mmechtley:
Alcoscan AL2500 Breathalyzer
mmechtley:
Board, back. Simple AVR microcontroller with sensor as an analog input and LCD as digital outputs
mmechtley:
Board, front. Note the connectors for the LCD, which are nice and big
mmechtley:
Mapping out which pins control which LCD segments
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Pin cross reference for AVR microcontroller and LCD
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Test wire ("Wait" indicator) connected to Arduino
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You only need to observe five segments of a seven-segment display to know which number is displayed
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Soldering more wires - first digit done
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Soldering more wires - first digit done
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Completed breathalyzer to arduino interface
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Waiting for the player to use the breathalyzer
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Playing while not drunk
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Playing with Player 1 significantly drunk