Marcus_in_the-Darkus
Active Member
I'm going to need to set up an active negative-pressure ventilation system in my tent pretty soon when I go to flower. The tent is currently passively ventilated, meaning that I simply direct a clip-on fan at a partially opened vent at the top of the tent and air exchanges occur at a sufficient rate. But it's starting to get stinky! 
This is my first grow and, based on my reading and lurking here at RIU I built my own 300W COB light, and will add a second one in a week or so when I go to 12/12. I mounted the LED drivers externally because one of my design objectives was to minimize the amount of heat that needs to be removed from the tent, which allows me to run a small blower. Because my tent is in my basement and will exhaust into a chimney, the more ventilation air I draw air into the basement during summer the more of a humidity problem I'm going to have down there. I bought the iPower 4" 190 cfm blower and carbon filter on Amazon and also the speed controller for the unit but it moves way more air than I need and it's even noisier when I use the speed controller to slow it down. What I'd like to do here is to take my first step into the world of automation and controls by using arduino to monitor temperature and humidity and control the fan speed accordingly. Later I'd like to switch from my DWC system to ebb/flood and use arduino to control the pumps and monitor the reservoir chemistry and temperature. I'm not an electrical engineer, but I do mess around with radio control airplanes and I think a multi-phase brushless motor and an electronic speed controller would be the way to go to control airflow.
Looking around for 12V or 24V blowers led me to marine bilge blowers like this 130 cfm model:
(OK, the forum won't let me post a link yet because I'm a new user, but just Google "Seaflo 01 Series Flange/Flex Mount Bilge Blower 130 CFM")
Looking at the description in the link it appears as if it simply has two electrical leads, positive and negative DC without the third wire to the ESC like my RC electric motors have. So my question is can this motor be controlled with an ESC that I could buy from a hobby shop? Is there a better solution?
Thanks in advance for your help.
This is my first grow and, based on my reading and lurking here at RIU I built my own 300W COB light, and will add a second one in a week or so when I go to 12/12. I mounted the LED drivers externally because one of my design objectives was to minimize the amount of heat that needs to be removed from the tent, which allows me to run a small blower. Because my tent is in my basement and will exhaust into a chimney, the more ventilation air I draw air into the basement during summer the more of a humidity problem I'm going to have down there. I bought the iPower 4" 190 cfm blower and carbon filter on Amazon and also the speed controller for the unit but it moves way more air than I need and it's even noisier when I use the speed controller to slow it down. What I'd like to do here is to take my first step into the world of automation and controls by using arduino to monitor temperature and humidity and control the fan speed accordingly. Later I'd like to switch from my DWC system to ebb/flood and use arduino to control the pumps and monitor the reservoir chemistry and temperature. I'm not an electrical engineer, but I do mess around with radio control airplanes and I think a multi-phase brushless motor and an electronic speed controller would be the way to go to control airflow.
Looking around for 12V or 24V blowers led me to marine bilge blowers like this 130 cfm model:
(OK, the forum won't let me post a link yet because I'm a new user, but just Google "Seaflo 01 Series Flange/Flex Mount Bilge Blower 130 CFM")
Looking at the description in the link it appears as if it simply has two electrical leads, positive and negative DC without the third wire to the ESC like my RC electric motors have. So my question is can this motor be controlled with an ESC that I could buy from a hobby shop? Is there a better solution?
Thanks in advance for your help.