The Little Acre

To get the generator working will take a few easy steps.

1: Head outside and to the letterbox and collect the mail. You will get a small crystal.
2: Once back inside, grab the silver/grey jug to the right of the fireplace. Then leave the house via the door to the right of the screen.
3: Walk right to the red pump. Use Empty Jug with Pump, then press which breaks the handle off.
4: Use the broken handle on the Shed Door and enter the shed.
5: Pick up the Pitchfork and head back outside.
6: Use the Pitchfork with the Stump, then use it with the Pump to get Water.
7: Return to your Father's bedroom and make sure to close the blind, for which their is a related achievement, and press with the Generator console in his bedroom.
8: Put the Crystal in the slot, then Water in the Funnel. To the right are 2 dials. Turn the Ohm (top dial) to 4, and then the other dial to 3.
9: The ultra violet lights will turn on. Press to back out momentarily, and you will see a pattern of circles you can interact with. You will now need to use this pattern with the 4x4 grid of buttons on the right of the console.

Now the generator is working and you should have your achievement.

A video with the solution.