It views a matrix as it is electrically - a linear arrangement of LEDs. When configuring a linear strip, set the matrix width to 1, and the height to the number of pixels in the string.Īlso note that FastLED is a really fast library for sending pixels out to LED strings (kudos!), but it's not a matrix library. Tip: Don't have a matrix handy? I think the simulation also looks really good on a long one-pixel-wide strip. If you get it running in a different configuration, please let me know! Also, see "Matrix Size and Processor Selection" below for more information. a NodeMCU/ESP8266 using the 44x11 matrix.an Arduino Mega 2560 using a matrix of 44x11.Note: When I say "large" in this context, I do not mean physical size it always and only means the total number of pixels. After getting the effect right, I went through and tried to optimize a bit, particularly for memory use, to try and squeeze in larger displays on the lesser Arduinos. To simulate the licking flames of fire, I added random "flares" in the fire that rise from the bottom of the display, and also radiate outward, which I think is really the thing that most improves the effect. The simulation does what I think pretty much everyone does at the most basic level: establishes "heat" near the bottom of the display and percolates it up, reducing the heat as you go. That worked famously, so after some tweaking and a couple of hours playing with it on both Arduino and a NodeMCU/ESP8266, I was satisfied (for the moment). But it was still not refreshing quite fast enough for my taste, so I moved off the Adafruit libraries to FastLED. So when things started to look like they were going to work well, I dug out a Mega 2560, which had enough RAM to manage the entire 44x11 display. The Uno's RAM topped out at about 11x12, meaning I was using less than 1/4th of the entire matrix width available. I started development with an Arduino Uno and the Adafruit NeoMatrix library, and that worked fine as long as I kept the display size down. It works on any LED matrix supported by FastLED. So I ignored all of those other implementations, and just set about failing repeatedly. There's plenty of code available to do this, but I just wanted to figure out for myself how to code a nice-looking animation. It can be accessed by ASHE members via the link in the box above.Just on a whim, I decided to make my own fire simulation using a 44x11 WS2812 matrix I had purchased on Amazon. Given this new interpretation and knowledge, ASHE has modified the Excel version of its fire drill matrix planning tool to automatically turn cells red if the proposed drill does not meet the varying time criteria. The official response to the scenario/question was “This would be scored as there is not a one-hour difference between all drills.” The hospital accepted the citation but, to get further clarification, posed the scenario to the central office for official interpretation for future drills. The hospital clearly met the quarterly criteria and varied the drills more than an hour between quarters, so why did the citation occur? The surveyor stated that the hospital did not vary drills greater than one hour between all drills within the past four to six quarters and deemed that this pattern could be predicted. 14 at 10:10 second quarter on April 17 at 14:15 and third quarter on July 12 at 10:40. For years it was implicitly understood that the expectation of varying times must be greater than one hour between quarters, but one hospital met this criterion as indicated by the data below, and they were still cited:įirst shift - first quarter on Jan.
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