first test arduino sketch

KiCad/0004-DenshaBekutoru/0004-DenshaBekutoru.kicad_sch

@@ -6,7 +6,7 @@
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 	(title_block
 		(title "DenshaBekutoru 電車ベクトル (Train Vector)")
-		(date "2025-11-02")
+		(date "2025-11-10")
 		(rev "#001")
 		(company "ToGo-Lab")
 		(comment 1 "- https://togo-lab.io/")
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firmware/ArduinoTest/VoltagePinOCCheck_V01/VoltagePinOCCheck_V01.ino

@@ -0,0 +1,58 @@
+/*
+  0004_DenshaBekutoru ? Optocoupler Averaging Test (UNO)
+
+  Measures average voltage on:
+   - A2 -> later ATtiny85 PB3 (XTAL1, Pin 2)
+   - A3 -> later ATtiny85 PB4 (XTAL2, Pin 3)
+
+  Integration window is configurable via SAMPLE_WINDOW_MS.
+
+  by tgohle, last edit 20260111
+ 
+*/
+
+const unsigned long SAMPLE_WINDOW_MS = 100;   // change here
+const unsigned long SAMPLE_DELAY_US  = 500;   // delay between ADC samples
+
+const uint8_t ADC_PIN_1 = A2;  // UNO A2  -> later ATtiny85 PB3 (XTAL1, Pin 2)
+const uint8_t ADC_PIN_2 = A3;  // UNO A3  -> later ATtiny85 PB4 (XTAL2, Pin 3)
+
+void setup() {
+  Serial.begin(115200);
+
+  pinMode(ADC_PIN_1, INPUT);
+  pinMode(ADC_PIN_2, INPUT);
+
+  Serial.println("=== DenshaBekutoru Optocoupler Average Test ===");
+}
+
+void loop() {
+  unsigned long startTime = millis();
+
+  unsigned long sum1 = 0;
+  unsigned long sum2 = 0;
+  unsigned long samples = 0;
+
+  while (millis() - startTime < SAMPLE_WINDOW_MS) {
+    sum1 += analogRead(ADC_PIN_1);
+    sum2 += analogRead(ADC_PIN_2);
+    samples++;
+    delayMicroseconds(SAMPLE_DELAY_US);
+  }
+
+  float avg1 = (float)sum1 / samples;
+  float avg2 = (float)sum2 / samples;
+
+  float v1 = avg1 * (5.0 / 1023.0);
+  float v2 = avg2 * (5.0 / 1023.0);
+
+  Serial.print("A2 for PB3  XTAL1, Pin2: ");
+  Serial.print(v1, 3);
+  Serial.print(" V   |   ");
+
+  Serial.print("A3 for PB4 XTAL2, Pin3: ");
+  Serial.print(v2, 3);
+  Serial.println(" V");
+
+  delay(300);
+}