glenn property of pam
Commander
- Joined
- Feb 17, 2012
- Messages
- 2,906
my wife decided to buy some quail for the aviary to clean up the seed that's spilt on the floor. She purchased a small plastic container with a 7watt light bulb for a incubator. The light is annoying in the house at night time while watching tv and theres no control to the light so its time for a overkill project that's basically a way to learn something new, spend more money than its worth and make something simple as complicated as possible.
so far I found a old 8 bottle wine cooler and I have reversed the cooling unit so I can het the inside of the cooler using the heat off the back of the peltier ceramic. I reversed the whole unit as the hot heat sink was larger than the cold rather than just reversing the voltage.
The next problem was the thermal controls on the wine cooler wouldn't allow a setting as high as 99.5 so I tried a adjustable industrial heat switch which worked but it was designed for 120v so I had to use a relay as im cutting power to the peltier not the control board. The switch would shut off at 99.5 but it would rattle the relay until the temp had over run slightly. The buzzing scared the wife as the relay rattled so that was a fail. (learn something: the theory works, The heater can reach temp, The cold side is not going to get real cold and cause condensation issues, the switch is not going to work, The heat sink has stored thermal energy which will cause overrun.
Upgraded switch to a digital rtd thermal control relay. This held the temp with in 1.4 degrees. After some research (read the manual) I allowed fussy logic on the relay which records the over and under run then adjusts the controller to shut down early and start early. Now the temp is held with in 0.4 degrees.
Next step is: Arduino controller so I can not only control temp but humidity, alarms, fans, egg turner, etc. I know a few people on here have played with this type of hardware so im sure when I get stuck I can ask for a hand
so far I found a old 8 bottle wine cooler and I have reversed the cooling unit so I can het the inside of the cooler using the heat off the back of the peltier ceramic. I reversed the whole unit as the hot heat sink was larger than the cold rather than just reversing the voltage.
The next problem was the thermal controls on the wine cooler wouldn't allow a setting as high as 99.5 so I tried a adjustable industrial heat switch which worked but it was designed for 120v so I had to use a relay as im cutting power to the peltier not the control board. The switch would shut off at 99.5 but it would rattle the relay until the temp had over run slightly. The buzzing scared the wife as the relay rattled so that was a fail. (learn something: the theory works, The heater can reach temp, The cold side is not going to get real cold and cause condensation issues, the switch is not going to work, The heat sink has stored thermal energy which will cause overrun.
Upgraded switch to a digital rtd thermal control relay. This held the temp with in 1.4 degrees. After some research (read the manual) I allowed fussy logic on the relay which records the over and under run then adjusts the controller to shut down early and start early. Now the temp is held with in 0.4 degrees.
Next step is: Arduino controller so I can not only control temp but humidity, alarms, fans, egg turner, etc. I know a few people on here have played with this type of hardware so im sure when I get stuck I can ask for a hand