Simple file to facilitate planning of 8×8 LED matrix on MAXIM MAX7219 controlled 8×8 LED display module.
There each 8×8 range simiulate LED matrix. Cells with value 1 are “switched on” – red, and cells with 0 are switched off (background color as applied by the user for whole range).
Switching on/off cells can be done manually, or if you have macros enabled, just by selecting a cell or a range in rows 28:35. Also (as once a cell is selected, it can be selected again only after some other cell or other object was selected), similar action occurs after double click. Two simple event handler procedures (located in a worksheet code) are responsible for that. See the Arduino setup + code and watch it working on YouTube.