Appendix

Refferences Schematics Code Pictures Parts/Costs


Introduction

High Level Design

Program/Hardware Design

Results
Conclusions
Appendices

Appendices
A: References

Chapweske, Adam. “PS/2 Mouse/Keyboard Protocol.” <http://panda.cs.ndsu.nodak.edu/~achapwes/PICmicro/PS2/ps2.htm>
Health.org. “Alcohol Impairment Chart.” <http://www.health.org/nongovpubs/bac-chart/>

B: Schematic

Click figures for larger versions.

Figure 1. MainStateMachine

Figure 2. TakingSampleState

 

Figure 3. EnterHighScoreState

Figure 4. Circuit diagram

C: Code

Breath-o-Matic.c

D: Pictures

Click each picture to see a full-sized 1760x1168 version.


Alex examines the ill-fated power button


Alex during a bout of intense coding


Dan demonstrates the proper use of the mouthpiece


Dan soberly tests the response of the alcohol sensor


The naked solderboard


A peachy shot of the Breath-o-Matic's pressure chambers


The Breath-o-Matic is Microwave Safe


Welcome to the Breath-o-Matic!


The rewards of depravity

E:Costs and Datasheets

Part# Description Datasheet Source Cost
TGS2620 Alcohol Sensor. 2620.pdf Figaro Sensor 0.00
ina121 Differential Amplifier. ina121.pdf Lab 0.00
LM340T Voltage Regulator LM340.pdf Lab 0.00
MPX2052 Differential pressure sensor MPX2052D.pdf MPJA 4.95
ATmega 32 MCU ATmega32 Atmel 0.00
6Pin Mini DIN Keyboard adaptor   Digikey 0.93
EG1425-ND
Pushbutton Green     1.31
EG1423-ND
Pushbutton Blue     1.31
LCD-98 LCD LCD Allcorp 8.50
  LEDs   Lab 0.00
GF0401M-ND
Speaker   Lab 0.00
  Solderboards   Lab 2.50
2242K-ND
9V battery connector   Lab 0.00
CTX077-ND
Crystal Oscillator   Lab 0.00
      Total: $19.50