//Digital Pin 2 is the Output PIn from Arduino to Mosfet to turn on Relay for Pumps int trigger= A0; //Analog input pin to determine if pump needs to be on #define Psignal 2 // GPIO TO turn pump on ...
place. If you're using a 3.3V microcontroller then use a 3.3V power source, if you're using a 5V microcontroller then use a 5V souce. Take care to not BURN OUT your digital I/O. start = true; // Power ...
Runner and Arduino enthusiast Nikodem Bartnik has created a DIY 100m sprint timer which is placed at the finish line and signals the start of timing via an audible bleep from its integrated speaker.
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