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Introduction |
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Results |
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Conclusions |
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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
Click figures for larger versions.
Figure 1. MainStateMachine
Figure 2. TakingSampleState
Figure 3. EnterHighScoreState
Figure 4. Circuit diagram
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
| 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 | |
| Power Switch | Lab | 0.00 | ||
| Total: | $19.50 |