Project of Cell Fone Link With a Remote Control Robort

by **waqas** on Fri Jun 24, 2011 8:41 am

Table of Contents
Abstract.......................................... ........ 2
Table of Contents...................................... 3
Table of Figures ..................................... 4
Introduction...................................... ........... 5
Objective ........................................... 5
Specifications.................................... .......... 6
Design ............................................ 7
Transmitter (Richard)..................................... 9
Approach to solution.................................... 9
Establishing a Control Signal through the Cell Phones (Michael) ................. 11
Received Signal (Michael)............................. 13
Filtering of the Received Signal ........................ 13
High-Pass Filter ......................................... 14
Low-Pass Filter ............................ 16
Speed Control System (Raj)................ 17
Comparator Circuit ............................. 18
Microcontroller Circuit ............................. 18
Control Circuit ................................... 22
H-Bridge and Rear Motor .................................... 22
Steering Control System (Justin) ................... 23
Reverse Engineering ........................... 23
Solution:......................................... ...... 24
PIC Program.......................................... 25
H-Bridge ................................ 25
Power (Justin) .............................. 26
Results and Conclusions ..................................... 27
References........................................ ........ 28
APPENDIX A................................................. .... 29
APPENDIX B.......................................... 40
APPENDIX C........................................... 43
APPENDIX D............................................. 47
APPENDIX E ......................... 60
APPENDIX F.......................................... 62
APPENDIX G........................................... 67
APPENDIX H........................................... 82
Table of Figures
Figure 1 - Project Idea. ............................ 5
Figure 2 - Block Diagram ......................... 8
Figure 3 – Control Signal to Phone Connection ................... 11
Figure 4 - Speed Control Logic ..................................... 17
Table 1 - Frequency Vs Duty Cycle. .......................... 20
Figure 5 - Duty Cycle Vs Frequency ............... 20
Figure 6 - Duty Cycle Vs Count ................................. 21
Table 2 - Control Bit Value and Pulses ........................... 22
Figure 7 - Diagram of Steering system................ 23
Figure A.1 – Transmitter Block Diagram.............................. 30
Figure A.2 – Preliminary Design for a Sine Wave Generator (Not Used in Final Design) ......... 30
Figure A.3 – Second Preliminary Design for Sine Wave Generator ............................................ 30
Figure A.4 – Pseudo Sine Wave Generator (Used in Final Design).......... 31
Figure A.5 – Output of One Pseudo Sine Wave Generator (High Frequency Channel) .............. 31
Figure A.6 – Voltage Divider and Operational Amplifier Buffer ........... 31
Figure A.7 – Summing Amplifier................ 32
Figure A.8 – Control Signal Generator (Transmitter) Schematic............ 32
Figure A.9 – Comparator Circuit................. 33
Figure A.10 - Low-to-High Transition Interrupts................ 33
Figure A.11 - Flow Chart for Acquiring Number of Counts from Timer upon
Interrupts........... 33
Figure A.12 - Servo Motors Control Circuit............ 34
Figure A.13 – UAF42A Universal Active Filter IC Circuit Diagram ........ 34
Figure A.14 – UAF42A Typical Application Circuit .......... 34
Figure A.15 – Actual High-Pass (Band-Pass) Filter Frequency
Response................................... 35
Figure A.16 – Maxim MAX291 8th Order Low-Pass Filter Typical Circuit ................................ 35
Figure A.17 – Low-Pass Filter Actual Frequency Response Plot ................................................ 35
Figure A.18 – Theoretical Low-Pass Filter Response From MAX291 Datasheet[2]................... 36
Figure A.19 – Generated Final Control Signal .................................................. ........................... 36
Figure A.20 – Signal Generated (Top) and Signal Received ...... 37
Figure A.21 – Latency of about 300ms between the Signal Generated and Signal Received...... 37
Figure A.22 - Receiver Board................... 38
Figure A.23 - ADC Setup ...................... 39
Figure B.1 – Joystick and Signal Generator Box............. 41
Figure B.2 – Female Two Pin Headset Cord to Circuit Connector ..... 41
Figure B.4 - A Typical Servo Motor....................... 42
Figure C.1 – Band-Pass Filter with center frequency of 2.2 kHz................ 44
Figure C.2 – Program Indicates Nearly -3dB Attenuation at Low Cut-off Frequency ...... 44
Figure C.3 – Program Indicates Nearly -3dB Attenuation at High Cut-off
Frequency...... 45
Figure C.4 – Resistance Values for Use with Figure A.15 to Build Filter .... 45
Figure C.5 – Cascade Layout to Obtain a 4th Order Filter Using Two UAF42As ... 46
Figure C.6 – Theoretical High-Pass Filter Frequency Response..... 46
Figure E.1: Budget.................... 61

by **waqas** on Fri Jun 24, 2011 8:42 am

If anyone have any info then please post here!

Project of Cell Fone Link With a Remote Control Robort

Project of Cell Fone Link With a Remote Control Robort

Re: Project of Cell Fone Link With a Remote Control Robort