Laser Shoot-Out Game By Steven Noto and Laura Miller Advisor: Steven Gutschlag April 4, 2000 Senior Project Status Report 2

Presentation Outline u Project Overview u Project Progress u Laser System Overview u Review of Completed Work –Software –Hardware u Schedule u Conclusion

Block Diagram

Project Progress u Work almost complete on Weapon hardware and software u Laser transmission and reception system has taken longer than expected

Laser Transmission System

Software Progress I u Weapon Software Objectives –Laser Interface v Serially send out data to be transmitted v Serially receive data from laser receiver –User Interface v Trigger, Reset, etc. –RF Interface

Software Progress II u Weapon Software Progress –Originally written in C and Assembly v Many problems integrating the two languages –Transferred to all C code v All assembly problems solved with only a small reduction in speed

Software Progress III u Weapon Software Status –User Interface v All buttons connected and tested –Laser Interface v Software components of transmission simulate correctly –RF Interface v Serial interface will be used instead

Future Software Milestones u Making sure the transmission software works with the hardware u Using the serial interface u Moving on to Display Board and Central Controller software

Weapon

Hardware Accomplishments u Reduced noise in laser receiver circuit –Added decoupling capacitors –Tried different oscilloscopes and different settings –Tried different feedback resistors

Hardware Accomplishments u Amplifier stage is operational –Designed and built –Problems with instabilities - Added Capacitors in parallel with feedback resistor –Problems with the first stage output voltage level saturating the second stage

Current Laser Receiver Output

Future Hardware Milestones u Laser receiver amplification –Change the gain on the current amplifier circuit u OOK detection circuit –Chip is already selected u OOK circuit –An oscillator and switch

Original Spring Schedule Week LauraSteven 1 Design and optimize laser receiver Code weapon software 2 Design and optimize laser receiver Code weapon software 3 Design and optimize laser receiver Code weapon - to - display Software 4 Integrate laser receiver and weapon software 5 Integrate laser receiver and weapon software 6 Design C.C. electronics Code C.C. - to - display software 7a Design display board electronics Code C.C. - to - display software 7bMid-term demonstration 8 Design display board electronics Code C.C. - to - display software 9 Design display board electronics Code display - to - user software 10 Integrate C.C. hardware and software 11 Integrate display hardware and software 12 Integrate Subsystems 13 Integrate Subsystems 14 Presentation

Actual Spring Schedule Week LauraSteven 1Reviewed Specs for Photo Diode, Learn to use Keil PK51 Package Looked at Current to voltage Converter 2Set up simulation for I to V converter Learn to use Keil PK51 Package 3Finished simulations for both I to Begin coding weapon software V converters and started building circuits 4Finish building circuits and test themInterface weapon software and laser systems

Actual Spring Schedule Week LauraSteven 5 Trouble shooting laser receiver Analyzing timing for weapon software, circuit and noise reduction running MMT test programs 6 Recorded frequency response Coding and simulating assembly of receiver circuit, worked oncode for laser interface noise problem 7 Started amplifier design,Incorporating assembly and C, finished testing receiver circuit running test programs on MMT peripherals 8 Designed and built amplifier Incorporating assembly and C circuit 9 Finished wiring amplify circuits,Switching all weapon software to C Fixed several problems with themcode, simulating weapon code

Conclusion u Software - Working on weapon software u Hardware - Working on laser receiver for the weapon u Many challenges to overcome to finish weapon

Questions?