Makeup for cyber Cinderella. Arduino project of the day off. LED eyelashes

For the first time, LED eyelashes were shown by designer Chien Fam at The Maker Faire in San Francisco. It was two years ago. Well, almost immediately in the Alibaba cave, the Chinese robbers began to distribute analogs for 400 or even 300 rubles.

In the pictures, these are two thin printed circuit boards with twelve LEDs that are connected to the control board with a battery by thin cables. Luminous eyelashes are attached with a special glue over ordinary or overhead, and the controller and battery are hidden in the hair. Technically, at first glance, nothing complicated. But! If you look at the plate-eyelash 12 LEDs, and in the loop only three wires. At the same time, the LEDs not only glow or blink, but also work as running lights. I racked my brains for half a day like they did. Reviewed a bunch of commercials. And, with slow viewing, it turned out that any effect of the LEDs is performed in pairs. That is, the task immediately narrowed to control the six LEDs on three wires. But still for three! Six in three! Once again - six by three. And yet ... Then I repeated it again and the answer somehow surfaced by itself. Here it is - the number of all permutations of the three elements is 6!

It turns out the microcontroller goes through the loop, consisting of three conductors, three signals: zero, one and the third state. We get six combinations / permutations, which means that at each of the permutations one of the six LEDs is lit. If they are included according to this scheme:

For example, let's light the D2 LED. On A-zero, on B - the third state, on C-unit. Only the D2 LED is on!

Now further. Zero and one at the outputs of the microcontroller is easy. And the third state? Even easier. Set the mode “input”. Now the high-impedance input, which is not tightened to either zero or one, is practically disconnected from the control circuit.

Next is a matter of code, dynamically controlling the outputs of the microcontroller, turn on any number of LEDs. We make running lights, blink, sparkle, extinguish in the end.
Below is the code for an Arduino with multiple effects for two eyelashes with six groups of LEDs each.

Open and look

#include <PinChangeInt.h> #define LEFT_PIN_1 2 #define LEFT_PIN_2 3 #define LEFT_PIN_3 4 #define RIGHT_PIN_1 5 #define RIGHT_PIN_2 6 #define RIGHT_PIN_3 7 #define KEY_PIN 8 #define EFFECT_0 0 #define EFFECT_1 1 #define EFFECT_2 2 #define EFFECT_3 3 #define EFFECT_4 4 #define EFFECT_5 5 #define EFFECT_6 6 #define EFFECT_7 7 #define EFFECT_LAST EFFECT_7 uint8_t EffectCnt = 0; void setup() { pinMode(LEFT_PIN_1, OUTPUT); pinMode(LEFT_PIN_2, OUTPUT); pinMode(LEFT_PIN_3, OUTPUT); pinMode(RIGHT_PIN_1, OUTPUT); pinMode(RIGHT_PIN_2, OUTPUT); pinMode(RIGHT_PIN_3, OUTPUT); pinMode(KEY_PIN, INPUT); digitalWrite(KEY_PIN, HIGH); PCintPort::attachInterrupt(KEY_PIN, &Key_ISR, FALLING); } //------------------------------------------------------ void loop() { void (*EFFECTS[])(void) = { Lashes_0, Lashes_1, Lashes_2, Lashes_3, Lashes_4, Lashes_5, Lashes_6, Lashes_7, }; (*EFFECTS[EffectCnt])();//EffectCnt delay(100); Lashes_Off(); while(!digitalRead(KEY_PIN)); delay(300); PCintPort::attachInterrupt(KEY_PIN, &Key_ISR, FALLING); } //------------------------------------------------------ void Lashes_0() { const uint16_t ViewDelay = 5; while(EffectCnt == EFFECT_0) { digitalWrite(LEFT_PIN_1, HIGH); digitalWrite(LEFT_PIN_2, LOW); digitalWrite(LEFT_PIN_3, HIGH); digitalWrite(RIGHT_PIN_1, HIGH); digitalWrite(RIGHT_PIN_2, LOW); digitalWrite(RIGHT_PIN_3, HIGH); delay(ViewDelay); digitalWrite(LEFT_PIN_2, HIGH); digitalWrite(LEFT_PIN_3, LOW); digitalWrite(RIGHT_PIN_2, HIGH); digitalWrite(RIGHT_PIN_3, LOW); delay(ViewDelay); digitalWrite(LEFT_PIN_1, LOW); digitalWrite(LEFT_PIN_3, HIGH); digitalWrite(RIGHT_PIN_1, LOW); digitalWrite(RIGHT_PIN_3, HIGH); delay(ViewDelay); } } //------------------------------------------------------ void Lashes_1() { const uint16_t ViewDelay = 5; const uint8_t LashesON = 27; const uint16_t PauseDelay = ViewDelay * LashesON * 3; while(EffectCnt == EFFECT_1) { for (uint8_t i = 0; i < LashesON; i++) { digitalWrite(LEFT_PIN_1, HIGH); digitalWrite(LEFT_PIN_2, LOW); digitalWrite(LEFT_PIN_3, HIGH); digitalWrite(RIGHT_PIN_1, HIGH); digitalWrite(RIGHT_PIN_2, LOW); digitalWrite(RIGHT_PIN_3, HIGH); delay(ViewDelay); digitalWrite(LEFT_PIN_2, HIGH); digitalWrite(LEFT_PIN_3, LOW); digitalWrite(RIGHT_PIN_2, HIGH); digitalWrite(RIGHT_PIN_3, LOW); delay(ViewDelay); digitalWrite(LEFT_PIN_1, LOW); digitalWrite(LEFT_PIN_3, HIGH); digitalWrite(RIGHT_PIN_1, LOW); digitalWrite(RIGHT_PIN_3, HIGH); delay(ViewDelay); } Lashes_Off(); delay(PauseDelay); } } //------------------------------------------------------ void Lashes_2() { const uint16_t ViewDelay = 5; const uint8_t LashesON = 17; while(EffectCnt == EFFECT_2) { for (uint8_t i = 0; i < LashesON; i++) { digitalWrite(RIGHT_PIN_1, HIGH); digitalWrite(RIGHT_PIN_2, LOW); digitalWrite(RIGHT_PIN_3, HIGH); delay(ViewDelay); digitalWrite(RIGHT_PIN_2, HIGH); digitalWrite(RIGHT_PIN_3, LOW); delay(ViewDelay); digitalWrite(RIGHT_PIN_1, LOW); digitalWrite(RIGHT_PIN_3, HIGH); delay(ViewDelay); } Lashes_Off(); for (uint8_t i = 0; i < LashesON; i++) { digitalWrite(LEFT_PIN_1, HIGH); digitalWrite(LEFT_PIN_2, LOW); digitalWrite(LEFT_PIN_3, HIGH); delay(ViewDelay); digitalWrite(LEFT_PIN_2, HIGH); digitalWrite(LEFT_PIN_3, LOW); delay(ViewDelay); digitalWrite(LEFT_PIN_1, LOW); digitalWrite(LEFT_PIN_3, HIGH); delay(ViewDelay); } Lashes_Off(); } } //------------------------------------------------------ void Lashes_3() { const uint16_t ViewDelay = 70; pinMode(LEFT_PIN_1, OUTPUT); pinMode(RIGHT_PIN_1, OUTPUT); pinMode(LEFT_PIN_2, INPUT); pinMode(RIGHT_PIN_2, INPUT); pinMode(LEFT_PIN_3, OUTPUT); pinMode(RIGHT_PIN_3, OUTPUT); while(EffectCnt == EFFECT_3) { digitalWrite(LEFT_PIN_1, HIGH); digitalWrite(RIGHT_PIN_1, HIGH); digitalWrite(LEFT_PIN_3, LOW); digitalWrite(RIGHT_PIN_3, LOW); delay(ViewDelay); digitalWrite(LEFT_PIN_1, LOW); digitalWrite(RIGHT_PIN_1, LOW); digitalWrite(LEFT_PIN_3, HIGH); digitalWrite(RIGHT_PIN_3, HIGH); delay(ViewDelay); pinMode(LEFT_PIN_1, INPUT); pinMode(RIGHT_PIN_1, INPUT); pinMode(LEFT_PIN_2, OUTPUT); pinMode(RIGHT_PIN_2, OUTPUT); digitalWrite(LEFT_PIN_2, HIGH); digitalWrite(RIGHT_PIN_2, HIGH); digitalWrite(LEFT_PIN_3, LOW); digitalWrite(RIGHT_PIN_3, LOW); delay(ViewDelay); digitalWrite(LEFT_PIN_2, LOW); digitalWrite(RIGHT_PIN_2, LOW); digitalWrite(LEFT_PIN_3, HIGH); digitalWrite(RIGHT_PIN_3, HIGH); delay(ViewDelay); pinMode(LEFT_PIN_3, INPUT); pinMode(RIGHT_PIN_3, INPUT); pinMode(LEFT_PIN_1, OUTPUT); pinMode(RIGHT_PIN_1, OUTPUT); digitalWrite(LEFT_PIN_1, HIGH); digitalWrite(RIGHT_PIN_1, HIGH); digitalWrite(LEFT_PIN_2, LOW); digitalWrite(RIGHT_PIN_2, LOW); delay(ViewDelay); digitalWrite(LEFT_PIN_1, LOW); digitalWrite(RIGHT_PIN_1, LOW); digitalWrite(LEFT_PIN_2, HIGH); digitalWrite(RIGHT_PIN_2, HIGH); //  delay(ViewDelay); digitalWrite(LEFT_PIN_1, HIGH); digitalWrite(RIGHT_PIN_1, HIGH); digitalWrite(LEFT_PIN_2, LOW); digitalWrite(RIGHT_PIN_2, LOW); delay(ViewDelay); pinMode(LEFT_PIN_1, INPUT); pinMode(RIGHT_PIN_1, INPUT); pinMode(LEFT_PIN_3, OUTPUT); pinMode(RIGHT_PIN_3, OUTPUT); digitalWrite(LEFT_PIN_3, HIGH); digitalWrite(RIGHT_PIN_3, HIGH); delay(ViewDelay); digitalWrite(LEFT_PIN_2, HIGH); digitalWrite(RIGHT_PIN_2, HIGH); digitalWrite(LEFT_PIN_3, LOW); digitalWrite(RIGHT_PIN_3, LOW); delay(ViewDelay); pinMode(LEFT_PIN_2, INPUT); pinMode(RIGHT_PIN_2, INPUT); pinMode(LEFT_PIN_1, OUTPUT); pinMode(RIGHT_PIN_1, OUTPUT); digitalWrite(LEFT_PIN_1, LOW); digitalWrite(RIGHT_PIN_1, LOW); digitalWrite(LEFT_PIN_3, HIGH); digitalWrite(RIGHT_PIN_3, HIGH); } } //------------------------------------------------------ void Lashes_4() { const uint16_t ViewDelay = 30; randomSeed(analogRead(0)); while(EffectCnt == EFFECT_4) { uint8_t randNumber = random(0, 7); switch(randNumber) { case 0: digitalWrite(LEFT_PIN_1, HIGH); digitalWrite(LEFT_PIN_3, HIGH); break; case 1: digitalWrite(RIGHT_PIN_1, HIGH); digitalWrite(RIGHT_PIN_3, HIGH); break; case 2: digitalWrite(LEFT_PIN_1, HIGH); digitalWrite(LEFT_PIN_2, HIGH); break; case 3: digitalWrite(RIGHT_PIN_1, HIGH); digitalWrite(RIGHT_PIN_2, HIGH); break; case 4: digitalWrite(LEFT_PIN_2, HIGH); digitalWrite(LEFT_PIN_3, HIGH); break; case 5: digitalWrite(RIGHT_PIN_2, HIGH); digitalWrite(RIGHT_PIN_3, HIGH); break; } delay(ViewDelay); Lashes_Off(); } } //------------------------------------------------------ void Lashes_5() { const uint8_t DelayMin = 1; const uint8_t DelayMax = 25; const uint8_t LashesON = 6; int8_t DelayVal = DelayMin; bool Direction = false; while(EffectCnt == EFFECT_5) { for (uint8_t i = 0; i < LashesON; i++) { digitalWrite(LEFT_PIN_1, HIGH); digitalWrite(LEFT_PIN_2, LOW); digitalWrite(LEFT_PIN_3, HIGH); digitalWrite(RIGHT_PIN_1, HIGH); digitalWrite(RIGHT_PIN_2, LOW); digitalWrite(RIGHT_PIN_3, HIGH); delay(DelayVal); digitalWrite(LEFT_PIN_2, HIGH); digitalWrite(LEFT_PIN_3, LOW); digitalWrite(RIGHT_PIN_2, HIGH); digitalWrite(RIGHT_PIN_3, LOW); delay(DelayVal); digitalWrite(LEFT_PIN_1, LOW); digitalWrite(LEFT_PIN_3, HIGH); digitalWrite(RIGHT_PIN_1, LOW); digitalWrite(RIGHT_PIN_3, HIGH); delay(DelayVal); } if (!Direction) { DelayVal++; if (DelayVal == DelayMax + 1) { DelayVal = DelayMax - 1; Direction = true; } } else { DelayVal--; if (DelayVal == DelayMin - 1) { DelayVal = DelayMin + 1; Direction = false; } } } } //------------------------------------------------------ void Lashes_6() { const uint16_t ViewDelay = 5; const uint8_t LashesON_RED = 45; const uint8_t LashesON_RED_BLUE = LashesON_RED; pinMode(LEFT_PIN_1, OUTPUT); pinMode(RIGHT_PIN_1, OUTPUT); pinMode(LEFT_PIN_2, INPUT); pinMode(RIGHT_PIN_2, INPUT); pinMode(LEFT_PIN_3, OUTPUT); pinMode(RIGHT_PIN_3, OUTPUT); for (uint8_t i = 0; i < LashesON_RED; i++) { digitalWrite(LEFT_PIN_1, HIGH); digitalWrite(RIGHT_PIN_1, HIGH); digitalWrite(LEFT_PIN_3, LOW); digitalWrite(RIGHT_PIN_3, LOW); delay(ViewDelay); digitalWrite(LEFT_PIN_1, LOW); digitalWrite(RIGHT_PIN_1, LOW); digitalWrite(LEFT_PIN_3, HIGH); digitalWrite(RIGHT_PIN_3, HIGH); delay(ViewDelay); } for (uint8_t i = 0; i < LashesON_RED_BLUE; i++) { pinMode(LEFT_PIN_1, OUTPUT); pinMode(RIGHT_PIN_1, OUTPUT); pinMode(LEFT_PIN_2, INPUT); pinMode(RIGHT_PIN_2, INPUT); pinMode(LEFT_PIN_3, OUTPUT); pinMode(RIGHT_PIN_3, OUTPUT); digitalWrite(LEFT_PIN_1, HIGH); digitalWrite(RIGHT_PIN_1, HIGH); digitalWrite(LEFT_PIN_3, LOW); digitalWrite(RIGHT_PIN_3, LOW); delay(ViewDelay); digitalWrite(LEFT_PIN_1, LOW); digitalWrite(RIGHT_PIN_1, LOW); digitalWrite(LEFT_PIN_3, HIGH); digitalWrite(RIGHT_PIN_3, HIGH); delay(ViewDelay); pinMode(LEFT_PIN_1, INPUT); pinMode(RIGHT_PIN_1, INPUT); pinMode(LEFT_PIN_2, OUTPUT); pinMode(RIGHT_PIN_2, OUTPUT); digitalWrite(LEFT_PIN_2, HIGH); digitalWrite(RIGHT_PIN_2, HIGH); digitalWrite(LEFT_PIN_3, LOW); digitalWrite(RIGHT_PIN_3, LOW); delay(ViewDelay); digitalWrite(LEFT_PIN_2, LOW); digitalWrite(RIGHT_PIN_2, LOW); digitalWrite(LEFT_PIN_3, HIGH); digitalWrite(RIGHT_PIN_3, HIGH); delay(ViewDelay); } pinMode(LEFT_PIN_1, OUTPUT); pinMode(RIGHT_PIN_1, OUTPUT); while(EffectCnt == EFFECT_6) { digitalWrite(LEFT_PIN_1, HIGH); digitalWrite(LEFT_PIN_2, LOW); digitalWrite(LEFT_PIN_3, HIGH); digitalWrite(RIGHT_PIN_1, HIGH); digitalWrite(RIGHT_PIN_2, LOW); digitalWrite(RIGHT_PIN_3, HIGH); delay(ViewDelay); digitalWrite(LEFT_PIN_2, HIGH); digitalWrite(LEFT_PIN_3, LOW); digitalWrite(RIGHT_PIN_2, HIGH); digitalWrite(RIGHT_PIN_3, LOW); delay(ViewDelay); digitalWrite(LEFT_PIN_1, LOW); digitalWrite(LEFT_PIN_3, HIGH); digitalWrite(RIGHT_PIN_1, LOW); digitalWrite(RIGHT_PIN_3, HIGH); delay(ViewDelay); } } //------------------------------------------------------ void Lashes_7() { const uint16_t ViewDelay = 70; pinMode(LEFT_PIN_1, OUTPUT); pinMode(RIGHT_PIN_1, OUTPUT); pinMode(LEFT_PIN_2, INPUT); pinMode(RIGHT_PIN_3, INPUT); pinMode(LEFT_PIN_3, OUTPUT); pinMode(RIGHT_PIN_2, OUTPUT); while(EffectCnt == EFFECT_7) { digitalWrite(LEFT_PIN_1, HIGH); digitalWrite(LEFT_PIN_3, LOW); digitalWrite(RIGHT_PIN_1, LOW); digitalWrite(RIGHT_PIN_2, HIGH); delay(ViewDelay); digitalWrite(LEFT_PIN_1, LOW); digitalWrite(LEFT_PIN_3, HIGH); digitalWrite(RIGHT_PIN_1, HIGH); digitalWrite(RIGHT_PIN_2, LOW); delay(ViewDelay); pinMode(LEFT_PIN_1, INPUT); pinMode(LEFT_PIN_2, OUTPUT); digitalWrite(LEFT_PIN_2, HIGH); digitalWrite(LEFT_PIN_3, LOW); pinMode(RIGHT_PIN_1, INPUT); pinMode(RIGHT_PIN_3, OUTPUT); digitalWrite(RIGHT_PIN_3, HIGH); delay(ViewDelay); digitalWrite(LEFT_PIN_2, LOW); digitalWrite(LEFT_PIN_3, HIGH); digitalWrite(RIGHT_PIN_2, HIGH); digitalWrite(RIGHT_PIN_3, LOW); delay(ViewDelay); pinMode(LEFT_PIN_3, INPUT); pinMode(RIGHT_PIN_2, INPUT); pinMode(LEFT_PIN_1, OUTPUT); pinMode(RIGHT_PIN_1, OUTPUT); digitalWrite(LEFT_PIN_1, HIGH); digitalWrite(RIGHT_PIN_1, LOW); digitalWrite(LEFT_PIN_2, LOW); digitalWrite(RIGHT_PIN_3, HIGH); delay(ViewDelay); digitalWrite(LEFT_PIN_1, LOW); digitalWrite(RIGHT_PIN_1, HIGH); digitalWrite(LEFT_PIN_2, HIGH); digitalWrite(RIGHT_PIN_3, LOW); //  delay(ViewDelay); digitalWrite(LEFT_PIN_1, HIGH); digitalWrite(RIGHT_PIN_1, LOW); digitalWrite(LEFT_PIN_2, LOW); digitalWrite(RIGHT_PIN_3, HIGH); delay(ViewDelay); pinMode(LEFT_PIN_1, INPUT); pinMode(RIGHT_PIN_1, INPUT); pinMode(LEFT_PIN_3, OUTPUT); pinMode(RIGHT_PIN_2, OUTPUT); digitalWrite(LEFT_PIN_3, HIGH); digitalWrite(RIGHT_PIN_2, HIGH); digitalWrite(RIGHT_PIN_3, LOW); delay(ViewDelay); digitalWrite(LEFT_PIN_2, HIGH); digitalWrite(RIGHT_PIN_3, HIGH); digitalWrite(LEFT_PIN_3, LOW); digitalWrite(RIGHT_PIN_2, LOW); delay(ViewDelay); pinMode(LEFT_PIN_2, INPUT); pinMode(RIGHT_PIN_3, INPUT); pinMode(LEFT_PIN_1, OUTPUT); pinMode(RIGHT_PIN_1, OUTPUT); digitalWrite(LEFT_PIN_1, LOW); digitalWrite(RIGHT_PIN_1, HIGH); digitalWrite(LEFT_PIN_3, HIGH); } } //---------------------------------------- void Key_ISR() { EffectCnt++; if (EffectCnt > EFFECT_LAST) EffectCnt = EFFECT_0; PCintPort::detachInterrupt(KEY_PIN); } //---------------------------------------- void Lashes_Off() { pinMode(LEFT_PIN_1, OUTPUT); pinMode(LEFT_PIN_2, OUTPUT); pinMode(LEFT_PIN_3, OUTPUT); pinMode(RIGHT_PIN_1, OUTPUT); pinMode(RIGHT_PIN_2, OUTPUT); pinMode(RIGHT_PIN_3, OUTPUT); digitalWrite(LEFT_PIN_1, LOW); digitalWrite(LEFT_PIN_2, LOW); digitalWrite(LEFT_PIN_3, LOW); digitalWrite(RIGHT_PIN_1, LOW); digitalWrite(RIGHT_PIN_2, LOW); digitalWrite(RIGHT_PIN_3, LOW); }

And this girl Veronica demonstrates these effects.

Probably for someone this control method has long been familiar and you already use it. But still, really wanted to share. Arduinschiki should enjoy!

Source: https://habr.com/ru/post/414237/

All Articles

Makeup for cyber Cinderella. Arduino project of the day off. LED eyelashes

More articles: