Puls input

by Sven Rombouts on Tue, 17/01/2012 - 08:43

Hi everybody,

I just install a IFM magnetic sensor to count my water (with led) so I can
see good the pulse of the signal.

Know someone, that the input of the flusko meter count on negative and positive signal ?

Thanks,
Sven

Amedee | Fri, 20/01/2012 - 11:07

It is an 'open collector' input.

The meter 'sees' a pulse when the '+' sensor pin goes from High to Low.
(E.g. when you short the '+' and the '-')

icarus75 | Thu, 26/01/2012 - 13:50

Correct. There's a internal 20-30k pull-up resistor present on the + of the input. Shorting + and - will pull down the +. There's an edge-triggered high-to-low interrupt configured on the +.

Cheers,
Bart.