Julius Bagdonas bagdonas

bagdonas / test-hall-sensor.ino

Created February 5, 2021 22:16

Test hall effect sensor (like A1324LUA-T). Attempt to make reading linear (based on distance)

	#include <math.h>

	const float POW_CBRT = 1.0f / 3.0f;
	const float R_MAX = pow(0.01f, POW_CBRT);

	float calcR(int value) {
	// I = r^-3
	// r = cbrt(1 / I)
	float I = (value / 1023.0f - 0.5f) * 2.0f; // [-1..1]
	float r = pow(abs(I), -POW_CBRT);