G
gdon
- Jan 1, 1970
- 0
I am a humidor builder looking to add active humidification to my larger
models. These models range from around 6 cubic feet to as large as 18. In
smaller models, I use a passive humidification system which uses a 50/50
solution of propylene glycol/distilled water. This does not work well in
large models because they dry out too fast.
What I want to design is a small device to measure humidity and activate a
small 40mm fan if the relative humidity drops below 66%, and turn off the
fan when RH exceeds 70%. The accuracy of the device should be +/-2%. The
fan will pass air over a wicking fiber which is attached to a distilled
water reservoir.
I am aware of the various humidity sensors available as indicated in other
threads:
http://www.digikey.com/scripts/us/dksus.dll?Criteria?Ref=141335&Cat=32375562
But the part that I need help with is the circuit design. I am a newbie!
I was hoping that somebody could point me in the right direction? Any tips
or links are very much appreciated.
Greg
models. These models range from around 6 cubic feet to as large as 18. In
smaller models, I use a passive humidification system which uses a 50/50
solution of propylene glycol/distilled water. This does not work well in
large models because they dry out too fast.
What I want to design is a small device to measure humidity and activate a
small 40mm fan if the relative humidity drops below 66%, and turn off the
fan when RH exceeds 70%. The accuracy of the device should be +/-2%. The
fan will pass air over a wicking fiber which is attached to a distilled
water reservoir.
I am aware of the various humidity sensors available as indicated in other
threads:
http://www.digikey.com/scripts/us/dksus.dll?Criteria?Ref=141335&Cat=32375562
But the part that I need help with is the circuit design. I am a newbie!
I was hoping that somebody could point me in the right direction? Any tips
or links are very much appreciated.
Greg
