Frobo V2 assembling instructions

Frobo V2 is a comprehensive robotic educational kit for kids above 10 years with basic knowledge of computers. We first begin with asembling the Frobo mobile car V1. 

The kit includes-

  1. Froboduino V2 shield with programming cable
  2. Frobo V1 robotic chassis
  3. 2X BO motors & wheels
  4. Micro steering servo and front wheel assembly
  5. 1 X HC-SR4 ultrasonic sonar sensor module
  6. 2X CDS lDR light sensors
  7. 3X IR pair proximity sensors
  8. 1 X Mini piezo buzzer
  9. Connecting wires
  10. Leds
  11. Harware & tools

Assembly instructions Frobo V2-


  1. It is easy to mount the motors on the lower frame. It is done with the help of a pair of motor-holders for each motor. There are 4 slots to insert these holders in the broader rear part of the lower frame. After inserting the holders and placing the motor in between them, use two screws to fix each motor. Please see the pictures.                                                                                                                                      
  2. Once the motors are mounted, wheels can be fixed on the shafts extending outwards.                                                                                                                            
  3. Mount the control circuit PCB with screws and nuts on the lower frame. There are four holes of about 5mm each about 2cm from the front end of the lower frame. One IR diode and one photosensor are to be inserted one each side. These need to be inserted from below the frame. Please see picture.
  4. Join the Arduino Nano microcontroller with the help of the 30 PIN adaptor to the included PCB—as  per the given diagram, so that micro controller is connected properly. It should be fixed in correct orientation. If you fix it the other way, micro controller will not work. 
  5. Take the upper frame and glue the frog theme sticker on it carefully.                                                                                              
  6. A total of 7 LEDs need to be fixed on the upper frame. 2 green LEDs in the front, and 5 (2green+2red+1yellow) LEDs in the rear part. Further, 1 IR diode and 1 photosensor are to be fixed in the centre of the broader part of upper frame. A total of 9 holes are provided in the upper frame for this purpose.
  7. Mounting the front castor wheel along with the servo on the lower frame is the next step. As per the image given below, first fix the small white plastic strap with the black U-shaped metallic holder for wheel. Now, the white wheel should be fixed to its holder with the nut and screw provided. This assembly will be fixed to the lower frame from below, while the servo will be attached from above. Both these will be fixed on lower frame with the help of a single screw.                                                                                                                                  
  8. Now, ultrasonic sensor is to be fixed—with the help of 4 small screws—on a small rectangular piece of sheet provided (the back locking plate). The 2 CDS sensors (LDR) are to be inserted one on each side of this sheet—tiny holes are there. This rectangular frame can then be inserted on the front end of the lower frame with the help of two tiny extensions to match with the tiny slots.  A similar tiny extension will fit in the corresponding slot on the upper frame when we place the upper frame on the lower frame. But it will be done after wiring is done. The upper frame will join the lower frame with the help of 3 brass spacers. One screw on each end of every spacer will fix the two frames together.
  9. It is now time for understanding the programming part. We will start learning in parts different programming modules for different sensors and motion types. 

Wiring instructions Frobo V3-

Please see the wiring diagram below for clear understanding. Correct wiring is very important for the Frobo to function properly.

  1. Connect Red left motor wire to '+ve' "M1" port and green to '-ve' port. Doing it in reverse order will make motor move in opposite direction.
  2. Similarly, connect Right motor wires to port "M2".
  3. Connect Servo Red, green and orange wires to "S" port '+ve', '-ve', 'O' respectively. 
  4. Connect left led Red and Green wires to "L1" port '+ve' and '-ve', and right led to L2 port.
  5. Connect buzzer Red and Green wires to "B" '+ve' and '-ve' ports.
  6. Connect left CDS sensor Red, Green and Orange wires to "C1" '+ve', '-ve', and 'O' ports and right CDS to "C2" respectively.
  7. Connect IR diode Red and Green wires to "I" port '+ve' and '- ve' and Photo sensor Red and Orange to "P" '+ve' and 'O' ports.
  8. Connect battery terminals Read and Green wires to "PW" '+ve' and '-ve' ports. 

Here is the video for PCB Shield and Components....

Here is the video for wiring instructions....

Test the wiring-

The micro controller come pre-programmed with wiring test. Just take our micro controller from arduino Uno development borad carefully and fix it on the 28 Pin adaptor on the control PCB. Fix Motor driver IC 293D (14 Pin) in 14 pin adaptor and Op-amp LM358 (8 Pin) in the adaptor respectively.

This wiring test program checks if your wiring is correct or not. Please observe carefully. If the steps listed below do not show as stated, check the wiring and try again. In case of persistent problem, contact

  1. Slide the switch on and wait 2-3 seconds. The leds will flash in sequence along with buzzer. 
  2. Now, after led flashing, left led will glow and right will turn off and left motor will make forward and backward motion. Your left motor is connected right.
  3. The same sequence will reapeat for right motor.
  4. After motor tests, both leds will start flasing alternately and servo will move left and then right. Your servo wiring is right.
  5. Now bring your hand right 6 inches  in front of the ultrosonic sonar.  The leds will glow bright. It means ultrasonic sensor is reading your movement. 
  6. Now bring your hand 2 cms near the Ir Photo diode. Both the leds will flash together. It means IR photo sensor senses your hand.
  7. Cover left CDS sensor on the front cover with your finger, the servo will move left side and cover the right CDS sensor and servo will move right.

After testing the wiring, You are now ready to experiment with your first Arduino program.

Frobo V3 Arduino programming PART-1

Frobo V3 Arduino programming PART-2

Frobo V3 Arduino programming PART-3

Frobo V3 Arduino programming PART-4

Frobo V3 Arduino programming PART-5

Frobo V3 Arduino programming PART-6

Frobo V4 Arduino programming PART-7

Leave your comment
3/16/2018 3:53 AM
This looks very interesting. It would be great if the content in blog is well organised with menu and subsequent folder model. I am finding it hard ti understand which order i need to go through the lessons.