MACH 1/7
Daniel Bressan
David Tran
Robbie Banks
Amit Kapoor
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David Tran
Produce an awesome
workable RC car from
scratch
Top speeds of over
100 mph
Program GUI
interface to control the
car from laptop
Design mechanical
chassis and shell for
car
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Low: Function Car
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Mid: 30-50 MPH
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Using ECS preprogrammed chip
Driving, with GUI and
900MHz RF
Low end (cutting board)
Chassis
Gate drivers working
High: 100+ MPH

Build own Chassis and
Shell
David Tran
David Tran
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We will build a GUI
interface to control the car.
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Input:
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Power from wall
RS-232 Signal for speed
Output:
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Mouse
Keyboard
RS-232 Signal to CPU to
control speed and steering
Will start coding as soon
as PCB is ordered
Amit Kapoor
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Not much changed
since PDR
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Xtend PKG - 900 MHz
Tested and working
Amit Kapoor
David Tran
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MSP430-F2616
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Inputs Tx/Rx and
digital optical
encoder information
Outputs PWM for
servo and PWMs for
gate driver
MAX232

Interprets RS-232
signal
David Tran
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User timers and DAC
to generate sinusoid
Pulse widths from sin
table
Servo Control
David Tran
Daniel Bressan
Daniel Bressan
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LiPo 3 cell 11.1 V


Powers motors and
everything isolated
on that side
LiPo 4 cell 14.8 V

Regulated for:
 3.3 V TLV-1117 33
 5 V TLV-1117 50
 9 V LM2940 9.0
Daniel Bressan
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14.8 V, 1Ah LiPo
regulated for:
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3.3 V MSP430
5V
 Optical Encoder
 Max 232

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9 V RF
11.1V, 5Ah LiPo Motor
side

5V
 Optoisolater VO0630T
(right)
 DC motor for Gyroscope
 Servo

Transistors
Daniel Bressan

Speed Encoders
US Digtial E5
32 CPR (cycles per
revolution)
 Max RPM 60,000
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Sensors
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NONE!
Threw out inclinometer
and force sensor ideas
Steering
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Pre-Built Servo
 PWM
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Gyroscope
Daniel Bressan
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Takes three PWM inputs
Max RPM of 60 kHz
Four pole motor
Max input frequency
2kHz
RPMs can be calculated as
follows
RPM = 120 * f/p
p = poles
With our wheels and
rotational speed we could
achieve a velocity of 700
MPH
Robbie Banks
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Constant torque up to
the rated frequency
Can go past rated
frequency but lose
torque
Robbie Banks
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Dual Channel Opto-Isolators
Gate Driver
Triple Half-Bridge Driver
Robbie Banks
Robbie Banks
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Using Opto-Isolator for
separation
Powered by a regulator
connected to the motor
power supply
Takes PWM inputs from
microcontroller
Digital Opto-Isolator highlow threshold of .8V
Rise time of 23ns and Fall
time of 7ns
Max frequency of
33.3MHz
Robbie Banks
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Three PWM inputs
Amplifies PWM inputs
Dead time setting to
prevent shoot through
Disable input signal
Six output signals, three
high and three low
Powered directly by the
three cell 11.1V LiPo
battery
Robbie Banks
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Uses six AUIRL1404ZS
MOSFETS
High Power NMOS
transistors
Continuous drain current
of 160A
VGS of 10V
Each source on the
MOSFET is connected to
the gate driver to ensure a
VGS of at least 10V
Powered directly from the
three cell 11.1V LiPo
battery
Robbie Banks
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For testing and low level design:
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Kitchen cutting board chassis
High level design (after machine shop
training):
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Chassis and Shell possibly out of acrylic.
 ITLL has an acrylic cutter

Will start full designs
after PCB is ordered this
week
Robbie Banks
Task
Amit Daniel David Robbie
Electrical

Control Systems
Power Systems
Populate PCB
x
x
x
x
x
x
x
x
x
Mechanical
Chassis
Mounts
Controls
x
x
x
x
x
x
x
x
Software
x
x
x
x
Micro Controller
x
x
Integration
Testing
x
x
x
x
x
x
x
x
x
x
x
x
GUI
Systems
Documentation
Amit Kapoor
Main Changes:
David: mostly software,
getting PWMs to work
properly
 Amit: Learning and
teaching us Altium, and
software with David
 Robbie: Gate Driver
and Power
 Daniel: Power, and
other simple
components, helping
Robbie

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Changes to Schedule:
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Amit Kapoor
Behind on ordering
PCB (should finish
this week)
Behind on
programming GUI,
will start as soon as
PCB is ordered
Ahead of schedule for
gate driver
Item
Price
Quantity
Component Batt
$ 12.00
AA Batt
$
Total Price for Part Comments
2$
24.00 14.8V 1Ah
0.50
16 $
8.00 EE store
Batteries
$ 80.00
2$
160.00 11.1V 5Ah
Optoisolators
$
-
10 $
- Sampled Vishay
Gate Driver
$
-
2$
- Sampled Intersil
Voltage Reulators
$
-
30 $
MSP430
$
-
4$
Power MOSFET
$
4.00
12 $
Optical Encoder
$ 62.00
1$
62.00 US Digital E5
Charger
$ 65.00
1$
65.00 Passport LiPo charger
3-phase Motor
$ 225.00
1$
225.00 Mamba Monster
Various RC Car Parts
$ 140.00
1$
140.00 Servo, Wheels, Axels
Total
$
Amit Kapoor
- Sampled TI/National Semiconductor
- Sampled 64 and 80 pin
48.00 IR
732.00 + Tax and shipping
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Milestone I
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Milestone II
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PCB testing (hopefully we’ll have it back)
Working Gate Driver
MSP430 communicating with gate driver
Driving Car
EXPO!
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Car going 100+ MPH
Amit Kapoor
Daniel Bressan