Now that you know what exactly you will be building, the size and dimensions, the next step is to decide on what exactly you need to build it.
You need to create a list of parts that you will be using in the project and state if you already have them, what you need from me and what you can make. Then have a picture with all the parts labeled, so you know you have everything. Please note the numbers in the list match the corresponding number part in the picture. Please make sure your picture resembles you item. I have an outside and inside view to help.
Example:
Title: Raspberry Pi GameBoys
Group: I am a group of 1
Part List:
many x wires - CAT5 cable Mr Coxall has
2 x plastic case - 3D printed
7 x plastic buttons - 3D printed
4 + 20 screws - Mr. Coxall has some
1 x raspberry Pi 3B+ - already have
1 x 4" HDMI screen - Mr. Coxall has one
1 x flat flexible HDMI cable - Mr. Coxall has one
2 x 18650 batteries - already have
1 x PiCade HAT - need to get
2 x 8 ohm speakers - need to get
1 x 1000 power boost - already have
2 x perf boards - Mr. Coxall has them
12 x push buttons - Mr. Coxall has them
2 x Micro USB male connectors - need to get