Transcript eeprom - roboconhelp

ROBOCON - 2009
ELECTRICAL ASPECTS
Motor Drivers
1. Sabertooth
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Link http://www.dimensionengineering.c
om/Sabertooth2X10.htm
Dual motor driver
Current: 10x2 A
Voltage: upto 24V
Price: $80
tried and tested, no problems
reported yet.
2. Pololu
 Link-
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http://www.robotshop.ca/home/products/
robot-parts/motor-controllers/brushedmotor-controllers/motor-controllers-byinterface/pwm-motor-controllers/pololudual-motor-driver-9a.html
Dual motor driver
Current: 2x9 A
Voltage: upto 36V
Price: $50
current limit slightly lower than
sabertooth
Seems less hardy than sabertooth
Cost effective, worth a try
3. Bakatronics
MXA066
 Link :
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http://www.bakatronics.com/sh
op/item.aspx?itemid=581
Single motor driver
Current: 1x30A
Voltage: 12/24V
Price: $30 (=$60 effectively
for dual motors)
very high current limit (of no
use to us though)
Cost effective (since some of
our applications may require
only single motor control)
Website and documentation
not very credible
SENSORS (IFM)
OO5006
1)
 Link :-
http://www.ifm.com/products/IND/ds/OO5
006.htm
 Specification:
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6 channels for 6 glass fibre optics
No mutual optical interference
Graphic display
Electronic lock & Function check output
 Sensing range: 0 ... 400mm (Through-beam sensor)
 0 ... 200mm (Diffuse reflection sensor)
 Dimensions:-123.9X76.5X70.7mm
2). OK5001
 Link :-
http://www.ifm.com/product
s/IND/ds/OK5001.htm
 Used last year
 Sensing Range:
 0 - 120mm (Through-beam
sensor)
 0 - 40mm (Diffuse
reflection sensor)
 Dimensions:- 50X30X19mm
Lithium Ion Batteries
 Energy to weight
ratio
 No memory effect
 Slow loss of charge
when not in use
 1 battery for each
microcontroller
circuit is to be used
1. Panasonic
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http://www.panasonic.com/indu
strial/battery/oem/chem/lithi
on/
Produce 3.6 V
Weight – around 45 g
Capacity – vary from 2.05 -2.5
Ah
Cylindrical
Prismatic have lower capacity
Other Manufacturers
 Ultralife –
 http://www.ultralifebatteries.com
/dealer_info.php?ID=505
 Banglore, India
Lithium ion Battery Charger
 Separate charging circuit
required since they can
be damaged if
overcharged
 Diptrace diagram of
circuit is shown
DISTANCE SENSORS
Requirement
 The need of using distance sensors arose
from the fact that Carrier bot (Autonomous)
needed a signal to start moving once the
traveller bot completes the task of boarding
the kago.
 The obstacle(traveller bot) is approximately
50 cm from the sensor and well within the
range of 80 cm which the distance sensor
can successfully detect.
SHARP GP2D12
AVAILABILITY
 5 sensors of the same type
are already available with
us providing good number
of backups.
FEATURES
 The Sharp GP2D12 is an
analog distance sensor that
uses infrared to detect an
object between 10 cm and
80 cm away. The GP2D12
provides a non-linear
voltage output in relation
to the distance an object is
from the sensor and
interfaces easily using any
analog to digital converter.
ENCODERS
Requirements
 Task of synchronizing the cago height and angle
 Moving carrier bot after 2nd check point
 We are getting encoders from IFM and probably be using
them.
Incremental Encoder
RU1045
 6 encoders are already
available
 Different from the
absolute in the sense they
require only 2 sensors ,
hence cheaper
 Work on 5V dc
 Can give accuracy upto
5000 counts per revolution
Absolute Encoders
RN6026
 2 encoders are available
 They require n contacts
for 2^n counts
 Work on 10-30V dc
EEPROM
 Electrically Erasable Programmable Read-Only
Memory
 To store small amounts of data that must be
saved when power is removed.
 We are using the serial interface to EEPROM.
 Price:-Freely available on microchip of any
memory size ranging from 128bit to 1Mb.
I²C™
Serial
EEPROM
SPI Serial
EEPROM