4 in stock (can be backordered)

SKU: FK1109 Category:


These AVR1 – programmed Robots are built to attack and retreat like their human Sumo counterparts. Two Sumo Robots move about the ring (“Dohyo”) sensing the border and retreating  towards the centre. If one Sumo Robot encounters another in its pathway it charges ahead in an attempt to push the other Robot out of the ring.

The FK1109 uses three sets of on-board InfraRed Transmitters and Receivers which are aligned as follows:

  • Two outer sets look downwards and are used to detect the black line around the Dohyo.
  • One set looks forward in order to detect other Robots.

Both the power of the InfraRed Transmitters and the sensitivity of the InfraRed Receivers are adjustable.

The large wheels feature rubber tyres that afford good grip on most surfaces.

This Robot presents a most engaging learning experience for young minds as they can adjust several aspects of the sensors and develop an understanding of how “inputs” can impact upon the behaviour of a “System”.

Set up your own “Sumo Competitions” and then experiment with changing the robots to improve your results.

The AVR MCU is also reprogrammable however third-party hardware is required to do this.
(Programming hardware  for AVR Microcontrollers not sold by Kitstop.)

(This Robot is also available as pre-assembled and tested version.  See our Part Number  “FA1109” )


Power Supply:  6V DC (4 X AA batteries)

Current Consumption: 80mA (max.)

Light sensing threshold: adjustable for each light sensor via on-board Trimmer Potentiometers.

Robot Dimensions:  140 mm X 135 mm X 70mm (5.5 X 5.31 X 2.75 in.)

Additional information

Weight 0.3 kg
Dimensions 18 × 12.5 × 7 cm