Plobot with Ultrasound Sensor

I modified the original design of Plobot V02 by cparrapa (https://www.thingiverse.com/thing:1039101) to add two ultrasound sensors and due to the little space I added a new module.

You can see the robot in: https://youtu.be/T_W7CjehS4c

You will need:

1 Arduino Nano http://s.aliexpress.com/nURFzAve
1 Shield Arduino Nano http://s.aliexpress.com/aqmiMNFR
2 Ultrasound sensor HC-SR04 http://s.aliexpress.com/2UNJRrAN
1 Port battery 4X1,5V AAA http://s.aliexpress.com/In63uAZf
2 6 V N20 Micro Gear Motor con Rueda De Goma para Robot Smart Car http://s.aliexpress.com/mMrUVvya
1L9110S puente H Stepper Motor Dual DC http://s.aliexpress.com/2eaA3ya6
1 Led RGB 10mm http://s.aliexpress.com/uEbYjqMf
1 Buzzer 5v http://s.aliexpress.com/6bUbMruE
10 cm longitud 40 p línea dupont wire hembra a hembra http://s.aliexpress.com/3Afmyimi
Many M3 nuts and bolts

I upload the arduino software to github: https://github.com/bhm93/plobot