I tested my setup with a 6F22 9-V battery-powered Arduino and a regulated 5-V “breadboard power supply module” powered sensor circuitry, each sharing a common ground (0-V) rail. Note that during the ...

The sensor is connected to one of the analog inputs of an Arduino, which also runs a 128×64 pixel LCD display — inspired by this air quality meter — to show the current smokiness both ...

8: Arduino Water Level Indicator Here is a tested Arduino project that uses 3 sensor probes as water level indicator with 3 leds and one LCD display + a simple controller that turns on a motor when ...