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Multiple Pulse Reader Hat

Posted: Tue Jan 16, 2018 7:38 am
by bradhnz
Is there a hat available as I need to read 3 water pulse meters which will then send a csv file back to a server.

Any help apreciated

Re: Multiple Pulse Reader Hat

Posted: Thu Apr 12, 2018 3:15 am
by Brucepet
You can go direct into the GPIO, will need to use hardware or software pull ups, or if the water meters output a voltage pulse you may need to reduce it to 3.3 volts max. I am using a pi on my boat which monitors (among a host of other stuff) two engine tachos. The tacho pickups are magnet/hall effect sensors, they output a pulse per revolution. I use interrupts to time each pulse. I see no reason this wouldn’t work for three pulse inputs. See for ideas on programming.