概述
使領(lǐng)帶像VU計(jì)一樣亮起來!這個(gè)Flora項(xiàng)目使用駐極體麥克風(fēng)放大器觸發(fā)沿著領(lǐng)帶長度用導(dǎo)電線縫制的16個(gè)Flora NeoPixels。
在開始這個(gè)項(xiàng)目之前,我們建議閱讀以下指南:
開始于FLORA
Adafruit麥克風(fēng)放大器突破
導(dǎo)電線
圖片由johngineer拍攝。
工具和用品
材料清單:
16 Flora NeoPixels
Flora主板
麥克風(fēng)放大器突破
鋰聚合物電池
用于電池袋的碎布
3層導(dǎo)電線
標(biāo)準(zhǔn)棉/多股線
絲帶電纜或?qū)щ娋€帶
斷裂式領(lǐng)帶或其他形式的領(lǐng)帶
您將使用針頭來縫合電路。
必須使用鋒利的剪刀!您還需要一個(gè)長尺子,一些裁縫的粉筆和一個(gè)拆縫刀。
不要忘了剝線鉗,鉗子和齊平剪線!
您將需要高質(zhì)量的基本萬用表,可以測量電壓和連續(xù)性。
單擊此處購買基本萬用表。
單擊此處購買頂級萬用表。
單擊此處購買袖珍萬用表。
也不要忘記學(xué)習(xí)如何使用您的萬用表!
您可能會(huì)在本地五金店找到的任何入門級“多合一”焊鐵都可以使用。與生活中的大多數(shù)事物一樣,您可以買得到。
升級到高端電烙鐵設(shè)置,例如我們在商店中購買的Hakko FX-888,將使焊接變得既輕松又有趣。
請勿使用“冷熱”烙鐵!它們不適合用于精密的電子工作,并且會(huì)損壞植物群(請參閱此處)。
單擊此處購買我們的入門級可調(diào)30W 110V烙鐵。
單擊此處可升級到原裝的Hakko FX-888可調(diào)溫度烙鐵。
學(xué)習(xí)如何使用大量教程進(jìn)行焊接!
您將需要60/40焊料的松香芯。好的焊料是一件好事。不良的焊錫會(huì)導(dǎo)致橋接和冷焊點(diǎn)很難找到。
單擊此處購買一盤含鉛焊料(建議初學(xué)者使用)。
單擊此處購買一盤無鉛焊料。
span》
電路圖
Flora像素都連接到公共接地總線,以及連接到VBATT的公共電源總線。 Flora像素?cái)?shù)據(jù)總線連接到D6。麥克風(fēng)放大器連接到3.3V,GND和D9。
電池袋和植物
使用一塊碎布縫一個(gè)小袋,裝上您的鋰電池。小袋應(yīng)縫在領(lǐng)帶的背面,就在Flora所在的上方,并在頂部有一個(gè)開口,以便于取出電池進(jìn)行充電。使用接縫裂開器稍微打結(jié)領(lǐng)帶的后接縫,以便您可以將JST插頭和電線穿入領(lǐng)帶內(nèi)并向下到Flora。
插頭在領(lǐng)帶的褶皺處加入了Flora,因此不會(huì)被抓住
通過在領(lǐng)帶上縫一些未使用的墊子,用普通線將Flora固定在適當(dāng)?shù)奈恢?。嘗試只縫到領(lǐng)帶的背面,使前部織物保持光滑。
縫紉像素
使用標(biāo)尺在裁縫的粉筆下沿著領(lǐng)帶的中心劃一條線,并沿著這條線均勻分配您的16個(gè)Flora像素。
用粉筆標(biāo)記每個(gè)像素的位置。
在D6旁邊將一長段導(dǎo)電線縫到GND,僅刺穿背面領(lǐng)帶。縫合到第一個(gè)像素的(-)墊上并固定(但不要切斷螺紋)。
通過將此長接地線連接到像素上的(-)焊盤來添加更多像素。
將數(shù)據(jù)總線從D6縫到第一個(gè)像素上的輸入板(標(biāo)有向內(nèi)箭頭)。捆扎,密封結(jié),并剪斷線。
在每個(gè)像素之間縫制一小段導(dǎo)電線,將一個(gè)像素的輸出連接到下一個(gè)輸入。
查看我們的《導(dǎo)電線》指南以獲取更多提示
使用另一長段導(dǎo)電線將Flora的VBATT焊盤連接到像素上的(+)焊盤。
縫合好幾個(gè)像素后,請用萬用表測試短路(確保長電源和地線沒有接觸),并啟動(dòng)NeoPixel庫測試代碼,以確保到目前為止您的初毛電路都正常。 br》
將其余部分縫合起來像素-您將有一條較長的接地總線,一條較長的電源總線以及每個(gè)輸入/輸出數(shù)據(jù)板之間的短線段。
添加麥克風(fēng)
要配合領(lǐng)帶,請?jiān)邴溈孙L(fēng)放大器上涂一點(diǎn)黑色指甲油。
將帶狀電纜的長度比扎帶的主要部分長。
將三根電線與麥克風(fēng)放大器一起使用,剝線將束縛在扎帶的結(jié)上。
將帶狀電纜穿過扎帶的內(nèi)部插入。在領(lǐng)帶結(jié)內(nèi)用接縫撕開器切一個(gè)小孔,并將帶狀電纜穿過其中。
剝?nèi)?dǎo)線末端并焊接直到麥克風(fēng)放大器上的三個(gè)孔。
使用大螺紋通過大安裝孔將麥克風(fēng)固定在領(lǐng)帶上。
回到板的Flora端,焊接相應(yīng)的導(dǎo)線連接到3.3V,GND和D9。
代碼
準(zhǔn)備就緒
此項(xiàng)目需要NeoPixel庫。對于較新的Arduino IDE版本,請選擇“庫管理器”,滾動(dòng)到“ Adafruit_NeoPixel”并安裝最新版本。
對于非常舊的Arduino IDE版本,請單擊NeoPixel Github存儲(chǔ)庫頁面上的ZIP按鈕進(jìn)行下載,然后重命名
有關(guān)對Flora板進(jìn)行編程的更多信息(包括所需的軟件),請轉(zhuǎn)到Flora入門指南。
代碼
我們對該項(xiàng)目感到非常興奮,我們制作了兩個(gè)Arduino草圖來測量房間的體積(Phil Burgess,James DeVito和Andy Doro)。您可以在LED Ampli-Tie Github存儲(chǔ)庫中下載它們。您可以從下面的清單中下載代碼。第一個(gè)動(dòng)態(tài)調(diào)整以適應(yīng)發(fā)生的任何情況:
下載:Project Zip 或Ampli_Tie_Dynamic.ino | 在Github上查看
復(fù)制代碼
/*
LED VU meter for Arduino and Adafruit NeoPixel LEDs. More info: http://learn.adafruit.com/led-ampli-tie/
Hardware requirements:
- Most Arduino or Arduino-compatible boards (ATmega 328P or better)。
- Adafruit Electret Microphone Amplifier (ID: 1063)
- Adafruit Flora RGB Smart Pixels (ID: 1260)
OR
- Adafruit NeoPixel Digital LED strip (ID: 1138)
- Optional: battery for portable use (else power through USB or adapter)
Software requirements:
- Adafruit NeoPixel library
Connections:
- 3.3V to mic amp +
- GND to mic amp -
- Analog pin to microphone output (configurable below)
- Digital pin to LED data input (configurable below)
See notes in setup() regarding 5V vs. 3.3V boards - there may be an
extra connection to make and one line of code to enable or disable.
Written by Adafruit Industries. Distributed under the BSD license.
This paragraph must be included in any redistribution.
*/
#include
#define N_PIXELS 16 // Number of pixels in strand
#define MIC_PIN A9 // Microphone is attached to this analog pin
#define LED_PIN 6 // NeoPixel LED strand is connected to this pin
#define DC_OFFSET 0 // DC offset in mic signal - if unusure, leave 0
#define NOISE 10 // Noise/hum/interference in mic signal
#define SAMPLES 60 // Length of buffer for dynamic level adjustment
#define TOP (N_PIXELS + 2) // Allow dot to go slightly off scale
#define PEAK_FALL 40 // Rate of peak falling dot
byte
peak = 0, // Used for falling dot
dotCount = 0, // Frame counter for delaying dot-falling speed
volCount = 0; // Frame counter for storing past volume data
int
vol[SAMPLES], // Collection of prior volume samples
lvl = 10, // Current “dampened” audio level
minLvlAvg = 0, // For dynamic adjustment of graph low & high
maxLvlAvg = 512;
Adafruit_NeoPixel
strip = Adafruit_NeoPixel(N_PIXELS, LED_PIN, NEO_GRB + NEO_KHZ800);
void setup() {
// This is only needed on 5V Arduinos (Uno, Leonardo, etc.)。
// Connect 3.3V to mic AND TO AREF ON ARDUINO and enable this
// line. Audio samples are ‘cleaner’ at 3.3V.
// COMMENT OUT THIS LINE FOR 3.3V ARDUINOS (FLORA, ETC.):
// analogReference(EXTERNAL);
memset(vol, 0, sizeof(vol));
strip.begin();
}
void loop() {
uint8_t i;
uint16_t minLvl, maxLvl;
int n, height;
n = analogRead(MIC_PIN); // Raw reading from mic
n = abs(n - 512 - DC_OFFSET); // Center on zero
n = (n 《= NOISE) ? 0 : (n - NOISE); // Remove noise/hum
lvl = ((lvl * 7) + n) 》》 3; // “Dampened” reading (else looks twitchy)
// Calculate bar height based on dynamic min/max levels (fixed point):
height = TOP * (lvl - minLvlAvg) / (long)(maxLvlAvg - minLvlAvg);
if(height 《 0L) height = 0; // Clip output
else if(height 》 TOP) height = TOP;
if(height 》 peak) peak = height; // Keep ‘peak’ dot at top
// Color pixels based on rainbow gradient
for(i=0; i if(i 》= height) strip.setPixelColor(i, 0, 0, 0);
else strip.setPixelColor(i,Wheel(map(i,0,strip.numPixels()-1,30,150)));
}
// Draw peak dot
if(peak 》 0 && peak 《= N_PIXELS-1) strip.setPixelColor(peak,Wheel(map(peak,0,strip.numPixels()-1,30,150)));
strip.show(); // Update strip
// Every few frames, make the peak pixel drop by 1:
if(++dotCount 》= PEAK_FALL) { //fall rate
if(peak 》 0) peak--;
dotCount = 0;
}
vol[volCount] = n; // Save sample for dynamic leveling
if(++volCount 》= SAMPLES) volCount = 0; // Advance/rollover sample counter
// Get volume range of prior frames
minLvl = maxLvl = vol[0];
for(i=1; i if(vol[i] 《 minLvl) minLvl = vol[i];
else if(vol[i] 》 maxLvl) maxLvl = vol[i];
}
// minLvl and maxLvl indicate the volume range over prior frames, used
// for vertically scaling the output graph (so it looks interesting
// regardless of volume level)。 If they‘re too close together though
// (e.g. at very low volume levels) the graph becomes super coarse
// and ’jumpy‘。..so keep some minimum distance between them (this
// also lets the graph go to zero when no sound is playing):
if((maxLvl - minLvl) 《 TOP) maxLvl = minLvl + TOP;
minLvlAvg = (minLvlAvg * 63 + minLvl) 》》 6; // Dampen min/max levels
maxLvlAvg = (maxLvlAvg * 63 + maxLvl) 》》 6; // (fake rolling average)
}
// Input a value 0 to 255 to get a color value.
// The colors are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
if(WheelPos 《 85) {
return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
} else if(WheelPos 《 170) {
WheelPos -= 85;
return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
} else {
WheelPos -= 170;
return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
}
}
/*
LED VU meter for Arduino and Adafruit NeoPixel LEDs. More info: http://learn.adafruit.com/led-ampli-tie/
Hardware requirements:
- Most Arduino or Arduino-compatible boards (ATmega 328P or better)。
- Adafruit Electret Microphone Amplifier (ID: 1063)
- Adafruit Flora RGB Smart Pixels (ID: 1260)
OR
- Adafruit NeoPixel Digital LED strip (ID: 1138)
- Optional: battery for portable use (else power through USB or adapter)
Software requirements:
- Adafruit NeoPixel library
Connections:
- 3.3V to mic amp +
- GND to mic amp -
- Analog pin to microphone output (configurable below)
- Digital pin to LED data input (configurable below)
See notes in setup() regarding 5V vs. 3.3V boards - there may be an
extra connection to make and one line of code to enable or disable.
Written by Adafruit Industries. Distributed under the BSD license.
This paragraph must be included in any redistribution.
*/
#include
#define N_PIXELS 16 // Number of pixels in strand
#define MIC_PIN A9 // Microphone is attached to this analog pin
#define LED_PIN 6 // NeoPixel LED strand is connected to this pin
#define DC_OFFSET 0 // DC offset in mic signal - if unusure, leave 0
#define NOISE 10 // Noise/hum/interference in mic signal
#define SAMPLES 60 // Length of buffer for dynamic level adjustment
#define TOP (N_PIXELS + 2) // Allow dot to go slightly off scale
#define PEAK_FALL 40 // Rate of peak falling dot
byte
peak = 0, // Used for falling dot
dotCount = 0, // Frame counter for delaying dot-falling speed
volCount = 0; // Frame counter for storing past volume data
int
vol[SAMPLES], // Collection of prior volume samples
lvl = 10, // Current “dampened” audio level
minLvlAvg = 0, // For dynamic adjustment of graph low & high
maxLvlAvg = 512;
Adafruit_NeoPixel
strip = Adafruit_NeoPixel(N_PIXELS, LED_PIN, NEO_GRB + NEO_KHZ800);
void setup() {
// This is only needed on 5V Arduinos (Uno, Leonardo, etc.)。
// Connect 3.3V to mic AND TO AREF ON ARDUINO and enable this
// line. Audio samples are ’cleaner‘ at 3.3V.
// COMMENT OUT THIS LINE FOR 3.3V ARDUINOS (FLORA, ETC.):
// analogReference(EXTERNAL);
memset(vol, 0, sizeof(vol));
strip.begin();
}
void loop() {
uint8_t i;
uint16_t minLvl, maxLvl;
int n, height;
n = analogRead(MIC_PIN); // Raw reading from mic
n = abs(n - 512 - DC_OFFSET); // Center on zero
n = (n 《= NOISE) ? 0 : (n - NOISE); // Remove noise/hum
lvl = ((lvl * 7) + n) 》》 3; // “Dampened” reading (else looks twitchy)
// Calculate bar height based on dynamic min/max levels (fixed point):
height = TOP * (lvl - minLvlAvg) / (long)(maxLvlAvg - minLvlAvg);
if(height 《 0L) height = 0; // Clip output
else if(height 》 TOP) height = TOP;
if(height 》 peak) peak = height; // Keep ’peak‘ dot at top
// Color pixels based on rainbow gradient
for(i=0; i if(i 》= height) strip.setPixelColor(i, 0, 0, 0);
else strip.setPixelColor(i,Wheel(map(i,0,strip.numPixels()-1,30,150)));
}
// Draw peak dot
if(peak 》 0 && peak 《= N_PIXELS-1) strip.setPixelColor(peak,Wheel(map(peak,0,strip.numPixels()-1,30,150)));
strip.show(); // Update strip
// Every few frames, make the peak pixel drop by 1:
if(++dotCount 》= PEAK_FALL) { //fall rate
if(peak 》 0) peak--;
dotCount = 0;
}
vol[volCount] = n; // Save sample for dynamic leveling
if(++volCount 》= SAMPLES) volCount = 0; // Advance/rollover sample counter
// Get volume range of prior frames
minLvl = maxLvl = vol[0];
for(i=1; i if(vol[i] 《 minLvl) minLvl = vol[i];
else if(vol[i] 》 maxLvl) maxLvl = vol[i];
}
// minLvl and maxLvl indicate the volume range over prior frames, used
// for vertically scaling the output graph (so it looks interesting
// regardless of volume level)。 If they’re too close together though
// (e.g. at very low volume levels) the graph becomes super coarse
// and ‘jumpy’。..so keep some minimum distance between them (this
// also lets the graph go to zero when no sound is playing):
if((maxLvl - minLvl) 《 TOP) maxLvl = minLvl + TOP;
minLvlAvg = (minLvlAvg * 63 + minLvl) 》》 6; // Dampen min/max levels
maxLvlAvg = (maxLvlAvg * 63 + maxLvl) 》》 6; // (fake rolling average)
}
// Input a value 0 to 255 to get a color value.
// The colors are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
if(WheelPos 《 85) {
return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
} else if(WheelPos 《 170) {
WheelPos -= 85;
return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
} else {
WheelPos -= 170;
return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
}
}
第二個(gè)允許您調(diào)整VU表的靈敏度:
下載:Project Zip 或 Ampli_Tie_Adjustable.ino | 在Github上查看
復(fù)制代碼
/*
LED VU meter for Arduino and Adafruit NeoPixel LEDs. More info: http://learn.adafruit.com/led-ampli-tie/
Hardware requirements:
- Most Arduino or Arduino-compatible boards (ATmega 328P or better)。
- Adafruit Electret Microphone Amplifier (ID: 1063)
- Adafruit Flora RGB Smart Pixels (ID: 1260)
OR
- Adafruit NeoPixel Digital LED strip (ID: 1138)
- Optional: battery for portable use (else power through USB or adapter)
Software requirements:
- Adafruit NeoPixel library
Connections:
- 3.3V to mic amp +
- GND to mic amp -
- Analog pin to microphone output (configurable below)
- Digital pin to LED data input (configurable below)
See notes in setup() regarding 5V vs. 3.3V boards - there may be an
extra connection to make and one line of code to enable or disable.
Written by Adafruit Industries. Distributed under the BSD license.
This paragraph must be included in any redistribution.
fscale function:
Floating Point Autoscale Function V0.1
Written by Paul Badger 2007
Modified from code by Greg Shakar
*/
#include
#include
#define N_PIXELS 16 // Number of pixels in strand
#define MIC_PIN A9 // Microphone is attached to this analog pin
#define LED_PIN 6 // NeoPixel LED strand is connected to this pin
#define SAMPLE_WINDOW 10 // Sample window for average level
#define PEAK_HANG 24 //Time of pause before peak dot falls
#define PEAK_FALL 4 //Rate of falling peak dot
#define INPUT_FLOOR 10 //Lower range of analogRead input
#define INPUT_CEILING 300 //Max range of analogRead input, the lower the value the more sensitive (1023 = max)
byte peak = 16; // Peak level of column; used for falling dots
unsigned int sample;
byte dotCount = 0; //Frame counter for peak dot
byte dotHangCount = 0; //Frame counter for holding peak dot
Adafruit_NeoPixel strip = Adafruit_NeoPixel(N_PIXELS, LED_PIN, NEO_GRB + NEO_KHZ800);
void setup()
{
// This is only needed on 5V Arduinos (Uno, Leonardo, etc.)。
// Connect 3.3V to mic AND TO AREF ON ARDUINO and enable this
// line. Audio samples are ‘cleaner’ at 3.3V.
// COMMENT OUT THIS LINE FOR 3.3V ARDUINOS (FLORA, ETC.):
// analogReference(EXTERNAL);
// Serial.begin(9600);
strip.begin();
strip.show(); // Initialize all pixels to ‘off’
}
void loop()
{
unsigned long startMillis= millis(); // Start of sample window
float peakToPeak = 0; // peak-to-peak level
unsigned int signalMax = 0;
unsigned int signalMin = 1023;
unsigned int c, y;
// collect data for length of sample window (in mS)
while (millis() - startMillis 《 SAMPLE_WINDOW)
{
sample = analogRead(MIC_PIN);
if (sample 《 1024) // toss out spurious readings
{
if (sample 》 signalMax)
{
signalMax = sample; // save just the max levels
}
else if (sample 《 signalMin)
{
signalMin = sample; // save just the min levels
}
}
}
peakToPeak = signalMax - signalMin; // max - min = peak-peak amplitude
// Serial.println(peakToPeak);
//Fill the strip with rainbow gradient
for (int i=0;i《=strip.numPixels()-1;i++){
strip.setPixelColor(i,Wheel(map(i,0,strip.numPixels()-1,30,150)));
}
//Scale the input logarithmically instead of linearly
c = fscale(INPUT_FLOOR, INPUT_CEILING, strip.numPixels(), 0, peakToPeak, 2);
if(c 《 peak) {
peak = c; // Keep dot on top
dotHangCount = 0; // make the dot hang before falling
}
if (c 《= strip.numPixels()) { // Fill partial column with off pixels
drawLine(strip.numPixels(), strip.numPixels()-c, strip.Color(0, 0, 0));
}
// Set the peak dot to match the rainbow gradient
y = strip.numPixels() - peak;
strip.setPixelColor(y-1,Wheel(map(y,0,strip.numPixels()-1,30,150)));
strip.show();
// Frame based peak dot animation
if(dotHangCount 》 PEAK_HANG) { //Peak pause length
if(++dotCount 》= PEAK_FALL) { //Fall rate
peak++;
dotCount = 0;
}
}
else {
dotHangCount++;
}
}
//Used to draw a line between two points of a given color
void drawLine(uint8_t from, uint8_t to, uint32_t c) {
uint8_t fromTemp;
if (from 》 to) {
fromTemp = from;
from = to;
to = fromTemp;
}
for(int i=from; i《=to; i++){
strip.setPixelColor(i, c);
}
}
float fscale( float originalMin, float originalMax, float newBegin, float
newEnd, float inputValue, float curve){
float OriginalRange = 0;
float NewRange = 0;
float zeroRefCurVal = 0;
float normalizedCurVal = 0;
float rangedValue = 0;
boolean invFlag = 0;
// condition curve parameter
// limit range
if (curve 》 10) curve = 10;
if (curve 《 -10) curve = -10;
curve = (curve * -.1) ; // - invert and scale - this seems more intuitive - postive numbers give more weight to high end on output
curve = pow(10, curve); // convert linear scale into lograthimic exponent for other pow function
/*
Serial.println(curve * 100, DEC); // multply by 100 to preserve resolution
Serial.println();
*/
// Check for out of range inputValues
if (inputValue 《 originalMin) {
inputValue = originalMin;
}
if (inputValue 》 originalMax) {
inputValue = originalMax;
}
// Zero Refference the values
OriginalRange = originalMax - originalMin;
if (newEnd 》 newBegin){
NewRange = newEnd - newBegin;
}
else
{
NewRange = newBegin - newEnd;
invFlag = 1;
}
zeroRefCurVal = inputValue - originalMin;
normalizedCurVal = zeroRefCurVal / OriginalRange; // normalize to 0 - 1 float
// Check for originalMin 》 originalMax - the math for all other cases i.e. negative numbers seems to work out fine
if (originalMin 》 originalMax ) {
return 0;
}
if (invFlag == 0){
rangedValue = (pow(normalizedCurVal, curve) * NewRange) + newBegin;
}
else // invert the ranges
{
rangedValue = newBegin - (pow(normalizedCurVal, curve) * NewRange);
}
return rangedValue;
}
// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
if(WheelPos 《 85) {
return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
}
else if(WheelPos 《 170) {
WheelPos -= 85;
return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
}
else {
WheelPos -= 170;
return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
}
}
/*
LED VU meter for Arduino and Adafruit NeoPixel LEDs. More info: http://learn.adafruit.com/led-ampli-tie/
Hardware requirements:
- Most Arduino or Arduino-compatible boards (ATmega 328P or better)。
- Adafruit Electret Microphone Amplifier (ID: 1063)
- Adafruit Flora RGB Smart Pixels (ID: 1260)
OR
- Adafruit NeoPixel Digital LED strip (ID: 1138)
- Optional: battery for portable use (else power through USB or adapter)
Software requirements:
- Adafruit NeoPixel library
Connections:
- 3.3V to mic amp +
- GND to mic amp -
- Analog pin to microphone output (configurable below)
- Digital pin to LED data input (configurable below)
See notes in setup() regarding 5V vs. 3.3V boards - there may be an
extra connection to make and one line of code to enable or disable.
Written by Adafruit Industries. Distributed under the BSD license.
This paragraph must be included in any redistribution.
fscale function:
Floating Point Autoscale Function V0.1
Written by Paul Badger 2007
Modified from code by Greg Shakar
*/
#include
#include
#define N_PIXELS 16 // Number of pixels in strand
#define MIC_PIN A9 // Microphone is attached to this analog pin
#define LED_PIN 6 // NeoPixel LED strand is connected to this pin
#define SAMPLE_WINDOW 10 // Sample window for average level
#define PEAK_HANG 24 //Time of pause before peak dot falls
#define PEAK_FALL 4 //Rate of falling peak dot
#define INPUT_FLOOR 10 //Lower range of analogRead input
#define INPUT_CEILING 300 //Max range of analogRead input, the lower the value the more sensitive (1023 = max)
byte peak = 16; // Peak level of column; used for falling dots
unsigned int sample;
byte dotCount = 0; //Frame counter for peak dot
byte dotHangCount = 0; //Frame counter for holding peak dot
Adafruit_NeoPixel strip = Adafruit_NeoPixel(N_PIXELS, LED_PIN, NEO_GRB + NEO_KHZ800);
void setup()
{
// This is only needed on 5V Arduinos (Uno, Leonardo, etc.)。
// Connect 3.3V to mic AND TO AREF ON ARDUINO and enable this
// line. Audio samples are ‘cleaner’ at 3.3V.
// COMMENT OUT THIS LINE FOR 3.3V ARDUINOS (FLORA, ETC.):
// analogReference(EXTERNAL);
// Serial.begin(9600);
strip.begin();
strip.show(); // Initialize all pixels to ‘off’
}
void loop()
{
unsigned long startMillis= millis(); // Start of sample window
float peakToPeak = 0; // peak-to-peak level
unsigned int signalMax = 0;
unsigned int signalMin = 1023;
unsigned int c, y;
// collect data for length of sample window (in mS)
while (millis() - startMillis 《 SAMPLE_WINDOW)
{
sample = analogRead(MIC_PIN);
if (sample 《 1024) // toss out spurious readings
{
if (sample 》 signalMax)
{
signalMax = sample; // save just the max levels
}
else if (sample 《 signalMin)
{
signalMin = sample; // save just the min levels
}
}
}
peakToPeak = signalMax - signalMin; // max - min = peak-peak amplitude
// Serial.println(peakToPeak);
//Fill the strip with rainbow gradient
for (int i=0;i《=strip.numPixels()-1;i++){
strip.setPixelColor(i,Wheel(map(i,0,strip.numPixels()-1,30,150)));
}
//Scale the input logarithmically instead of linearly
c = fscale(INPUT_FLOOR, INPUT_CEILING, strip.numPixels(), 0, peakToPeak, 2);
if(c 《 peak) {
peak = c; // Keep dot on top
dotHangCount = 0; // make the dot hang before falling
}
if (c 《= strip.numPixels()) { // Fill partial column with off pixels
drawLine(strip.numPixels(), strip.numPixels()-c, strip.Color(0, 0, 0));
}
// Set the peak dot to match the rainbow gradient
y = strip.numPixels() - peak;
strip.setPixelColor(y-1,Wheel(map(y,0,strip.numPixels()-1,30,150)));
strip.show();
// Frame based peak dot animation
if(dotHangCount 》 PEAK_HANG) { //Peak pause length
if(++dotCount 》= PEAK_FALL) { //Fall rate
peak++;
dotCount = 0;
}
}
else {
dotHangCount++;
}
}
//Used to draw a line between two points of a given color
void drawLine(uint8_t from, uint8_t to, uint32_t c) {
uint8_t fromTemp;
if (from 》 to) {
fromTemp = from;
from = to;
to = fromTemp;
}
for(int i=from; i《=to; i++){
strip.setPixelColor(i, c);
}
}
float fscale( float originalMin, float originalMax, float newBegin, float
newEnd, float inputValue, float curve){
float OriginalRange = 0;
float NewRange = 0;
float zeroRefCurVal = 0;
float normalizedCurVal = 0;
float rangedValue = 0;
boolean invFlag = 0;
// condition curve parameter
// limit range
if (curve 》 10) curve = 10;
if (curve 《 -10) curve = -10;
curve = (curve * -.1) ; // - invert and scale - this seems more intuitive - postive numbers give more weight to high end on output
curve = pow(10, curve); // convert linear scale into lograthimic exponent for other pow function
/*
Serial.println(curve * 100, DEC); // multply by 100 to preserve resolution
Serial.println();
*/
// Check for out of range inputValues
if (inputValue 《 originalMin) {
inputValue = originalMin;
}
if (inputValue 》 originalMax) {
inputValue = originalMax;
}
// Zero Refference the values
OriginalRange = originalMax - originalMin;
if (newEnd 》 newBegin){
NewRange = newEnd - newBegin;
}
else
{
NewRange = newBegin - newEnd;
invFlag = 1;
}
zeroRefCurVal = inputValue - originalMin;
normalizedCurVal = zeroRefCurVal / OriginalRange; // normalize to 0 - 1 float
// Check for originalMin 》 originalMax - the math for all other cases i.e. negative numbers seems to work out fine
if (originalMin 》 originalMax ) {
return 0;
}
if (invFlag == 0){
rangedValue = (pow(normalizedCurVal, curve) * NewRange) + newBegin;
}
else // invert the ranges
{
rangedValue = newBegin - (pow(normalizedCurVal, curve) * NewRange);
}
return rangedValue;
}
// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
if(WheelPos 《 85) {
return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
}
else if(WheelPos 《 170) {
WheelPos -= 85;
return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
}
else {
WheelPos -= 170;
return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
}
}
戴上它!
帶你去鎮(zhèn)上打領(lǐng)帶!非常適合舉辦聚會(huì),音樂會(huì),婚禮,圣餐儀式。..
如果您需要洗領(lǐng)帶,取下電池并輕輕點(diǎn)清潔-像素,線和植物區(qū)系可以處理變濕(然后干透) ,但不要讓水進(jìn)入麥克風(fēng)。
責(zé)任編輯:wv
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