Before we can a-blinkin' there's a little soldering to be done. This step will attach the 2x20 socket header so that we can plug this HAT into a Raspberry Pi, the 2x8 header so we can plug the RGB matrix into the HAT, and a terminal block so you can power the matrix through the HAT.
Start by plugging the 2x20 header into a Raspberry Pi, this will keep the header stable while you solder. Make sure the Pi is powered off!
Heat up your iron and solder in one header connection on the right.
Once it is soldered, put down the solder and reheat the solder point with your iron while straightening the HAT so it isn't leaning down
(For tips on soldering, be sure to check out our Guide to Excellent Soldering).
Check over your work so far, make sure each solder point is shiny, and isn't bridged or dull or cracked
Next up we will attach the 2x8 IDC header. Unlike the 2x20 header, this connector has a direction!
Notice in the middle there's an outline for the connector in the middle. On the right it says HUB75 and on the left of the connector there is a little 'cutout' shape. This cutout shape must match up with the cut out on the connector.
If you solder it in backwards, its not a huge deal, you can use diagonal cutters to cut out a notch on the opposite side, but if you get it right then you will never have to worry about plugging in your matrix data cable the wrong way