Editing Step 6 —
Prep for Bootloader Upload

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Connect your Arduino Uno's ICSP pins to the main electronics board (Melzi board) of the printer like the picture.

If you hold the Melzi and the Uno as shown in the photo, you can line up the pins as you see them: Top right→ top left. Bottom right → Bottom right.

The one exception is the RESET pin, on the top left of the Melzi board. It goes to digital pin 10 on the Uno.

Here's a photo that shows the pin mapping. Note that it isn't with an Uno, but it's the same thing.

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