From 5ac95f82ba7fb3e67b09b02d0f5be3d791da4562 Mon Sep 17 00:00:00 2001
From: Joseph Timothy Foley <foley@ru.is>
Date: Wed, 25 Feb 2026 18:30:44 +0100
Subject: [PATCH] Code for the PrimoWhip Arduino prototype

---
 .gitignore    |  2 ++
 primowhip.ino | 67 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 69 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 primowhip.ino

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..cce990e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+*!
+*~
diff --git a/primowhip.ino b/primowhip.ino
new file mode 100644
index 0000000..cf34b3f
--- /dev/null
+++ b/primowhip.ino
@@ -0,0 +1,67 @@
+#include <Arduino.h> // Include the Arduino library
+
+// Pin numbers defined
+const int pinD3 = 3;
+const int pinA1 = A1; // Define A1 pin as A1
+
+// Constants for ADC to current conversion
+const float referenceVoltage = 5.0;  //5V logic
+const int adcMax = 1023;    
+const float voltsToAmps = 1.0 / 1.2; // Conversion factor: 1A per 1.2V
+
+// Threshold current value in amperes
+const float currentThreshold = 1.1;
+const int consecutiveLimit = 3; // Number of consecutive readings needed to stop the motor
+
+void setup() {
+  // Initialize the serial communication
+  Serial.begin(9600);
+  
+  // Set pin D3 as an output to turn on and off cream whipper
+  pinMode(pinD3, OUTPUT);
+  
+  // Set pin D3 to HIGH (5V)
+  digitalWrite(pinD3, HIGH);
+  Serial.println("Pin D3 set to HIGH (5V)");
+
+  int consecutiveHighCurrent = 0; // Counter for consecutive high current readings
+
+  // 150-second countdown so cream whipper won't run forever if you put unwhippable liquids in it
+  for (int i = 150; i > 0; i--) {
+    // Read the value from A1
+    int adcValue = analogRead(pinA1);
+
+    // Convert ADC value to voltage
+    float voltage = (adcValue * referenceVoltage) / adcMax;
+
+    // Convert voltage to current
+    float current = voltage * voltsToAmps;
+
+    // Print countdown time and current value
+    Serial.print("Time left: ");
+    Serial.print(i);
+    Serial.print(" seconds, Current: ");
+    Serial.print(current);
+    Serial.println(" A");
+
+    // Check if current exceeds the threshold
+    if (current > currentThreshold) {
+      consecutiveHighCurrent++;
+    } else {
+      consecutiveHighCurrent = 0; // Reset counter if current is below threshold
+    }
+
+    // Stop the motor if the threshold is exceeded 3 times in a row
+    if (consecutiveHighCurrent >= consecutiveLimit) {
+      digitalWrite(pinD3, LOW);
+      Serial.println("Motor stopped due to high current!");
+      break; // Exit the countdown loop
+    }
+
+    delay(1000); // Wait 1 second
+  }
+  
+  // Ensure pin D3 is set to LOW (0V) at the end
+  digitalWrite(pinD3, LOW);
+  Serial.println("Pin D3 set to LOW (0V)");
+}