Senior Design I Project

Summer B 2006

Overview

Objectives Constraints Possible Components

Project Objectives

To Modify a Remote Control Toy Car To propose a new programmed behavior for the device

The programmed behavior should be easily changed by means of program download

To Understand how the original device works by doing reverse engineering

To obtain system parameters by doing pre-modification benchmarks (Speed and reaction time before hitting and object in the car path)

Modify the device to accomplish the desired functions with an effective use of the determined benchmarks

Easy To Use Economic Simple Circuitry

Constraints

The project will be based on the Microchip PIC18F877A All the original electric components of the car must be physically

removed from the car except for the motor, battery, switch and steering actuator.

The car must be factory equipped with either a 6V or 9.6V block type rechargeable battery (No AA batteries allowed)

Each modified device should have at least three different behaviors Project Should be completed by the presentation date indicated in

the syllabus Teams should be composed of three or two members. There cannot

be more than one two members team in the class. If there is a single person without team I will assign that person to a

team of my choice.

Extra Credits

There will be extra credits for:First fully functional projectBest Accomplished project

Extra credit can range from 1 to 5 absolute points

Components: GP2D12

Sharp GP2D12 Analog Distance Sensor http://www.parallax.com/detail.asp?product_id=605-0000

3 Features

Less influence on the color of reflective objects, reflectivity Line-up of distance output/distance judgement type

Distance output type (analog voltage) GP2DI 2 Detecting distance 10 to 80cm

Distance judgement type: GP2DI5 Judgement distance 24cm. Adjustable within the range of 10 to 80cm) 3. External control circuit is unnecessary

GP2D12.pdf $11.95

Components: GP2D12

80 cm

2.4 V

Components: GP2D12

14,000 lx

Components: 28015

Parallax's new PING)))™ ultrasonic sensor provides a very low-cost and easy method of distance measurement. This sensor is perfect for any number of applications that require you to perform measurements between moving or stationary objects.

The PING)))™ sensor measures distance using sonar; an ultrasonic (well above human hearing) pulse is transmitted from the unit and distance-to-target is determined by measuring the time required for the echo return.

http://www.parallax.com/detail.asp?product_id=28015 28015.pdf

Components: 28015

Features Supply Voltage: 5 vdc Supply Current: 30 mA typ; 35 mA max Range: 3cm to3 m( 1.2in to 3.3yrds) Input Trigger: positive TTL pulse, 2 uS mm, 5 uS typ. Echo Pulse: positive TTL pulse, 115 uS to 18.5 mS Echo Hold-off: 750 uS from fall of Trigger pulse Burst Frequency: 40 kHz for 200 uS Burst Indicator LED shows sensor activity Delay before next measurement: 200 uS Size: 22 mm H x 46 mm W x 16 mm D (0.84 in x 1.8 in x 0.6 in

$24.95

Components: 28015

Components: 28015

Components: 28015

Components: Memsic 2125 Dual-axis Accelerometer The Memsic 2125 is a low cost, dual-axis thermal accelerometer

capable of measuring dynamic acceleration (vibration) and static acceleration (gravity) with a range of ±2 g

Key Features of the Memsic 2125: Measure 0 to ±2 g on either axis; less than 1 mg resolution Fully temperature compensated over 0° to 70° C range Simple, pulse output of g-force for X and Y axis Analog output of temperature (TOut pin) Low current operation: less than 4 mA at 5 vdc

http://www.parallax.com/detail.asp?product_id=28017 Memsic 2125.pdf $ 29

Components: Memsic 2125 Dual-axis Accelerometer How It Works Internally, the Memsic 2125 contains a

small heater. This heater warms a "bubble" of air within the device. When gravitational forces act on this bubble it moves. This movement is detected by very sensitive thermopiles (temperature sensors) and the onboard electronics convert the bubble position [relative to g-forces] into pulse outputs for the X and Y axis.

The pulse outputs from the Memsic 2125 are set to a 50% duty cycle at 0 g. The duty cycle changes in proportion to acceleration and can be directly measured by the BASIC Stamp. Figure 2 shows the duty cycle output from the Memsic 2125 and the formula for calculating g force.

Components: IR Transmitter Assembly Kit FEATURES

D= 940 nm Chip material = GaAs Package type: T-1 (3mm) Matched Photosensor: QSC112 Narrow Emission Angle, 24° High Output Power Package material and color: Clear, peach tinted plastic

http://www.parallax.com/detail.asp?product_id=350-00017 QEC112.pdf $2.40

Components: IR Transmitter Assembly Kit

Components: PNA4601M Infrared Receiver

Features Extension distance is 8 m or more External parts not required Adoption of visible light cutoff resin

For infrared remote control systems $3.95 http://www.parallax.com/detail.asp?

product_id=350-00014 PNA4601M.pdf PNA4601Mapp.pdf

Components: PNA4601M Infrared Receiver

Components: PNA4601M Infrared Receiver

Components: PNA4601M Infrared Receiver

Componebts: Infrared Transistor #: 350-00018 A phototransistor is a

light-sensitive device similar to other transistors which act as current amplifiers, except that it converts visible light, or photons, to current which is then amplified.

http://www.parallax.com/detail.asp?product_id=350-00018

$1.29

http://www.robotroom.com/HBridge.html

Components: TC4421/TC4422

Features High Peak Output Current: 9A Wide Input Supply Voltage Operating Range: 4.5V to 18V High Continuous Output Current: 2A Max Fast Rise and Fall Times:

30 ns with 4,700 pF Load 180 ns with 47,000 pF Load

Short Propagation Delays: 30 ns (typ) Low Supply Current:

With Logic ‘1’ Input: 200 µA (typ) With Logic ‘0’ Input: 55 µA (typ)

Low Output Impedance: 1.4 (typ) Latch-Up Protected: Will Withstand 1.5A Output Reverse Current Input Will Withstand Negative Inputs Up To 5V Pin-Compatible with the TC4420/TC4429 6A MOSFET Driver Space-saving 8-Pin 6x5 DFN Package http://www.microchip.com/stellent/idcplg?

IdcService=SS_GET_PAGE&nodeId=1335&dDocName=en010665

Components: TC4421/TC4422

Components: TC4421/TC4422

Components:Parallax (Futaba) Continuous

Rotation Servo: 900-00008    Technical Specifications

Power 6vdc max Average Speed 60 rpm, Note: with 5vdc and no torque Weight 45.0 grams/1.59oz Torque 3.40 kg-cm/47oz-in Size mm (L x W x H), 40.5x20.0x38.0 Size in (L x W x H), 1.60x.79x1.50 Manual adjustment port www.parallax.com continuous rotation

$6.95 http://www.parallax.com/detail.asp?product_id=900-00008 crservo.pdf

Components:Parallax (Futaba) Continuous

Rotation Servo: 900-00008   

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