Search found 4 matches

by Boards14
Fri Feb 19, 2016 8:23 am
Forum: USB DrDAQ
Topic: pH output to control pump
Replies: 6
Views: 24189

Re: pH output to control pump

Thank you all for your help but I've got a satisfactory solution now using a simple feedback loop triggering a higher voltage relay to run the little peristaltic pumps and with a 5 second delay for the alarm I get suitable precision.

Yours
Dan
by Boards14
Fri Jan 08, 2016 12:08 pm
Forum: USB DrDAQ
Topic: pH output to control pump
Replies: 6
Views: 24189

Re: pH output to control pump

I think i'll stick to the relay to start with, with a variable power pack to control the pump speed.

Thank you for all the help.

Dan
by Boards14
Thu Jan 07, 2016 2:53 pm
Forum: USB DrDAQ
Topic: pH output to control pump
Replies: 6
Views: 24189

Re: pH output to control pump

Thanks Andrew, so it's just limited to on/off? And then with a transistor or relay I should be able to power a pump once it hits a threshold. Should do the job :)

Cheers
Dan
by Boards14
Tue Jan 05, 2016 3:41 pm
Forum: USB DrDAQ
Topic: pH output to control pump
Replies: 6
Views: 24189

pH output to control pump

Hello I'm trying to use the output from the pH probe on the DrDAQ, (I can output values to excel) but want to turn a pump on when the pH exceeds a set value? Is there software available (old threads i saw were from 2004 so i'm hoping something exists since then...)? or some info on using the output ...