From f5725d13ef13953ffdb1c430e64b7c382aeb8285 Mon Sep 17 00:00:00 2001 From: dragonprevost Date: Tue, 13 Nov 2018 11:58:07 -0800 Subject: image formatting --- readme.md | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/readme.md b/readme.md index 9b96aad..5f592bd 100644 --- a/readme.md +++ b/readme.md @@ -13,13 +13,14 @@ Compile the project using wp85: ``make wp85`` ## Setting Variables -To change the sensitivity of the application you must edit the `motionMonitor/motionMonitor.c` file. +To change the sensitivity of impact detection you must edit the `motionMonitor/motionMonitor.c` file. The Accelerometer measures acceleration in 3 dimensions, X, Y, and Z. These dimensions of acceleration are recorded and the magnitude of their resulting vector is calculated using ``double impactMagnitude = sqrt(x * x + y * y + z * z);`` + +![Magnitude](https://www.intmath.com/vectors/img/235-3D-vector.png) + + `#define DEFAULT_THRESHOLD_MS2 17` determines the magnitude of the resulting vector that will trigger the application to detect a sudden impact. If adjusting the value of `DEFAUTL_THRESHOLD_MS2` keep in mind that gravity implies a motionless magnitude of -9.8m/s^2 As visualized with the red vector here. -![Magnitude](https://www.intmath.com/vectors/img/235-3D-vector.png) - - -- cgit v1.2.3