First, build a Circuit Fabricator. Then use the following recipe:
- 1 Redstone Torch as its main ingredient, which has to be placed in a top right slot.
- 2 Raw Silicon
- 1 Diamond
- 1 Redstone dust
If you are playing in survival you can build yourself a Coal Generator as a basic power source (in creative you can use a Battery, solar panels, etc.). You can connect the generator with the Circuit Fabricator by using Aluminum Wire.