After fumbling around with "string on a spool" and BBQ motors, this is the only door actuator type that I trust:
http://www.ebay.de/itm/Motoroffner-Hubmotor-Lichtkuppeln-Da-chfenster-300mm-Hu-b-/181321601925?pt=Fenster&hash=item2a379c1385
Maybe one of the sponsors could order 100 for 7$ each and resell them for a meaningful profit.
http://www.alibaba.com/product-gs/1476968801/bathroom_toilet_plastic_cistern.html
I posted some pics in post 1774 already.
Here are two of my augsburgers using the outside tank.
From the bottom, you see the garden hose, the wires for the water heater and ds1820 temperature sensor and at the top the ultrasound transducer protected with a plastic cover.
This is what I buy in Germany:
http://www.ebay.de/itm/Spulkasten-fur-WC-in-Weiss-mit-Spartaste-6-9-Liter-einfache-Montage-Zubehor-/280875883703?pt=DE_Haus_Garten_Heimwerker_Bad_WC&hash=item416581dcb7
I'm in Bavaria, Germany. Minimal temperature here is -15 Celcius. But i have the water temperature regulated to whatever I want. Currently I have it set to 5 celsuis in the coop and 2.5 Celcius in the run.
Winterized water dispensers
We have two water dispensers; one in the coop and one in the run.
They are constructed from plastic toilet tanks. Plastic toilet tanks have several advantages:
· 1. They have a built-in fill valve that can be connected directly to main water pressure (see...
If you wish to use radio controlled home automation sensors and actuactors in your design, you should check out the busware extension for the raspberry pi.
http://busware.de/tiki-index.php?page=COC
I use ot in my house with a number pf fs-20 devices but it works with many other home automation...