On Thursday, 10 March 2022 08:58:49 EST Thaddeus Waldner wrote: > > But neither of the $23 sensors I bought, actually works. black to -, > > red to 5v, green to dvm on my test table, one rests at nominally 1 > > millivolt, the other at around 27 millivolts which doesn't change > > with the applied pressure. > > What are the sensors? Are they possibly PWM output and need a pull-up? Totally unk Thaddeus, even the amazon pedlars don't know what they are selling.
> They could also be current devices. Check if the current changes with > pressure. Resistances I've measured wih a dvm are in megohms, only if the dvm probes are the correct polarity. Thank you Thaddeus. Cheers, Gene Heskett. -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author, 1940) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
