Block diagram of this slide show projector, followed. First, get a breath from a user with a Breath sensor, which in this case is used as a Gas sensor TGS 2620 to breath as DC voltage. Then, the signal received from the Breath sensor to processing by the microcontroller attiny45 and last used by this. When the process successfully, thereby rendering the results include measures the alcohol level in units of ppm, and the decision to open or not to open a bottle, via the 7-segment and switch controller, respectively.
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