- Category: Ciseco product documentation
- Last Updated on Monday, 24 December 2012 11:12
How to build
The LED matrix shield is supplied as a kit containing a PCB, 8 resistors, 4 sets of header pins, switch and 8x8 LED matrix. Assembly is quite straightforward for anyone with moderate soldering experience. If you are new to soldering, or need to brush up on your skills, there are lots of tutorial videos on YouTube and other websites.
Start with the 8 resistors. The markings on the board show where they go. They are all identical, and can be fitted either way around. For neatness, though, we suggest mounting them all in the same direction. Bend the legs at 90' before inserting them in to the board, and solder them in place one at a time. Next mount the switch. This will 'click' in to place on the PCB ready to be soldered. The LED matrix must be orientated so that the writing on the edge is the same way around as the writing on the PCB. Push it firmly through and solder in place. All excess leads from resistors and matrix should be trimmed with a pair of side-cutters.
To ensure the pins line up with your Arduino or Xino, insert the long ends in to the Arduino first and put the PCB on top before soldering the top of the board.
Aditional hardware may be wired up to digital pins 0 & 1 and anallog pins 0 & 1 via the solder pads next to the pins. You could, if you wished, solder pins or sockets here to allow things to be added or removed as required.
LED matrix physical pinout
The following code assumes two variable resistors have been wired to A0 and A1 as per this example; http://arduino.cc/en/Tutorial/RowColumnScanning and allows you to move a single dot around the screen with the two pots;