboshop/index.php/electronics-batteries/batteries-chargers/11-1v-1000mah-15-25c-lipo-battery.html

Next part I will go through the software part of the system. Stay tuned.

The IoT Zone is brought to you in partnership with GE Digital.  Discover how IoT developers are using Predix to disrupt traditional industrial development models.


Published at DZone with permission of Sony Arouje, DZone MVB. See the original article here.

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