Newbie project, to big I guess
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I got so far that I have 1-wire system working with two DS18S20
providing temperatures. Now, controlling a water pump connected to a
Heat exchanger I want to make sure that I keep a certain diff temp
over the inlet and outlet on the primary side. So my program is
caculating the diff temp.
Well, the pump is a 220V and my idea is to have a Diac/Triac
connected to be able to control the speed (read flow).
So, I understand that with a voltage output and a separate OP I can
control the D/Triac and motor speed.
But, any idea for the code for a PI controller.
Any input is appreciated.
Thanks
providing temperatures. Now, controlling a water pump connected to a
Heat exchanger I want to make sure that I keep a certain diff temp
over the inlet and outlet on the primary side. So my program is
caculating the diff temp.
Well, the pump is a 220V and my idea is to have a Diac/Triac
connected to be able to control the speed (read flow).
So, I understand that with a voltage output and a separate OP I can
control the D/Triac and motor speed.
But, any idea for the code for a PI controller.
Any input is appreciated.
Thanks
Comments
text -- I think you'll find it quite helpful.
http://www.parallax.com/dl/docs/books/edu/ic.pdf
-- Jon Williams
-- Applications Engineer, Parallax
-- Dallas Office
Original Message
From: lars505050 [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=hcschiRAriSVRMK6fvgr7piYM0CLW9qmnLomrF1EH2qOyfHEMZuAUMLuG_g-fDQvomduOLO65p_NBQ]ls@l...[/url
Sent: Sunday, February 01, 2004 1:53 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Newbie project, to big I guess
I got so far that I have 1-wire system working with two DS18S20
providing temperatures. Now, controlling a water pump connected to a
Heat exchanger I want to make sure that I keep a certain diff temp
over the inlet and outlet on the primary side. So my program is
caculating the diff temp.
Well, the pump is a 220V and my idea is to have a Diac/Triac
connected to be able to control the speed (read flow).
So, I understand that with a voltage output and a separate OP I can
control the D/Triac and motor speed.
But, any idea for the code for a PI controller.
Any input is appreciated.
Thanks
>I got so far that I have 1-wire system working with two DS18S20
>providing temperatures. Now, controlling a water pump connected to a
>Heat exchanger I want to make sure that I keep a certain diff temp
>over the inlet and outlet on the primary side. So my program is
>caculating the diff temp.
>Well, the pump is a 220V and my idea is to have a Diac/Triac
>connected to be able to control the speed (read flow).
>So, I understand that with a voltage output and a separate OP I can
>control the D/Triac and motor speed.
>But, any idea for the code for a PI controller.
>
>Any input is appreciated.
>
>Thanks
>
>Hmmmm well i am thinking your pump motor is AC and you may find that
controlling the speed
>
a bit difficult . A simple on / off with a solid state relay
will probably be a lot easier . As for flow / volume control
consider two pumps one large one small or solenoid controlled
bypass valves .
Good Luck !!
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