fischertechnik ROBOTICS Mini Bots Installation and operation manual

Mini Bots
ROBOTICS
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Welcome to the world of fischertechnik's ROBOTICS line 3
Some General Information 3
Electricity 3
Robots, Artificial Humans? 4
ROBOTICS, (Almost) Everything Automatic 4
Component Explanations 4
ROBOTICS Module 5
Power Supply 5
Slide Switches (DIP Switches) 1-5 6
XS Motor 6
Pushbutton Switch 7
Trail Sensor 7
Mini Bots 8
Mobile Robot 8
Hindrance Detector 9
Trail Searcher 10
Hindrance Detector with Trail Sensor 10
Teach-in Mobile Robot 11
Programs and DIP Switch Positions 14
More intelligent control - fischertechnik ROBOTICS 15

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ROBOTICS
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Welcome to the world of fischertechnik's ROBOTICS line
Hello!
Congratulations on your purchase of the
"ROBOTICS Mini Bots" Construction Set from
fischertechnik. With this construction set you can
build and control a number of interesting Mini Bots; our
pet name for mobile robots.
Reading through this educational information and trying out the various
Mini Bots will familiarize you step for step with the various applications
for sensors.
Now we wish you a great deal of fun and success experimenting with
your ROBOTICS Mini Bots.
Your team from
Some General Information
Before we really get started with the construction set, you still need to
know a few things. Even though the components we will work with are
very robust, if you do not handle them properly, they can be damaged
under certain circumstances.
Electricity
As you certainly know, a lot of the components in the ROBOTICS
Mini Bots Set use electric power. And you know it is necessary to
be particularly careful not to make any mistakes when working with
electrical components. That is why you should always read the assembly
instructions very carefully when wiring the electrical components.
Never connect the positive and negative poles directly to one another
which would result in a short circuit. This can damage the ROBOTICS
module.
The subjects of electricity and electronics are just as
interesting as robotics (which is what this construction
set is about) and there is a construction set from
fischertechnik, which deals specifically with these
subjects. If you are interested in this, you will also have

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just as much fun with our "PROFI Electronics" construction set as with
the ROBOTICS Mini Bots Set.
Robots, Artificial Humans?
What is your first thought when you hear the word "robot?" Have you
ever seen a robot? In a movie or on television? Or perhaps a real one?
There are many different types of robots. Some robots
look a bit like a human, while others have only one or
more arms. So, what exactly makes a robot a robot?
The dictionary says: "Robots are stationary or mobile
machines, which perform set tasks according to a certain
program."
ROBOTICS, (Almost) Everything Automatic
Thus, robots are machines controlled by a program. And we call this
control of machines (or in our case models) "ROBOTICS."
The "ROBOTICS Mini Bots" Set provides a great start for this subject,
because the construction set contains everything you need to build and
control various mobile robots.
Component Explanations
The construction set contains all of the following
First, it contains numerous fischertechnik building blocks, as well as
motors and sensors and colored assembly instructions for building
various models.
After you have unpacked all the building blocks, it is necessary to first
assemble a few components such as installing plugs on the cables
before you can really get started. Details are given in the assembly
instructions under "Assembly Tips." It is best to do this first.

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ROBOTICS Module
Your ROBOTICS Mini Bots Construction Set contains the ROBOTICS
module. This corresponds to a small computer – not nearly
as powerful as a PC, but fully sufficient for the
following control experiments.
You cannot program the ROBOTICS module
your self. Various programs are already
permanently stored in the module. The program from the "teach-in
mobile robot" is an exception. This program allows you to create a short
motion program using the two buttons. The small slide switches allow
you to select and run the program for the model you want to control.
Power Supply
The ROBOTICS module works
only when it is connected to a
9 V power supply. For this pur-
pose use the battery tray with a 9 V block battery
either as dry cell or rechargeable battery. When
connecting ensure that the polarity is correct (red
= positive). When the module is suppled with
power correctly, the green LED illuminates.
Inputs I1 - I3: Outputs Motor M1 and M2:
You can connect the fischertechnik
sensors to these inputs. They provide
information on the module. Two
buttons and one trail sensor are
available as sensors.
You can connect the XS motors to the
two outputs.
M1 M2
I1 I2 I3
Motor outputs
DIP switch
Inputs
Potentio-
meter

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Slide Switches (DIP Switches) 1-5
The position of the five slide switches, also known as a
DIP switch, determines the function of the ROBOTICS
module. The desired program can be set with these
switches. Here it is necessary to ensure that the DIP
switch is in the position required for the particular model. Each switch
has two positions: "ON" (up) and "OFF" (down).
Important: The ROBOTICS module checks which programs is to be
run when the power is switched on. Always set the desired program
before switching on the power supply.
Actuators
Actuators are all components, which can perform some type of action.
This means that they become "active" in some way when they are
connected to electric power. In most cases you can see this directly. A
motor runs, an indicator light illuminates and so forth.
XS Motor
The XS motor is an electric motor, exactly as long and high as a
fischertechnik building block. In addition, it is very light. This means, you
can install it at points too small for the big motors.
Both gearboxes included in the construction set fit perfectly on the XS
motor.
The XS motor is designed for a supply voltage of 9 volts and a maximum
current of 0.3 amperes.
Sensors
Sensors are so to speak the counterpart to the actuators. This is because
they do not perform any actions, but react to certain situations and
events. For example, a pushbutton reacts when pressed, allowing an
electric current to flow or interrupting its flow.

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Pushbutton Switch
The pushbutton could also be called a touch sensor. Pressing the red
button actuates a switch mechanically allowing electricity to flow from
contact 1 (middle contact) to contact 3. At the same time the circuit
between contacts 1 and 2 is interrupted. So you can use the pushbutton
in two different ways:
As a "Normally open switch" (NO or push-to-make switch)
contacts 1 and 3 are connected.
Pushbutton is pressed: Electricity flows
When the pushbutton is not pressed:
Electricity does not flow
As a "normally closed switch" (NC or push-to-break switch)
contacts 1 and 2 are connected.
Pushbutton switch pressed: No electricity flows.
When the pushbutton is not pressed:
Electricity flows.
Trail Sensor
The infrared trail sensor is a digital sensor for identification of a black
trail on a white background at a distance of 5 to 30 mm. It consists of
two transmitter and receiver elements. For connection you need a digital
input on the ROBOTICS module and the 9 Volt power supply (positive
and negative poles) on the battery tray.
3
1
2
3
1
2

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Mini Bots
With the ROBOTICS Mini Bots
Construction Set you can build one of the
Mini Bot models: mobile robot, hindrance
detector, trail searcher, hindrance detector
with trail sensor or teach-in mobile robot.
The descriptions of the models below
explain exactly what the models can do.
Important: The program setting is checked only when the
ROBOTICS module is switched on. If you change the program after
switching on, it is necessary to momentarily interrupt the power
supply to activate the new program.
Mobile Robot
DIP switch setting:
To help you get started the mobile robot model is not initially
equipped with sensors. After setting the DIP switches for
the mobile robot program as shown above, connecting the
power supply on the battery tray and starting the ROBOTICS
module program, the two drive motors start turning and the
mobile robot moves forwards.

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The potentiometer on the ROBOTICS module allows you
to control the speed of the two drive motors. When the
potentiometer is in the middle position (viewed from above,
so that the DIP switch designation is easily legible) both drive
motors turn at the same speed propelling the Mini Bot straight
ahead. Turning the potentiometer to the left causes it to curve
to the left while moving forwards. Turning the potentiometer to
the right causes it to curve to the right while moving forwards.
Hindrance Detector
DIP switch setting:
The Mini Bot hindrance detector is equipped with two
mini-switches on the two bumpers which serve as sensors.
After starting the program the Mini Bot moves straight
ahead. It continues this until one of the bumpers touches
an obstacle.
If, for example, the left bumper, as seen when facing in
the direction of motion, hits against a hindrance, it moves
back a short distance. During this maneuver it also deviates
by turning to the right, and then continues to move forwards. This
deviating motion helps the Mini Bot to move around an obstacle or out
of a corner.
You can set the distance for this deviation on the potentiometer. When
the potentiometer is set to the middle position, the deviation is identical
in both directions. Turning the potentiometer to the left (viewed from
above, so that the DIP switch designation is easily legible) increases the
deviation to the left accordingly and reduces the deviation to the right by
an equivalent amount.

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Trail Searcher
DIP switch setting:
On the trail searcher model a further sensor, the trail sensor,
is attached in addition to the two mini-switches acting as
sensors on the two bumpers. With the aid of the trail
sensor the Mini Bot trail searcher can follow a trail in
the form of a black line.
The mini-switches as sensors on the two bumpers
serve for recognition of hindrances located along the
black trail. If one of the two mini-switches is tripped by
hitting against an obstacle, the Mini Bot trail searcher moves
back, makes a deviating motion and then continues to move forward
again while it looks for the black trail.
An obstacle course is included in the construction set. A black trail is
printed on it, which you can use for this model. For this purpose place
the Mini Bot trail searcher in the middle of the obstacle course and
switch on the power supply on the battery tray. The Mini Bot then moves
forward in a spiral until it finds the black trail, which it then follows.
However you can also draw a trail on a large sheet of white paper with a
black marker. This black trail should be at least 20 mm wide for the trail
sensor to work properly.
Hindrance Detector with Trail Sensor
DIP switch setting:
As the name of this Mini Bot suggests, it is an upgraded version of
the hindrance detector model with a trail sensor.
The mini-switches on the two bumpers serve as sensors
and the potentiometer has the same function as on the
Mini Bot hindrance detector.
The trail sensor on this model is an additional sensor
for recognition of hindrances in the form of a black line.
If the trail sensor recognizes a black line, the Mini Bot
also moves back, deviates by turning and then continues

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to move forwards. The setting on the potentiometer also has an effect
on the deviation caused by the trail sensor.
The trail sensor consists of two transmitter and receiver elements as
described under sensors. With the aid of these two transmitter and
receiver elements the trail sensor can recognize how the Mini Bot
makes contact with the black line acting as a hindrance and deviates
accordingly. When, for example, the transmitter and receiver elements
on the left side detect a black line first, the Mini Bot moves back while
deviating to the right. In this case the trail sensor activates the same
action as the mini-switches acting as sensors on the bumper.
You can also use the obstacle course from the construction set for the
hindrance detector model with trail sensor. For this purpose place the
Mini Bot in the middle of the obstacle course and switch on the power
supply on the battery tray. The Mini Bot then continues to move forward
until it touches a hindrance with the bumper or recognizes a black line
with the trail sensor.
Teach-in Mobile Robot
"Teach-in" is a concept from the world of robotics.
A wireless or cable type remote control is used
to move the robot to the desired positions, which
are then saved in a program. The robot then moves
precisely to these positions with the aid of the
program.
With the teach-in mobile robot you can program the
motion path yourself using the cable remote control integrated into the
model.
To program the teach-in mobile robot it is necessary to set DIP switches
1 and 5 to ON.
DIP switch setting for creating program:

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With the left button on the cable remote control you can switch on the
drive motor on the left side of the Mini Bot when viewed facing in the
direction of motion; the right drive motor can be actuated with the right
button. The button pressed as well as the period of time it is held down
is saved in the ROBOTICS module. This means that you can control your
Mini Bot to move around hindrances with the cable remote control.
This path is recorded and saved in the ROBOTICS module during the
teach-in operation. When you are finished teaching in your Mini Bot, it is
necessary to set DIP switch 1 to OFF. This is the signal for the ROBOTICS
module that the program is finished and that further entries will not be
made with the cable remote control.
To run the program it is first necessary to switch on the power supply
for the ROBOTICS module on the battery tray. There are now two
possibilities for running the program:
Possibility 1: Run program once
DIP switch setting for running program once:
After setting DIP switch 5 to ON and all others to OFF, you can switch
on the power supply for the ROBOTICS module on the battery tray. The
program last saved is then run through once. To run the program again,
it is necessary to switch off the power supply to the ROBOTICS module
and then switch it back on.
Possibility 2: Run program in endless loop
DIP switch setting for running program in endless loop:
Proceed as follows to have the Mini Bot teach-in mobile robot run along
a path continuously. After setting DIP switches 2 and 5 to ON and all
others to OFF, you can switch on the power supply for the ROBOTICS

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module on the battery tray. The program last saved is then run through
in an endless loop. This means that the program starts over again as
soon as it is completed. The program continues to run in an endless loop
until you switch off the power supply to the ROBOTICS module.
Note: The program last saved remains stored in the ROBOTICS module,
even when the power supply is switched off. It remains stored until it is
written over with a new program.

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Programs and DIP Switch Positions
Important: The program setting is checked only when the ROBOTICS
module is switched on. If you change the program after switching on, it
is necessary to momentarily interrupt the power supply to activate the
new program.
Program DIP1 DIP2 DIP3 DIP4 DIP5
No program 0 0 0 0 0
Mobile robot 1 0 0 0 0
Hindrance detector 0 1 0 0 0
Trail searcher 0 0 1 0 0
Hindrance detector with trail sensor 0 0 0 1 0
Create program for teach-in mobile robot 1 0 0 0 1
Teach in mobile robot: start program in
memory, run through once 0 0 0 0 1
Teach in mobile robot: start program in
memory, run through as endless loop 0 1 0 0 1
Legend: 0 = "OFF”, 1 = "ON”
LED Description
LED illuminates
continuously
•Power supply OK.
•ROBOTICS module ready for operation
LED flashes once
•When power supply is switched on
•Input to I1, I2 or I3
•At conclusion of programming teach-in mobile
robot
LED does not illuminate
after switching on power
supply
•Power supply not OK (check 9 V block
battery/rechargeable battery; a voltage of >
6.5 V is required)
•Power supply polarity incorrect
•ROBOTICS module defective (contact
fischertechnik Service: [email protected])

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More intelligent control - fischertechnik ROBOTICS
We hope you have had a lot of fun controlling the models from your
ROBOTICS Mini Bots construction set.
Perhaps you can build a few new models yourself and control them with
the ROBOTICS module. Sooner or later you are certain to reach a point,
where the programs are no longer sufficient to control the models the
way you want. Perhaps you would like to build a model with more than
two motors and more or different sensors and realize a certain technical
process. Then you are ready for the next stage in the ROBOTICS line.
The LT Controller (ROBOTICS LT Beginner Set) with two outputs for
actuators (e.g. motors) and three inputs for sensors (e.g. mini-switches)
serves as an introduction to ROBO Pro programming. The next stage is
the TXT Controller (ROBOTICS TXT Discovery Set), which allows four
motors to be controlled simultaneously. It also has eight inputs for
sensors (e.g. mini-switches, phototransistors, reed contacts and much
more). Moreover it has provisions for Bluetooth, WiFi and much more.