Force Sensor for Pressure Expression
Prototype sensor you could build yourself. Plans are to scale it up and template the cutting of the layers for a commercially viable poly-touch interface of some kind.
But you can make this DIY version yourself, see how in our post. Code below.
The pads are sensitive enough that we made a mouse mode. The left pad moves the cursor left if you press less than 50%, and right if you press harder. The right pad does up and down. It’s proportional, and you get the hang of it quick. It’s perfect for nudging the cursor after moving it with the distance sensors. Oh yeah, you haven’t seen the distance sensors controlling the mouse yet, demo in future post.
Code for Pro Micro or Arduino Leonardo. This device also has the sharp distance sensors and several other pots and buttons.
#include <Adafruit_NeoPixel.h>
#include <MIDIUSB.h>
#include <Keyboard.h>
#include <Mouse.h>
#define channel 12 // really that means it's ch 13
#define space 30
int br = 255;
#define MIDI_CC MIDI_CC_GENERAL1
#define distfilter 15
#define tfilter 3
int distchange;
int distchange2;
int distchange3;
int dist;
int dist2;
int dist3;
int ln1; // previous note
int ln2;
int ln3;
int tcheck1;
int tcheck2;
int touch1;
int touch2;
int cc1;
int cc2 = 5;
int cc3 = 7;
int ct1 = 6;
int ct2 = 4;
bool sa;
bool sb;
bool b1;
bool b4 = true;
bool b5;
bool b6;
bool mmode;
bool smode;
bool tmode;
bool pup; //full octave pitch up;
int mx;
int my;
bool off1;
bool off2;
bool off3;
#define NUM_AI 4
#define ANALOGUE_PIN_ORDER A0, A6, A7, A8
#define MIDI_CC MIDI_CC_GENERAL1
#define FILTER_AMOUNT 12 // for sliders n knobs
#define ANALOGUE_INPUT_CHANGE_TIMEOUT 200000
byte analogueInputMapping[4] = {ANALOGUE_PIN_ORDER};
byte analogueInputs[4];
byte tempAnalogueInput;
byte digitalOffset = 0;
byte analogueDiff = 0;
boolean analogueInputChanging[4];
unsigned long analogueInputTimer[4];
Adafruit_NeoPixel strip = Adafruit_NeoPixel(29, 5, NEO_GRB + NEO_KHZ800);
void setup() {
Keyboard.begin();
Mouse.begin();
strip.begin();
strip.setBrightness(br);
strip.show();
pinMode(A1, INPUT); // sensor
pinMode(A2, INPUT); // sensor
pinMode(A3, INPUT); // sensor
pinMode(A0, INPUT); // slider
pinMode(A6, INPUT); // slider
pinMode(A7, INPUT); // slider
pinMode(A8, INPUT); // slider
pinMode(A9, INPUT_PULLUP); // knob
pinMode(A10, INPUT_PULLUP); // knob
pinMode(14, INPUT); // switch
pinMode(15, INPUT); // switch
pinMode(5, OUTPUT); // LEDs
pinMode(2, INPUT_PULLUP); // button
pinMode(3, INPUT_PULLUP); // button
pinMode(7, INPUT_PULLUP); // button
pinMode(16, INPUT_PULLUP); // button
pinMode(0, INPUT_PULLUP); // button
pinMode(1, INPUT_PULLUP); // button
Mouse.release();
Keyboard.releaseAll();
}
void controlChange(byte thechannel, byte control, byte value) {
midiEventPacket_t event = {0x0B, 0xB0 | thechannel, control, value};
MidiUSB.sendMIDI(event);
MidiUSB.flush();
}
void pitchBendChange(byte thechannel, int value) {
byte lowValue = value & 0x7F;
byte highValue = value >> 7;
midiEventPacket_t event = {0x0E, 0xE0 | thechannel, lowValue, highValue};
MidiUSB.sendMIDI(event);
MidiUSB.flush();
}
void noteOn(byte thechannel, byte pitch, byte velocity) {
midiEventPacket_t noteOn = {0x09, 0x90 | thechannel, pitch, velocity};
MidiUSB.sendMIDI(noteOn);
}
void noteOff(byte thechannel, byte pitch, byte velocity) {
midiEventPacket_t noteOff = {0x08, 0x80 | thechannel, pitch, velocity};
MidiUSB.sendMIDI(noteOff);
}
void loop() {
sensor();
touch();
sliders();
swcheck();
}
void swcheck() {
if (digitalRead(14) != sa || digitalRead(15) != sb) {
sa = digitalRead(14);
sb = digitalRead(15);
stripn();
if (mmode) {
if (sa) {
Mouse.press();
} else {
Mouse.release();
}
} else {
controlChange(channel, space + cc1, 0);
delay(50);
controlChange(channel, space + cc2, 0);
delay(50);
controlChange(channel, space + cc3, 0);
delay(50);
if (!sa && !sb) {
cc3 = 7; // fuzz drum
cc2 = 5; // fuzz bass
cc1 = 0; // filter wah
ct2 = 4;
ct1 = 6;
}
if (sa && !sb) {
cc3 = 14; // crumble
cc2 = 4; // glitch bass
cc1 = 6; // glitch drum
ct2 = 5;
ct1 = 0;
}
if (!sa && sb) {
cc3 = 13; // radiate
cc2 = 11; // flange
cc1 = 12; // chorus
ct2 = 62;
ct1 = 61;
}
if (sa && sb) {
cc3 = 29; // new
cc2 = 28; // new
cc1 = 27; // new
ct2 = 64;
ct1 = 63;
}
}
}
if (!digitalRead(0)) { //back button L
if (mmode) {
Mouse.click(MOUSE_RIGHT);
} else if (tmode) {
if (b1) {
b1 = false;
strip.setPixelColor(1, strip.Color(0, 3, 0));
strip.setPixelColor(27, strip.Color(0, 3, 0));
strip.show();
controlChange(channel, space + 81, 0);
} else {
b1 = true;
strip.setPixelColor(1, strip.Color(0, 0, 3));
strip.setPixelColor(27, strip.Color(0, 0, 3));
strip.show();
controlChange(channel, space + 81, 127);
}
} else {
Keyboard.press(0x87);
Keyboard.press(0x86);
Keyboard.press(0x70);
Keyboard.release(0x70);
Keyboard.release(0x86);
Keyboard.release(0x87);
}
delay(300);
while (!digitalRead(0)) {}
}
if (!digitalRead(1)) { //back button R
if (tmode) {
tmode = false;
for (int panic = 0; panic < 24; panic++) {
for (int pchan = 0; pchan < 2; pchan++) {
noteOff(pchan, panic + 68, 64);
}
}
MidiUSB.flush();
}
if (mmode) {
if (smode) {
smode = false;
} else {
smode = true;
}
stripn();
delay(300);
} else {
b4 = false;
mmode = true;
strip.setPixelColor(0, strip.Color(0, 0, 0));
strip.setPixelColor(28, strip.Color(0, 0, 0));
strip.setPixelColor(1, strip.Color(0, 0, 0));
strip.setPixelColor(27, strip.Color(0, 0, 0));
stripn();
controlChange(channel, space + cc1, 0);
delay(50);
controlChange(channel, space + cc2, 0);
delay(50);
controlChange(channel, space + cc3, 0);
delay(200);
}
while (!digitalRead(1)) {}
}
if (!digitalRead(7)) { //next
if (!tmode) {
b5 = false;
b6 = false;
controlChange(channel, space + 74, 0);
controlChange(channel, space + 34, 0);
controlChange(channel, space + 75, 0);
controlChange(channel, space + 35, 0);
}
if (tmode && !pup) {
pup = true;
stripn();
delay(300);
} else {
tmode = true;
mmode = false;
b4 = false;
pup = false;
strip.setPixelColor(9, strip.Color(0, 0, 0));
strip.setPixelColor(19, strip.Color(0, 0, 0));
stripn();
controlChange(channel, space + cc1, 0);
delay(50);
controlChange(channel, space + cc2, 0);
delay(50);
controlChange(channel, space + cc3, 0);
delay(200);
}
while (!digitalRead(7)) {}
}
if (!digitalRead(3)) { // set
if (tmode) {
tmode = false;
b4 = true;
b5 = false;
b6 = false;
for (int panic = 0; panic < 24; panic++) {
for (int pchan = 0; pchan < 2; pchan++) {
noteOff(pchan, panic + 68, 64);
}
}
controlChange(channel, space + 74, 0);
controlChange(channel, space + 34, 0);
controlChange(channel, space + 75, 0);
controlChange(channel, space + 35, 0);
MidiUSB.flush();
}
if (!b4 && !mmode) {
b4 = true;
stripn();
controlChange(channel, space + cc1, 0);
delay(50);
controlChange(channel, space + cc2, 0);
delay(50);
controlChange(channel, space + cc3, 0);
delay(200);
distchange = 0;
distchange2 = 0;
distchange3 = 0;
} else {
b4 = false;
if (mmode) {
mmode = false;
Mouse.release();
Keyboard.releaseAll();
}
strip.setPixelColor(0, strip.Color(0, 0, 0));
strip.setPixelColor(28, strip.Color(0, 0, 0));
strip.setPixelColor(1, strip.Color(0, 0, 0));
strip.setPixelColor(27, strip.Color(0, 0, 0));
stripn();
delay(300);
}
while (!digitalRead(3)) {}
}
if (!digitalRead(16)) { //plus
if (mmode) {
Keyboard.press(0x87);
Keyboard.press(0x86);
Keyboard.press(0x3D);
Keyboard.release(0x3D);
delay(10);
Keyboard.press(0x3D);
Keyboard.release(0x3D);
Keyboard.release(0x86);
Keyboard.release(0x87);
delay(100);
} else {
if (!b5) {
if (b6) {
b6 = false;
if (tmode) {
controlChange(channel, space + 75, 0);
} else {
controlChange(channel, space + 35, 0);
}
for (int bw6 = 1; bw6 < 9; bw6++) {
strip.setPixelColor(bw6 + 19, strip.Color(0, 3, 0));
strip.setPixelColor(bw6, strip.Color(0, 3, 0));
}
} else {
b5 = true;
if (tmode) {
controlChange(channel, space + 74, 127);
} else {
controlChange(channel, space + 34, 127);
}
for (int bw5 = 1; bw5 < 9; bw5++) {
strip.setPixelColor(bw5 + 19, strip.Color(3, 3, 3));
strip.setPixelColor(bw5, strip.Color(0, 3, 0));
}
}
strip.show();
delay(400);
} else {
b5 = false;
if (tmode) {
controlChange(channel, space + 74, 0);
} else {
controlChange(channel, space + 34, 0);
}
for (int bv5 = 1; bv5 < 9; bv5++) {
strip.setPixelColor(bv5 + 19, strip.Color(0, 3, 0));
strip.setPixelColor(bv5, strip.Color(0, 3, 0));
}
strip.show();
delay(400);
}
}
while (!digitalRead(16)) {}
}
if (!digitalRead(2)) { //minus
if (mmode) {
Keyboard.press(0x87);
Keyboard.press(0x86);
Keyboard.press(0x38);
Keyboard.release(0x38);
Keyboard.release(0x86);
Keyboard.release(0x87);
} else {
if (!b6) {
if (b5) {
b5 = false;
if (tmode) {
controlChange(channel, space + 74, 0);
} else {
controlChange(channel, space + 34, 0);
}
for (int bw6 = 1; bw6 < 9; bw6++) {
strip.setPixelColor(bw6 + 19, strip.Color(0, 3, 0));
strip.setPixelColor(bw6, strip.Color(0, 3, 0));
}
} else {
b6 = true;
if (tmode) {
controlChange(channel, space + 75, 127);
} else {
controlChange(channel, space + 35, 127);
}
for (int bw6 = 1; bw6 < 9; bw6++) {
strip.setPixelColor(bw6 + 19, strip.Color(0, 3, 0));
strip.setPixelColor(bw6, strip.Color(3, 3, 3));
}
}
strip.show();
} else {
b6 = false;
if (tmode) {
controlChange(channel, space + 75, 0);
} else {
controlChange(channel, space + 35, 0);
}
for (int bv6 = 1; bv6 < 9; bv6++) {
strip.setPixelColor(bv6 + 19, strip.Color(0, 3, 0));
strip.setPixelColor(bv6, strip.Color(0, 3, 0));
}
strip.show();
}
}
delay(400);
while (!digitalRead(16)) {}
}
} // end switch check
void sensor() {
if (!b4) {
mx = 0;
my = 0;
int d1a = analogRead(A1);
int d2a = analogRead(A1);
int d3a = analogRead(A1);
int distcheck = (d1a + d2a + d3a) / 3;
if (distcheck < 150) {
distcheck = 0;
if (!off1) {
off1 = true;
noteOff(0, 70, 64);
MidiUSB.flush();
}
}
if ((distcheck < distchange - distfilter) || (distcheck > distchange + distfilter)) {
off1 = false;
if (distcheck > 1000) {
distcheck = 0;
}
dist = ((distcheck - 135) / 4.5);
if (dist > 127) {
dist = 127;
}
if (dist < 0) {
dist = 0;
}
if (mmode) {
if ((dist > 20) && (dist < 64)) {
mx = -((dist - 20) / 4);
}
if (dist > 63) {
mx = -((127 - dist) / 4);
}
if (smode) {
if ((dist > 20) && (dist < 108)) {
Keyboard.press(0x81);
Mouse.move(0, 0, -1 - sb);
Keyboard.release(0x81);
delay(100);
}
} else {
Mouse.move(mx * (sb + 1), 0, 0);
}
} else if (tmode) {
delay(48);
noteOff(0, ln1, 64);
MidiUSB.flush();
ln1=dist / 8 + 70;
noteOn(0, ln1, 64);
MidiUSB.flush();
} else {
controlChange(channel, space + cc1, dist);
}
distchange = distcheck;
stripn();
}
int d1b = analogRead(A2);
int d2b = analogRead(A2);
int d3b = analogRead(A2);
int distcheck2 = (d1b + d2b + d3b) / 3;
if (distcheck2 < 150) {
distcheck2 = 0;
if (!off2) {
off2 = true;
noteOff(1, 70, 64);
MidiUSB.flush();
}
}
if ((distcheck2 < distchange2 - distfilter) || (distcheck2 > distchange2 + distfilter)) {
off2 = false;
if (distcheck2 > 1000) {
distcheck2 = 0;
}
dist2 = ((distcheck2 - 135) / 4.5);
if (dist2 > 127) {
dist2 = 127;
}
if (dist2 < 0) {
dist2 = 0;
}
if (mmode) {
if ((dist2 > 20) && (dist2 < 53)) {
my = -((53 - dist2) / 4);
}
if ((dist2 > 73) && (dist2 < 108)) {
my = ((dist2 - 72) / 4);
}
if (smode) {
if ((dist2 > 20) && (dist2 < 53)) {
Mouse.move(0, 0, -1 - sb);
delay(100);
}
if ((dist2 > 73) && (dist2 < 108)) {
Mouse.move(0, 0, 1 + sb);
delay(100);
}
} else {
Mouse.move(0, my * ((sb * 2) + 1), 0);
}
} else if (tmode) {
if (sa) {
controlChange(channel, space + 76, dist2);
} else {
delay(48);
noteOff(1, ln2, 64);
MidiUSB.flush();
ln2=dist2 / 8 + 70;
noteOn(1, ln2, 64);
MidiUSB.flush();
}
} else {
controlChange(channel, space + cc2, dist2);
}
distchange2 = distcheck2;
stripn();
}
int d1c = analogRead(A3);
int d2c = analogRead(A3);
int d3c = analogRead(A3);
int distcheck3 = (d1c + d2c + d3c) / 3;
if (distcheck3 < 150) {
distcheck3 = 0;
if (!off3) {
off3 = true;
noteOff(2, 70, 64);
MidiUSB.flush();
}
}
if ((distcheck3 < distchange3 - distfilter) || (distcheck3 > distchange3 + distfilter)) {
off3 = false;
if (distcheck3 > 1000) {
distcheck3 = 0;
}
dist3 = ((distcheck3 - 135) / 4.5);
if (dist3 > 127) {
dist3 = 127;
}
if (dist3 < 0) {
dist3 = 0;
}
if (mmode) {
if ((dist3 > 20) && (dist3 < 64)) {
mx = ((dist3 - 20) / 4);
}
if (dist3 > 63) {
mx = ((127 - dist3) / 4);
}
if (smode) {
if ((dist3 > 20) && (dist3 < 108)) {
Keyboard.press(0x81);
Mouse.move(0, 0, 1 + sb);
Keyboard.release(0x81);
delay(100);
}
} else {
Mouse.move(mx * (sb + 1), 0, 0);
}
} else if (tmode) {
if (sb) {
controlChange(channel, space + 70, dist3);
} else {
delay(48);
noteOff(2, ln3, 64);
MidiUSB.flush();
ln3=dist3 / 8 + 70;
noteOn(2, ln3, 64);
MidiUSB.flush();
}
} else {
controlChange(channel, space + cc3, dist3);
}
distchange3 = distcheck3;
stripn();
}
}
}
void sliders() { // now the sliders
byte i = 0;
for (i = 0; i < 4; i++)
{
tempAnalogueInput = analogRead(analogueInputMapping[i]) / 4;
analogueDiff = abs(tempAnalogueInput - analogueInputs[i]);
if ((analogueDiff > 0 && analogueInputChanging[i] == true) || analogueDiff >= FILTER_AMOUNT)
{
if (analogueInputChanging[i] == false || analogueDiff >= FILTER_AMOUNT)
{
analogueInputTimer[i] = micros();
analogueInputChanging[i] = true;
}
else if (micros() - analogueInputTimer[i] > ANALOGUE_INPUT_CHANGE_TIMEOUT)
{
analogueInputChanging[i] = false;
}
if (analogueInputChanging[i] == true)
{
analogueInputs[i] = tempAnalogueInput;
if (i == 0) {
controlChange(channel, space + 23, tempAnalogueInput / 2); // C vol
}
if (i == 1) {
if (tmode) {
controlChange(channel, space + 70, tempAnalogueInput / 2); // theremin vol cc
} else {
controlChange(channel, space + 20, tempAnalogueInput / 2); // noise select
}
}
if (i == 2) {
if (tmode) {
controlChange(channel, space + 71, tempAnalogueInput / 2); // theremin select
} else {
controlChange(channel, space + 22, tempAnalogueInput / 2); // drums select
}
}
if (i == 3) {
if (tmode) {
controlChange(channel, space + 72, tempAnalogueInput / 2); // theremin verb
} else {
controlChange(channel, space + 24, tempAnalogueInput / 2); // bass select
}
}
for (int p = 0; p < 29; p++) {
if ((p > round(tempAnalogueInput / 9 - 1)) && (p < round(tempAnalogueInput / 9 + 1))) {
if (b4) {
strip.setPixelColor(p, strip.Color(6, 3, 0));
} else {
strip.setPixelColor(p, strip.Color(64, 0, 0));
}
} else if (p == 9 - (tmode * 9) || p == 19 + (tmode * 9)) {
if (!mmode) {
strip.setPixelColor(p, strip.Color(3, 2 * digitalRead(14), 2 * digitalRead(15)));
}
} else if ((b4) && (p == 4 || p == 14 || p == 24)) {
strip.setPixelColor(p, strip.Color(0, 3, 3));
} else {
strip.setPixelColor(p, strip.Color(0, 0, 0));
}
}
if (tmode && pup) {
strip.setPixelColor(1, strip.Color(3, 0, 0));
strip.setPixelColor(27, strip.Color(3, 0, 0));
}
if (mmode) {
if (smode) {
strip.setPixelColor(9 + (mx / 2) + (my / 2), strip.Color(0, 0, 3));
strip.setPixelColor(19 + (mx / 2) - (my / 2), strip.Color(0, 0, 3));
} else {
strip.setPixelColor(9 + (mx / 2) + (my / 2), strip.Color(0, 3, 0));
strip.setPixelColor(19 + (mx / 2) - (my / 2), strip.Color(0, 3, 0));
}
}
strip.show();
}
}
}
}
void touch() {
int tt1 = analogRead(A9);
int tt2 = analogRead(A9);
int tt3 = analogRead(A9);
int t1 = (1023 - ((tt1 + tt2 + tt3) / 3)) - 566;
if (t1 < 0) {
t1 = 0;
}
touch1 = (t1 / 2);
if ((touch1 < tcheck1 - tfilter) || (touch1 > tcheck1 + tfilter)) {
if (touch1 > 127) {
touch1 = 127;
}
if (mmode) {
my = 0;
if ((touch1 < 53) && (touch1 > 20)) {
my = -((53 - touch1) / 4);
}
if (touch1 > 73) {
my = ((touch1 - 72) / 4);
}
if (smode) {
if ((touch1 < 53) && (touch1 > 20)) {
Mouse.move(0, 0, -1 - (sb * 4));
delay(100);
}
if (touch1 > 73) {
Mouse.move(0, 0, 1 + (sb * 2));
delay(100);
}
} else {
Mouse.move(0, my * ((sb * 2) + 1), 0);
}
} else if (tmode) {
controlChange(channel, space + 70, touch1);
} else {
controlChange(channel, space + ct1, touch1);
}
tcheck1 = touch1;
stripn();
}
int tu1 = analogRead(A10);
int tu2 = analogRead(A10);
int tu3 = analogRead(A10);
int t2 = (1023 - ((tu1 + tu2 + tu3) / 3)) - 566;
if (t2 < 0) {
t2 = 0;
}
touch2 = (t2 / 2);
if ((touch2 < tcheck2 - tfilter) || (touch2 > tcheck2 + tfilter)) {
if (touch2 > 127) {
touch2 = 127;
}
if (mmode) {
mx = 0;
if ((touch2 < 53) && (touch2 > 20)) {
mx = -((53 - touch2) / 5);
}
if (touch2 > 73) {
mx = ((touch2 - 72) / 5);
}
if (smode) {
if ((touch2 < 53) && (touch2 > 20)) {
Keyboard.press(0x81);
Mouse.move(0, 0, -1 - (sb * 4));
Keyboard.release(0x81);
delay(100);
}
if (touch2 > 73) {
Keyboard.press(0x81);
Mouse.move(0, 0, 1 + (sb * 2));
Keyboard.release(0x81);
delay(100);
}
} else {
Mouse.move(mx * ((sb * 3) + 1), 0, 0);
}
} else if (tmode) {
if (pup) {
pitchBendChange(channel, map(touch2, 0, 127, 8192, 16383));
} else {
pitchBendChange(channel, map(touch2, 0, 127, 8192, 9524));
}
} else {
controlChange(channel, space + ct2, touch2);
}
tcheck2 = touch2;
stripn();
}
}
void stripn() {
strip.clear();
if (mmode) {
if (smode) {
strip.setPixelColor(9 + (mx / 2) + (my / 2), strip.Color(0, 0, 3));
strip.setPixelColor(19 + (mx / 2) - (my / 2), strip.Color(0, 0, 3));
} else {
strip.setPixelColor(9 + (mx / 2) + (my / 2), strip.Color(0, 3, 0));
strip.setPixelColor(19 + (mx / 2) - (my / 2), strip.Color(0, 3, 0));
}
} else {
int d1;
int d2;
int d3;
for (int p = 0; p < 9; p++) {
if (p < 5) {
d1 = (distchange / 3) - (200 - 50 * p);
d2 = (distchange2 / 3) - (200 - 50 * p);
d3 = (distchange3 / 3) - (200 - 50 * p);
} else {
d1 = (distchange / 3) - (50 * (p - 4));
d2 = (distchange2 / 3) - (50 * (p - 4));
d3 = (distchange3 / 3) - (50 * (p - 4));
}
if (d1 > 255) d1 = 255;
if (d2 > 255) d2 = 255;
if (d3 > 255) d3 = 255;
if (d1 < 0) d1 = 0;
if (d2 < 0) d2 = 0;
if (d3 < 0) d3 = 0;
strip.setPixelColor(p, strip.Color(random(d1), random(d1), random(d1)));
strip.setPixelColor(p + 10, strip.Color(random(d2), random(d2), random(d2)));
strip.setPixelColor(p + 20, strip.Color(random(d3), random(d3), random(d3)));
}
strip.setPixelColor(9 - (tmode * 9), strip.Color(3, 2 * digitalRead(14), 2 * digitalRead(15)));
strip.setPixelColor(19 + (tmode * 9), strip.Color(3, 2 * digitalRead(14), 2 * digitalRead(15)));
if (tcheck1 != 0) {
strip.setPixelColor(29 - tcheck1 / 4, strip.Color(0, 64, 0));
}
if (tcheck2 != 0) {
strip.setPixelColor(29 - tcheck2 / 4, strip.Color(0, 64, 0));
}
}
if (b4) {
strip.setPixelColor(4, strip.Color(0, 3, 3));
strip.setPixelColor(14, strip.Color(0, 3, 3));
strip.setPixelColor(24, strip.Color(0, 3, 3));
}
if (tmode && pup) {
strip.setPixelColor(1, strip.Color(3, 0, 0));
strip.setPixelColor(27, strip.Color(3, 0, 0));
}
strip.show();
}
