Thread: Power Drain Sensor

ok from me it was [Vnominal - 2.5] X 25 and i can read the rigth value now.

BUT it takes 6-8 secs to read the end value on the text label. I mean i can see the amperage increasing on the text label to the maximum (rigth) value (while i can see the end value on the multimeter) and it takes up to 8 secs.

is it normal?

Panos

that might be auto your "auto averaging" setting. It's a property of the input. and it's proabably set too high. I'd try setting it to false for now, or taking the value to 0 or really low.

yes you are rigth, but without averaging i have values changing +- 100mah.

I understand that i have to find an acceptable balance with some trials.

thanks agn.

Originally Posted by sv1cox

yes you are rigth, but without averaging i have values changing +- 100mah.

I understand that i have to find an acceptable balance with some trials.

thanks agn.

this is because you are using the sensor to measure such a small load. electrical noise is picked up, as it only takes 0.005 volts of noise to register as 100ma.

Originally Posted by sv1cox

ok from me it was [Vnominal - 2.5] X 25 and i can read the rigth value now.

BUT it takes 6-8 secs to read the end value on the text label. I mean i can see the amperage increasing on the text label to the maximum (rigth) value (while i can see the end value on the multimeter) and it takes up to 8 secs.

is it normal?

Panos

Yup, that is auto-averaging. You have it set to 50 from your above screenshots, which means when it changes, only 1 of 50 values changes and are averaged together, making a smooth jump. Set it to 0, and any little noise it will rattle around constantly.

I suggest auto-average of 4 to 8 should do the trick, but you may need to play to get it perfect.

As to port8 = pin9, the software is all 0-index based. Meaning there is no port 10 and there is no pin 10. So the 1st port which is port 0 goes to the 1st pin which is pin 0.

..and port 8 should be pin 7... ehm... confused but its ok no problem to find a port/pin comb that works.

thanks

Panos

Originally Posted by sv1cox

..and port 8 should be pin 7... ehm... confused but its ok no problem to find a port/pin comb that works.

thanks

Panos

Basically just think of it like this... When you count, start at zero. So 0,1,2,3,4,5,6,7,8,9. That is 10 numbers, but 0-index based.