Analog Electronics > Android, Roomba and Bluetooth!
Date: Friday, January 4, 2013 - 22:09
Difficulty: Begginer
Views: 1416

Author: Saeid Yazdani

Are you a Roomba owner, and do you use an Android based phone or tablet? If so, following a few simple steps will put you in control of your Roomba! So get ready for some simple electronics!
 Circuit's explanation

As the description of this article told you, its quite easy to make a bluetooth connection for your Roomba. All you need to have is a prefboard, a Bluetooth module (BlueSmirf Silver) a voltage regulator and bunch of headers and wires. I also asume that you have a soldering Iron and you do have a bit of expirience with soldering!

So here is the recommended components list:

  • BlueSmirf Silver Bluetooth Module
  • LM7805 Voltage regulator
  • Normal 5mm LED
  • 330 Ohm resistor
  • 1x4 pin male header
  • 1x6 pin male header
  • some femal-to-male jumper wires
  • A rather small pref/proto board for soldering the components on

Here is the circuit's schematic:

The circuit explanation is quite trivial. Since Roomba's battery operates in range of 14V to 20V, a voltage regulator (LM7805) is necessery to regulate the Roomba's voltage to 5V that is the suitable voltage for  BlueSmirf Silver" Bluetooth module.

The resistor and LED are optional, the LED will just show if the board is connected to Roomba. Also you may add a On/Off switch in series with +14V from roomba to be able to turn the whole circuit on or off.

For more explanation and the demo please watch my video on YouTube:

Once you built the circuit, go ahead and use any Roomba Control app from google's app store.

If you have any question about this project, feel free to comment below or ask in our forum.


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