Giovanni designed an Alcohol breathalyser [machine translation] using only an 8 pin PIC12F683 microcontroller, the MQ-3 alcohol gas sensor, and a 30 bar-graph breakout.
Tag Archives: alcohol
DIY rosin solder flux made with isopropyl alcohol
Arhi tried his hand making DIY rosin-based solder flux. He added crushed rosin to isopropyl alcohol until it had the desired viscosity. The video is a test of the new flux on 1 mm and 0.5 mm pitch components. By his account it works better then some commercial products, but there’s also more smoke and […]
Arduino + MQ3 = alcohol breath tester
This the season for good cheer, and what can be more cheerful than a project that’s as much fun to use as it is to build? How about a homebrew alcohol breath tester? Daniel Andrade shows how to build just such a device using just an Arduino, MQ3 alcohol sensor and a handful of resistors […]