snowflake

projects/snowflake/README.md

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+---
+name: "Mohid"
+slack_handle: "@m0.hid"
+github_handle: "@M0HID"
+tutorial: N/A
+wokwi: "https://wokwi.com/projects/418889150108342273"
+---
+
+# Snowflake
+
+This is my snowflake design for Hacky Holidays. It consists of a button, 48 WS2812B LEDs and a XIAO ESP32C3.
+
+This should cost around $30 including PCB manufacture, shipping and parts. I will be soldering everything myself to save on PCBa costs.
+
+The code can be viewed [here](https://wokwi.com/projects/418889150108342273) which shows a chasing LED effect
+
+Here are some pictures:
+![image](https://github.com/user-attachments/assets/ad405bdd-c9ca-421a-99f4-8ff4ff19b22f)
+![image](https://github.com/user-attachments/assets/20daac57-dd1c-4790-9447-e19dfaaa545a)

projects/snowflake/code.ino

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+#include <Adafruit_NeoPixel.h>
+
+#define PIN            3          
+#define NUM_PIXELS     64         
+#define DELAY_TIME     100        
+#define TRAIL_LENGTH   10         
+#define BUTTON_PIN      2
+
+Adafruit_NeoPixel strip(NUM_PIXELS, PIN, NEO_GRB + NEO_KHZ800);
+
+int snakePos = 0;  
+int tailPos = -1;  
+bool direction = true;
+
+unsigned long lastButtonPress = 0;
+unsigned long debounceDelay = 200;
+
+void setup() {
+  strip.begin();
+  strip.show();
+  pinMode(BUTTON_PIN, INPUT_PULLUP);
+  Serial.begin(9600);
+}
+
+void loop() {
+  strip.clear();
+  strip.setPixelColor(snakePos, strip.Color(66, 227, 245));
+
+  if (tailPos != -1) {
+    for (int i = 0; i < TRAIL_LENGTH; i++) {
+      int trailIndex = tailPos - i;
+      if (trailIndex >= 0 && trailIndex < NUM_PIXELS) {
+        int brightness = map(i, 0, TRAIL_LENGTH - 1, 255, 0);
+        strip.setPixelColor(trailIndex, strip.Color(66 * brightness / 255, 227 * brightness / 255, 245 * brightness / 255));
+      }
+    }
+  }
+
+  strip.show();
+
+  if (direction) {
+    tailPos = snakePos;  
+    snakePos++;  
+
+    if (snakePos >= NUM_PIXELS) {
+      snakePos = 0;  
+      tailPos = -1;  
+    }
+  } else {
+    tailPos = snakePos;  
+    snakePos--;  
+
+    if (snakePos < 0) {
+      snakePos = NUM_PIXELS - 1;  
+      tailPos = -1;  
+    }
+  }
+
+  if (digitalRead(BUTTON_PIN) == LOW && (millis() - lastButtonPress) > debounceDelay) {
+    direction = !direction;  
+    lastButtonPress = millis();  
+    Serial.println("Button Pressed");
+  }
+
+  delay(DELAY_TIME);
+}
+

projects/snowflake/production/bom.csv

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+Designator,Footprint,Quantity,Value,LCSC Part #
+"D1, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D2, D20, D21, D22, D23, D24, D25, D26, D27, D28, D29, D3, D30, D31, D32, D33, D34, D35, D36, D37, D38, D39, D4, D40, D41, D42, D43, D44, D45, D46, D47, D48, D5, D6, D7, D8, D9",LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm,48,WS2812B,
+SW1,SW_PUSH_6mm,1,SW_Push,
+U1,XIAO-ESP32S3-SMD,1,XIAO-ESP32-C3-SMD,

projects/snowflake/production/designators.csv

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+D1:1
+D10:1
+D11:1
+D12:1
+D13:1
+D14:1
+D15:1
+D16:1
+D17:1
+D18:1
+D19:1
+D2:1
+D20:1
+D21:1
+D22:1
+D23:1
+D24:1
+D25:1
+D26:1
+D27:1
+D28:1
+D29:1
+D3:1
+D30:1
+D31:1
+D32:1
+D33:1
+D34:1
+D35:1
+D36:1
+D37:1
+D38:1
+D39:1
+D4:1
+D40:1
+D41:1
+D42:1
+D43:1
+D44:1
+D45:1
+D46:1
+D47:1
+D48:1
+D5:1
+D6:1
+D7:1
+D8:1
+D9:1
+REF**:1
+SW1:1
+U1:1

projects/snowflake/production/positions.csv

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+Designator,Mid X,Mid Y,Rotation,Layer
+D1,128.0,-171.5,225.0,top
+D10,161.5,-136.0,270.0,top
+D11,126.5,-101.5,270.0,top
+D12,146.0,-101.5,90.0,top
+D13,176.0,-123.5,225.0,top
+D14,165.5,-101.5,270.0,top
+D15,185.5,-101.5,270.0,top
+D16,176.0,-79.5,315.0,top
+D17,120.75,-87.25,315.0,top
+D18,134.5,-73.5,135.0,top
+D19,162.0,-67.0,270.0,top
+D2,106.0,-149.5,180.0,top
+D20,146.5,-61.5,315.0,top
+D21,158.0,-50.0,315.0,top
+D22,141.0,-46.0,0.0,top
+D23,106.0,-81.5,0.0,top
+D24,106.0,-62.0,180.0,top
+D25,127.736952,-31.763052,315.0,top
+D26,106.0,-42.5,0.0,top
+D27,106.0,-28.5,0.0,top
+D28,84.5,-32.0,45.0,top
+D29,92.25,-87.25,45.0,top
+D3,106.0,-141.0,180.0,top
+D30,78.5,-73.5,225.0,top
+D31,72.0,-46.0,0.0,top
+D32,66.5,-61.5,45.0,top
+D33,55.0,-50.0,45.0,top
+D34,51.5,-67.0,90.0,top
+D35,86.5,-101.5,90.0,top
+D36,67.0,-101.5,270.0,top
+D37,36.8,-80.2,45.0,top
+D38,47.5,-101.5,90.0,top
+D39,27.5,-101.5,90.0,top
+D4,106.0,-121.5,180.0,top
+D40,36.8,-122.8,135.0,top
+D41,92.25,-115.75,135.0,top
+D42,78.5,-129.5,315.0,top
+D43,51.2,-136.0,90.0,top
+D44,66.5,-141.5,135.0,top
+D45,55.0,-153.0,135.0,top
+D46,72.0,-156.8,180.0,top
+D47,106.5,-101.5,180.0,top
+D48,84.4,-171.0,315.0,top
+D5,120.642135,-115.642136,225.0,top
+D6,134.5,-129.5,45.0,top
+D7,141.0,-156.5,180.0,top
+D8,146.5,-141.5,225.0,top
+D9,158.0,-153.0,225.0,top
+SW1,106.0,-130.5,0.0,top
+U1,105.978864,-167.884,180.0,top

projects/snowflake/src/BOM.csv

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+Name,LCSC P#,qty
+WS2812B,C114586,48
+XIAO ESP32-C3,N/A,1