CPU
The CPU is what runs the Code assets in your gadget to control all your gadget's modules.
Sizes
The different CPU sizes support different amounts of EventChannels at once.
The small CPU can have up to 4 EventChannels.
The medium CPU can have up to 16 EventChannels.
The large CPU can have up to 64 EventChannels.
Aside from that, the different CPU sizes do not operate differently.
Properties
The code asset uploaded to the CPU.
The time since the gadget is turned on, expressed in seconds.
The time elapsed since the last tick, expressed in seconds.
A table which is used to connect each Event Channel with a module in your gadget that can trigger that channel with its events.
In the Multitool
You can set the Source and EventChannels properties from the Multitool while editing your gadget to set these values without using code.