I made this automatic coffee maker a few years ago, and now I am finally writing an article about this project.
Here is a picture of my current setup. The top has the power strip. I use this to turn on and off the coffee maker and the timer at the same time.
Here is a picture of the water hose from my RO water filter to a shut off valve. This valve is here if I need to replace the solenoid, or there is a leak.
After that the hose goes into the solenoid, then to the coffee maker.
Here is the timer. I set the seconds I want the water to flow for. I set mine to 50 seconds for about 8 cups of coffee.
For my connections on the back of the timer. I removed the pins from a computer power supply connector. Then used those with heat shrink on them to connect the pins on the back of the timer.
The solenoid I used is a water solenoid with 1/4″ adapters added.
See a video of it in action!
Where to Find the Parts: