Let's Make Robots!


Bluetooth remote controlled robot capable of taking pictures
ArDuArduino023code.pde7.42 KB
JPEG_Camera_Libraries_1.zip87.25 KB
ArDuProcessing.zip318.26 KB

Ar-Du is finally finished.


The block diagram:

Digital I/O PINs:
Pin0 (Rx) : BT module Tx Pin
Pin1 (Tx) : BT module Rx Pin
Pin2 : NewSoftSerial Rx – JPEG camera Tx
Pin3 : NewSoftSerial Tx – JPEG camera Rx
Pin4 : Motor1 diredtion select 
Pin5 : Motor1 speed (PWM) 
Pin6 : Motor2 speed (PWM)
Pin7 : Motor2 diredtion select
Pin8 : Sound Module
Pin9 : Head rotating servo
Pin10 : Blue LED
Pin11 : Red LED
Pin12 : Ultrasound module – Trigger pin
Pin13 : Ultrasound module – Echo pin

Analog PINs:
Analog0 : –
Analog1 : –
Analog2 : –
Analog3 : –
Analog4 : –
Analog5 : –


The main components include the following:

- First I wanted to use an Arduino board, but it could not fit into Ar-Du. Than I changed the to a much smaller RBBB board.

- a BlueSmirf Bluetooth module

- a LinkSprite serial camera

- a DC motor controller board (based on a L293D and a hex inverter IC)

The Motor controller assembled on a proto board:

- a Sound Module based on an ISD 1730 IC (this circuit is for playback only to reduce space, otherwise it would not fit into Ar-Du).

The first version of the Sound module was assembled on an Arduino protoshield, but it was too large to fit into the robot. The second version is much smaller...


I have created a sound sample on http://www.r2d2translator.com 

To record the sound sample, temporarly I have assembled the following circuit on a breadboard (source: ISD1700 datasheet):


- a HC-SR04 ultrasonic sensor

- a hobby microservo

 - a Blue and a Red LED

This is how it looks like fully assembled:


Here is a sample picture of the control interface:


I have attached the Arduino and the Processing codes.

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awesome work

The nerdy fanboy side of me just died a little from pure joy :) Very nice work!

Very nice handcrafted robot body. Neat details and the HC-SR04 is for once vertical and embedded. Collected!

This robot will get +10 points ;-) Oh i love this little guy since first sight.

The robot is 19 cm tall (approx. 8 inch). The body is made of PVC pipe joints, the head is made of some black spherical plastis, which I found in the local hardware store. I found on the net a PDF file about how to make a paper R2D2 . I have printed out on an A3 size paper, cut it out and glued on the PVC pipe.

Good looking robot and nicely documented.

After I saw what you were using it for I wondered why you didn't just use a pair of transistors and 4 resistors like this:

Another image with more information regarding the resistor values:

My knowledge in analog electronics is limited, so I prefer to use digital components (and I did not have transistors, only a hex inverter when I made the circuit). 


I have seen the diagram and thought I would share. I kinda figured the inverter was used due to you having it. And, while I am at it, very nice robot and documentation.

It looks really good, maybe the next version will be bigger ?