New Graph v1

This example is the same as the first simple example but with the native graph block replaced by a new one with a higher precision representation on the NeoPixels.

The new graphing code calculates the value in terms of number of pixels but keeps the remainder from the calculation and varies the brightness of the final pixel based on that remainder to show values "between" the NeoPixels. The video below demonstrates the sensor being moved (just visible on the left) to indicate how the NeoPixels represent the distance values.

HC-SR04 sensor being moved to show varying brightness from new graphing.

The code has an if block with a true value. This looks a little odd but allows the programmer to switch between the two versions of the graphing for comparison. This could be removed if the programmer has made a decision to only use one type of graphing.

The NeoPixels visibly flicker when many of them are lit. The code sets them all to black and then sets each one that needs to be on or partially on. There are more efficient approaches to this. A key change is to use the set buffered and show blocks to apply the changes in one go when they are all done.

This guide was first published on Sep 17, 2018. It was last updated on Sep 17, 2018. This page (New Graph v1) was last updated on May 15, 2019.