Step 2Optional Extras
If that is all you require, then great. Some people want more.
One option with the current PCB is for a Power LED. An LED can be installed on your stick, or even directly onto the UPCB itself, and will glow whenever the stick is getting power (i.e. it's connected to a console). We'll call this is "Power LED option". Other than about 20mA of extra power draw, this option has no affect on the operation of the UPCB. Take it or leave it as you like.
The second option is for an additional button, reserved specifically for UPCB settings and options. It's a button that is not connected to the game console at all, and would normally be used for such things as recording and playback of programmed moves. We'll call this the 'Programming Button Option'. As of this writing, the Programming Button Option has not been implemented in the UPCB source code, but is expected soon.
There are two I/O lines left, and they are usually treated as a pair. These two lines can be used for inputs using a button, or outputs using LEDs. If the main 6 buttons are enough for you, and you like flashy lights, then go with the 'Extra 2 LEDs Option'. If you'd rather have the two additional buttons be for play next to the six main play buttons, go with the 'Extra 2 button Option'. If you don't really care for extra LEDs or extra Buttons, just ignore them both.
Keep in mind or write down which options, if any, you want to incorporate when you build the UPCB.
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