HOw to detect the flow of water through a pipe

[woodc]

I really do appreciate you taking the time to do this    My coding skills are weak and this will give me a great opportunity to dissect known-good code in an attempt to better understand.

Cheers

[woodc]

I am not sure how I am messing this up 

The code seems to run fine but the only thing that increments is Tu

I confirmed the connection to pin 4 has 5V on it and even pulled it out/stuck it back in several times to replicate pulses...nada

Is there some dependency on the lightning code I am missing?

[pantonvich]

stop before you damage your input pin - forget my code and the meter

start here!

http://www.ladyada.net/learn/arduino/lesson5.html

after you master lesson5

you need to wire the meter up like a switch with a resistor

[woodc]

The pin is set as an input, the only source of voltage is from the Arduino itself (5V) and pins are rated for 5V so...no need for alarm (or for a resistor) right?

[pantonvich]

Current is the issue

Use a 10k to protect

Also try a zero valve for the denounce to see if that's the issue

[woodc]

Using a 10k pulldown resistor to ground along with the blue wire and red (connected directly to 5 volts) worked like a champ with the code provided previously by pantonvich 

[pantonvich]

that's great!