Temperature control - Electronic Circuits Projects Diagrams Free

Power-U · 18th March 2003, 05:31 PM

Anyone know any ciruits or any web pages that has cirduits for a green house temperature control ciruit.

Chippie · 18th March 2003, 06:48 PM

What sort of control do you want ? simple on-off control of a heater or full PID ?

What size heater ?

Gene · 18th March 2003, 09:45 PM

If the idea is to turn on an exhaust fan when the temperature rises in the greenhouse, you might want to check out your local hardware store. They sell a bi-metal contact in a 1/2" x 2" case. When the temp rises, the two metal strips contact and hold until the temp falls 10 degrees F. The "turn-on" temperature is adjustable from 95 - 120 degrees F. They are made for attic fans, cost under $5, and will handle a couple of Amps.

Power-U · 19th March 2003, 08:05 PM

The simple on/off control.

bogdanfirst · 20th March 2003, 07:01 AM

so you need something so that when the tempersture resches a certain value you will have a fant turned on and when it drops to certain value the fan will stop. or use a heater instead to make hotter?

**kinjalgp** · 20th March 2003, 12:35 PM

Try these:
http://chattanooga.net/~cdp/fridgctr/fridgctr.htm
http://www.geocities.com/ido_bartana...controller.htm
http://hbd.org/mtippin/tempcontschem.html

Search google for "Temperature Controller Schematic" if you want more.

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18th March 2003, 05:31 PM	(permalink)
Power-U	Temperature control Anyone know any ciruits or any web pages that has cirduits for a green house temperature control ciruit.

18th March 2003, 06:48 PM	(permalink)
Chippie	What sort of control do you want ? simple on-off control of a heater or full PID ? What size heater ?

18th March 2003, 09:45 PM	(permalink)
Gene	If the idea is to turn on an exhaust fan when the temperature rises in the greenhouse, you might want to check out your local hardware store. They sell a bi-metal contact in a 1/2" x 2" case. When the temp rises, the two metal strips contact and hold until the temp falls 10 degrees F. The "turn-on" temperature is adjustable from 95 - 120 degrees F. They are made for attic fans, cost under $5, and will handle a couple of Amps.

19th March 2003, 08:05 PM	(permalink)
Power-U	The simple on/off control.

20th March 2003, 07:01 AM	(permalink)
bogdanfirst	so you need something so that when the tempersture resches a certain value you will have a fant turned on and when it drops to certain value the fan will stop. or use a heater instead to make hotter?

20th March 2003, 12:35 PM	(permalink)
kinjalgp	Try these: http://chattanooga.net/~cdp/fridgctr/fridgctr.htm http://www.geocities.com/ido_bartana...controller.htm http://hbd.org/mtippin/tempcontschem.html Search google for "Temperature Controller Schematic" if you want more. __________________ "There is no way to peace, peace is the way!"