From cb3a07bb2559e39b67869fab8e8ab4927f722227 Mon Sep 17 00:00:00 2001
From: Liz <liz@adafruit.com>
Date: Tue, 15 Jul 2025 08:20:39 -0400
Subject: [PATCH] adding ideal diode examples

---
 .../.uno.test.only                            |  0
 .../Arduino_Ideal_Diode_Monitor.ino           | 45 +++++++++++++++++++
 .../CircuitPython_Ideal_Diode_Monitor/code.py | 33 ++++++++++++++
 3 files changed, 78 insertions(+)
 create mode 100644 Ideal_Diode_Examples/Arduino_Ideal_Diode_Monitor/.uno.test.only
 create mode 100644 Ideal_Diode_Examples/Arduino_Ideal_Diode_Monitor/Arduino_Ideal_Diode_Monitor.ino
 create mode 100644 Ideal_Diode_Examples/CircuitPython_Ideal_Diode_Monitor/code.py

diff --git a/Ideal_Diode_Examples/Arduino_Ideal_Diode_Monitor/.uno.test.only b/Ideal_Diode_Examples/Arduino_Ideal_Diode_Monitor/.uno.test.only
new file mode 100644
index 000000000..e69de29bb
diff --git a/Ideal_Diode_Examples/Arduino_Ideal_Diode_Monitor/Arduino_Ideal_Diode_Monitor.ino b/Ideal_Diode_Examples/Arduino_Ideal_Diode_Monitor/Arduino_Ideal_Diode_Monitor.ino
new file mode 100644
index 000000000..a4ad0e162
--- /dev/null
+++ b/Ideal_Diode_Examples/Arduino_Ideal_Diode_Monitor/Arduino_Ideal_Diode_Monitor.ino
@@ -0,0 +1,45 @@
+// SPDX-FileCopyrightText: 2025 Liz Clark for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+// LM73100 IMON Current Monitoring
+
+const int IMON_PIN = A0;           // IMON connected to analog pin A0
+const float RIMON = 1500.0;        // RIMON resistor value in ohms (1.5kΩ)
+const float GIMON = 2.5;           // GIMON typical value in μA/A (from datasheet, typical is 2.5)
+const float VREF = 5.0;            // Arduino reference voltage (5V for most Arduinos)
+const int ADC_RESOLUTION = 1024;
+
+void setup() {
+  Serial.begin(9600);
+  pinMode(IMON_PIN, INPUT);
+  
+  Serial.println("LM73100 Current Monitor Started");
+  Serial.println("================================");
+  Serial.print("RIMON: ");
+  Serial.print(RIMON);
+  Serial.println(" ohms");
+  Serial.print("GIMON: ");
+  Serial.print(GIMON);
+  Serial.println(" μA/A");
+  Serial.println("================================\n");
+}
+
+void loop() {
+  int adcValue = analogRead(IMON_PIN);
+  float vimon = (adcValue * VREF) / ADC_RESOLUTION;
+  float iout_A = vimon / (RIMON * GIMON);
+  float iout_mA = iout_A * 1000.0;
+
+  Serial.print("ADC Value: ");
+  Serial.print(adcValue);
+  Serial.print(" | VIMON: ");
+  Serial.print(vimon, 3);
+  Serial.print(" V | Output Current: ");
+  Serial.print(iout_mA, 2);
+  Serial.print(" mA (");
+  Serial.print(iout_A, 3);
+  Serial.println(" A)");
+  
+  delay(500);  // Read every 500ms
+}
diff --git a/Ideal_Diode_Examples/CircuitPython_Ideal_Diode_Monitor/code.py b/Ideal_Diode_Examples/CircuitPython_Ideal_Diode_Monitor/code.py
new file mode 100644
index 000000000..d9c98cce9
--- /dev/null
+++ b/Ideal_Diode_Examples/CircuitPython_Ideal_Diode_Monitor/code.py
@@ -0,0 +1,33 @@
+# SPDX-FileCopyrightText: 2025 Liz Clark for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+# LM73100 IMON Current Monitoring
+
+import time
+import board
+from analogio import AnalogIn
+
+RIMON = 1500.0 # 1.5kΩ
+GIMON = 2.5 # μA/A
+analog_in = AnalogIn(board.A0)
+
+def get_voltage(pin):
+    return (pin.value * 3.3) / 65536
+
+print("LM73100 Current Monitor Started")
+print("================================")
+print(f"RIMON: {RIMON} ohms")
+print(f"GIMON: {GIMON} μA/A")
+print("================================\n")
+
+while True:
+    # Read voltage from IMON pin
+    vimon = get_voltage(analog_in)
+
+    # Calculate output current
+    iout_A = vimon / (RIMON * GIMON)
+    iout_mA = iout_A * 1000.0
+
+    print(f"ADC: {analog_in.value} | VIMON: {vimon:.3f}V | Current: {iout_mA:.2f} mA")
+
+    time.sleep(0.5)