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Working on creating a pcb for a blinky board that blinks LEDs in a variable speed sequence. I want to make the blinkey board heart shaped and valentines themed. For my first steps, I followed instructions from a model project from STASIS hack club to design the schematic for the pcb. I was a bit confused on what some of the wiring meant, and I watched a video, prior to starting the schematic, on how a 555 timer is structured and functions but the schematic was a little different so I want to spend some time reviewing the wiring and gaining a better understanding of what it means.