BMP-180 is a compact and cheap Digital Barometric Pressure Sensor. Below is an image of the breakout board commonly available on ebay There is some confusing information about the required voltage, so safest would be to go with 3.3v. As per datasheet (download here) from Bosch, the chip manufacturer, the max voltage is 3.6v It… Continue reading BMP-180 Digital Barometric Pressure Sensor