Hi,
this is my first post.
i found some rpm based shiftlight code online, and i would like some minor tweak on it. im kinda new to arduino :)
the original code is about a ledstrip, lighting up one by one pixel when rpm increase : http://https://www.youtube.com/watch?v=9aou7hNQFXM&feature=youtu.be&ab_channel=MickTheMechanic
//Shift Light V1.5
#include
#define PIN 6 //LED Data Pin
#define NUMPIXELS 16 //number of leds connected
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
//Calculate the frequency of the tacho signal you are using and adjust the following values accordingly
//example: for a standard tacho signal on a 4 cylinder engine the frequeny is equal to the RPM divided by 30
const unsigned int onFrequency = 20; //startup sequence, value represents engine speed higher than cranking and lower than idle
const unsigned int minFrequency = 123; // minimum frequency to begin turning on LEDs
const unsigned int maxFrequency = 235; // maximum frequency in normal range, after this value shift flash will occur
const unsigned int shiftFrequency = 250; // frequency range from max to shift when shifting should happen, after this value overrev flash will occur
//Set the color for each LED in the neo pixel strip
//Colors are set using an RGB value ranging from (0,0,0) to (255,255,255)
const uint32_t tachColor[NUMPIXELS] = {
Adafruit_NeoPixel::Color(0, 120, 0),//green
Adafruit_NeoPixel::Color(0, 120, 0),
Adafruit_NeoPixel::Color(0, 120, 0),
Adafruit_NeoPixel::Color(15, 105, 0),
Adafruit_NeoPixel::Color(30, 90, 0),
Adafruit_NeoPixel::Color(45, 75, 0),
Adafruit_NeoPixel::Color(60, 60, 0),//orange
Adafruit_NeoPixel::Color(75, 45, 0),
Adafruit_NeoPixel::Color(90, 30, 0),
Adafruit_NeoPixel::Color(105, 15, 0),
Adafruit_NeoPixel::Color(120, 0, 0),//red
Adafruit_NeoPixel::Color(0, 0, 120),//blue
Adafruit_NeoPixel::Color(0, 0, 120),
Adafruit_NeoPixel::Color(0, 0, 120),
Adafruit_NeoPixel::Color(0, 0, 120),
Adafruit_NeoPixel::Color(0, 0, 120),
};
//Set the frequency when each LED should turn on
//First LED turns on at minFrequency
const unsigned int lightShiftFreq[NUMPIXELS] = {
minFrequency,
130,
137,
144,
151,
158,
165,
172,
179,
186,
193,
200,
207,
214,
221,
228,
};
bool hasStartupSequenceRun = false; // only run startup sequence one time
const byte tachPin = 2;
unsigned long igfreq;
void setup() {
pixels.begin(); // This initializes the NeoPixel library.
}
void loop() {
float ighigh, iglow;
unsigned long igcal1, igcal2;
//measure period of tach signal
ighigh = pulseIn(tachPin, HIGH);
iglow = pulseIn(tachPin, LOW);
igcal1 = 1000 / ((ighigh / 1000) + (iglow / 1000));
//do it again
ighigh = pulseIn(tachPin, HIGH);
iglow = pulseIn(tachPin, LOW);
igcal2 = 1000 / ((ighigh / 1000) + (iglow / 1000));
//to filter out some noise, we only consider our measurement valid if they are similar in value, we accept the average.
if ((igcal1 - igcal2) < 8) {
igfreq = (igcal1 + igcal2) / 2;
}
if (hasStartupSequenceRun == false) {
if (igfreq > onFrequency) {
//run start sequence
//LEDs will light up, flash and light out upon starting the engine.
for ( int i = 0; i < NUMPIXELS; ++i) {
pixels.setPixelColor(i, tachColor[i]);
pixels.show();
delay(50);
}
for(int a=0; a<10; a++) {
pixels.fill(pixels.Color(0, 0, 120));
pixels.show();
delay(20);
pixels.fill(pixels.Color(0, 0, 0));
pixels.show();
delay(20);
}
for ( int i = 0; i < NUMPIXELS; ++i) {
pixels.setPixelColor(i, tachColor[i]);
pixels.show();
}
for ( int i = NUMPIXELS-1; i >= 0; --i) {
pixels.setPixelColor(i, pixels.Color(0, 0, 0));
pixels.show();
delay(50);
}
hasStartupSequenceRun = true;
pixels.fill(pixels.Color(0, 0, 0));
pixels.show();
}
if (igfreq < onFrequency) {
//resets hasStartupSequenceRun to false if engine stops but Arduino remains powered,
//startupsequence will rerun upon restarting the engine
hasStartupSequenceRun = false;
}
}
if (igfreq < maxFrequency) {
// normal operating range
for ( int i = 0; i < NUMPIXELS; ++i) {
if (igfreq > lightShiftFreq[i]) {
pixels.setPixelColor(i, tachColor[i]);
}
else {
pixels.setPixelColor(i, pixels.Color(0, 0, 0));
}
}
pixels.show();
}
else if (igfreq >= maxFrequency && igfreq < shiftFrequency) {
//shift flash
//default color=blue
//to change shift flash color, edit RGB value in following line
pixels.fill(pixels.Color(0, 0, 120));
pixels.show();
delay(20);
pixels.fill(pixels.Color(0, 0, 0));
pixels.show();
delay(20);
}
else if (igfreq >= shiftFrequency) {
//overrev flash
//default color=red
//to change overrev flash color, edit RGB value in following line
pixels.fill(pixels.Color(120, 0, 0));
pixels.show();
delay(20);
pixels.fill(pixels.Color(0, 0, 0));
pixels.show();
delay(20);
}
}
i just want to use 4 leds in my project, and the goal is to light them all 4 up at the same time in the same color, and then fade the color to another color, when rpm increase. this is what i have so far, adjusted for 4 leds. but the rest is the same as original code.
//Shift Light V1.5
#include
#define PIN 6 //LED Data Pin
#define NUMPIXELS 4 //number of leds connected
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
//Calculate the frequency of the tacho signal you are using and adjust the following values accordingly
//example: for a standard tacho signal on a 4 cylinder engine the frequeny is equal to the RPM divided by 30
const unsigned int onFrequency = 20; //startup sequence, value represents engine speed higher than cranking and lower than idle
const unsigned int minFrequency = 123; // minimum frequency to begin turning on LEDs
const unsigned int maxFrequency = 235; // maximum frequency in normal range, after this value shift flash will occur
const unsigned int shiftFrequency = 250; // frequency range from max to shift when shifting should happen, after this value overrev flash will occur
//Set the color for each LED in the neo pixel strip
//Colors are set using an RGB value ranging from (0,0,0) to (255,255,255)
const uint32_t tachColor[NUMPIXELS] = {
Adafruit_NeoPixel::Color(0, 0, 120),//blue
Adafruit_NeoPixel::Color(0, 120, 0),//orange
Adafruit_NeoPixel::Color(120, 0, 0),//red
Adafruit_NeoPixel::Color(0, 0, 120),//blue
};
//Set the frequency when each LED should turn on
//First LED turns on at minFrequency
const unsigned int lightShiftFreq[NUMPIXELS] = {
130,
165,
185,
211,
};
hope someone can help me :) Thanks! Maurice
