automatic coop door (power a 5 volt drill to open and close door based on sun rise sun set.)
You will need either a darlinton pair transistor or a relay to power the motor. Make sure you also use a separate power supply. You will also need to let the arduino know when sun rise and sun set is, so a RTC
will be needed. You can also get the one that is shown in this library. DS1302 time library
Turn heat lamp on based on temp in the coop
Turn fan on based on temp in coop
This will of course need a temperature sensor and if you do a search for Arduino temperature sensor, you will find a lot on them and some code you can play with.
Turn a light on and off daily
This can go with the RTC used for detecting sun rise and sun set, you will just need to tell it to turn on and off at different intervals. Many RTC examples can be found with a quick search on the forum or google.
Have a display with temperature of coop.
You could get a small 16x2 LCD screen, which does have a library in the Arduino Playground/liquidCrystal
. If you are low on usable pins, you may want to get a I2C 16x2 LCD instead.
power indicator lights on out side of coop for the following:
This is simple enough, but depending on the lights used, you may need transistors or a relay.
-low water (float switch)
-Door Open (limit switch)
These too should be very simple to do, and there may even be a water level sensor other than a float switch, that you can use.