diff --git a/CircuitPython_Essentials/CircuitPython_I2C_Scan/code.py b/CircuitPython_Essentials/CircuitPython_I2C_Scan/code.py
index 6a19b8fb5..572895fb8 100644
--- a/CircuitPython_Essentials/CircuitPython_I2C_Scan/code.py
+++ b/CircuitPython_Essentials/CircuitPython_I2C_Scan/code.py
@@ -12,7 +12,8 @@ import time
 import board
 
 # To use default I2C bus (most boards)
-i2c = board.I2C()
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 
 # To create I2C bus on specific pins
 # import busio
diff --git a/CircuitPython_Essentials/CircuitPython_I2C_TSL2591/code.py b/CircuitPython_Essentials/CircuitPython_I2C_TSL2591/code.py
index 18912cd69..f6fc606fb 100644
--- a/CircuitPython_Essentials/CircuitPython_I2C_TSL2591/code.py
+++ b/CircuitPython_Essentials/CircuitPython_I2C_TSL2591/code.py
@@ -7,7 +7,8 @@ import time
 import board
 import adafruit_tsl2591
 
-i2c = board.I2C()
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 
 # Lock the I2C device before we try to scan
 while not i2c.try_lock():
diff --git a/CircuitPython_KeyPad_Calculator/code/code.py b/CircuitPython_KeyPad_Calculator/code/code.py
index 26c39de7b..45e91c5c7 100644
--- a/CircuitPython_KeyPad_Calculator/code/code.py
+++ b/CircuitPython_KeyPad_Calculator/code/code.py
@@ -55,7 +55,8 @@ displayio.release_displays()
 # oled_reset = board.D9
 
 # Use for I2C
-i2c = board.I2C()
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 display_bus = displayio.I2CDisplay(i2c, device_address=0x3C)
 
 # SH1107 is vertically oriented 64x128
diff --git a/CircuitPython_LED_Sand_Hourglass/double_matrix/code.py b/CircuitPython_LED_Sand_Hourglass/double_matrix/code.py
index ec245b5e9..93b00308b 100755
--- a/CircuitPython_LED_Sand_Hourglass/double_matrix/code.py
+++ b/CircuitPython_LED_Sand_Hourglass/double_matrix/code.py
@@ -10,12 +10,16 @@ import matrixsand
 
 DELAY = 0.00 # add some delay if you want
 
+# setup i2c
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
+
 # the accelo
-accelo = adafruit_lsm6ds.lsm6ds33.LSM6DS33(board.I2C())
+accelo = adafruit_lsm6ds.lsm6ds33.LSM6DS33(i2c)
 
 # the matrix
-matrix1 = matrix.Matrix8x8(board.I2C(), 0x70)
-matrix2 = matrix.Matrix8x8(board.I2C(), 0x71)
+matrix1 = matrix.Matrix8x8(i2c, 0x70)
+matrix2 = matrix.Matrix8x8(i2c, 0x71)
 
 # the sand
 sand = matrixsand.MatrixSand(8, 16)
diff --git a/CircuitPython_LED_Sand_Hourglass/hourglass/code.py b/CircuitPython_LED_Sand_Hourglass/hourglass/code.py
index 38594fb89..908fd7be9 100755
--- a/CircuitPython_LED_Sand_Hourglass/hourglass/code.py
+++ b/CircuitPython_LED_Sand_Hourglass/hourglass/code.py
@@ -10,12 +10,16 @@ import matrixsand
 
 DELAY = 0.05 # overall update rate
 
+# setup i2c
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
+
 # the accelo
-accelo = adafruit_lsm6ds.lsm6ds33.LSM6DS33(board.I2C())
+accelo = adafruit_lsm6ds.lsm6ds33.LSM6DS33(i2c)
 
 # the matrices
-m1 = matrix.Matrix8x8(board.I2C(), 0x70)
-m2 = matrix.Matrix8x8(board.I2C(), 0x71)
+m1 = matrix.Matrix8x8(i2c, 0x70)
+m2 = matrix.Matrix8x8(i2c, 0x71)
 
 # the sand
 sand1 = matrixsand.MatrixSand(8, 8)
diff --git a/CircuitPython_LED_Sand_Hourglass/single_matrix/code.py b/CircuitPython_LED_Sand_Hourglass/single_matrix/code.py
index 29e5521b9..b3c64fc80 100755
--- a/CircuitPython_LED_Sand_Hourglass/single_matrix/code.py
+++ b/CircuitPython_LED_Sand_Hourglass/single_matrix/code.py
@@ -10,11 +10,15 @@ import matrixsand
 
 DELAY = 0.00 # add some delay if you want
 
+# setup i2c
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
+
 # the accelo
-accelo = adafruit_lsm6ds.lsm6ds33.LSM6DS33(board.I2C())
+accelo = adafruit_lsm6ds.lsm6ds33.LSM6DS33(i2c)
 
 # the matrix
-matrix = matrix.Matrix8x8(board.I2C(), 0x70)
+matrix = matrix.Matrix8x8(i2c, 0x70)
 
 # the sand
 sand = matrixsand.MatrixSand(8, 8)
diff --git a/CircuitPython_OLED_Watch/code.py b/CircuitPython_OLED_Watch/code.py
index 7b0549142..e85cf6d93 100755
--- a/CircuitPython_OLED_Watch/code.py
+++ b/CircuitPython_OLED_Watch/code.py
@@ -15,7 +15,8 @@ font = terminalio.FONT
 
 displayio.release_displays()
 
-i2c = board.I2C()
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 display_bus = displayio.I2CDisplay(i2c, device_address=0x3c)
 oled = adafruit_displayio_ssd1306.SSD1306(display_bus, width=128, height=32)
 
diff --git a/CircuitPython_Templates/i2c_mcp9808/code.py b/CircuitPython_Templates/i2c_mcp9808/code.py
index 57ced821c..c90e36efd 100644
--- a/CircuitPython_Templates/i2c_mcp9808/code.py
+++ b/CircuitPython_Templates/i2c_mcp9808/code.py
@@ -6,6 +6,7 @@ import board
 import adafruit_mcp9808
 
 i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 # import busio
 # i2c = busio.I2C(board.SCL1, board.SDA1) # For QT Py RP2040, QT Py ESP32-S2
 mcp9808 = adafruit_mcp9808.MCP9808(i2c)
diff --git a/CircuitPython_Templates/i2c_scan/code.py b/CircuitPython_Templates/i2c_scan/code.py
index 50a6999f9..5b609fe41 100644
--- a/CircuitPython_Templates/i2c_scan/code.py
+++ b/CircuitPython_Templates/i2c_scan/code.py
@@ -4,11 +4,8 @@
 import time
 import board
 
-# To use default I2C bus (most boards)
-i2c = board.I2C()
-
-# To use the STEMMA QT connector (most boards)
-# i2c = board.STEMMA_I2C()
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 
 # To create I2C bus on specific pins
 # import busio
diff --git a/CircuitPython_Templates/lc709203_simple_data/code.py b/CircuitPython_Templates/lc709203_simple_data/code.py
index e56f6edfb..77f8967d1 100644
--- a/CircuitPython_Templates/lc709203_simple_data/code.py
+++ b/CircuitPython_Templates/lc709203_simple_data/code.py
@@ -8,7 +8,9 @@ import board
 from adafruit_lc709203f import LC709203F, PackSize
 
 # Create sensor object, using the board's default I2C bus.
-battery_monitor = LC709203F(board.I2C())
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
+battery_monitor = LC709203F(i2c)
 
 # Update to match the mAh of your battery for more accurate readings.
 # Can be MAH100, MAH200, MAH400, MAH500, MAH1000, MAH2000, MAH3000.
diff --git a/Clue_Scale/clue_scale_calibrator.py b/Clue_Scale/clue_scale_calibrator.py
index 1d59cb81b..789b18397 100644
--- a/Clue_Scale/clue_scale_calibrator.py
+++ b/Clue_Scale/clue_scale_calibrator.py
@@ -19,7 +19,9 @@ SAMPLE_AVG = 500  # Number of sample values to average
 DEFAULT_GAIN = 128  # Default gain for internal PGA
 
 # Instantiate 24-bit load sensor ADC
-nau7802 = NAU7802(board.I2C(), address=0x2A, active_channels=1)
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
+nau7802 = NAU7802(i2c, address=0x2A, active_channels=1)
 
 
 def zero_channel():
diff --git a/Clue_Scale/code.py b/Clue_Scale/code.py
index 3ba35a6b5..3523c07af 100644
--- a/Clue_Scale/code.py
+++ b/Clue_Scale/code.py
@@ -38,7 +38,9 @@ FYI: A US dime coin weighs 2.268 grams or 0.079 ounces."""
 CALIB_RATIO = 100 / 215300  # load cell serial#4540-02
 
 # Instantiate the Sensor and Display
-nau7802 = NAU7802(board.I2C(), address=0x2A, active_channels=1)
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
+nau7802 = NAU7802(i2c, address=0x2A, active_channels=1)
 
 display = board.DISPLAY
 scale_group = displayio.Group()
diff --git a/Darth_Faders/code.py b/Darth_Faders/code.py
index 1b363f1a3..d2e79ef41 100644
--- a/Darth_Faders/code.py
+++ b/Darth_Faders/code.py
@@ -12,7 +12,9 @@ from adafruit_seesaw import seesaw, rotaryio, digitalio
 
 num_faders = 3
 
-motorwing = MotorKit(i2c=board.I2C())
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
+motorwing = MotorKit(i2c=i2c)
 motorwing.frequency = 122  # tune this 50 - 200 range
 max_throttle = 0.18  # tune this 0.2 - 1 range
 
@@ -32,7 +34,7 @@ for i in range(num_faders):
     motors[i].throttle = None
 
 # STEMMA QT Rotary encoder setup
-seesaw = seesaw.Seesaw(board.I2C(), addr=0x36)  # default address is 0x36
+seesaw = seesaw.Seesaw(i2c, addr=0x36)  # default address is 0x36
 seesaw.pin_mode(24, seesaw.INPUT_PULLUP)
 button_in = digitalio.DigitalIO(seesaw, 24)
 button = Debouncer(button_in)
diff --git a/Data_Logging_with_Feather_and_CircuitPython/code.py b/Data_Logging_with_Feather_and_CircuitPython/code.py
index d734d8040..0afed8a80 100644
--- a/Data_Logging_with_Feather_and_CircuitPython/code.py
+++ b/Data_Logging_with_Feather_and_CircuitPython/code.py
@@ -12,6 +12,7 @@ import adafruit_am2320
 vbat_voltage = analogio.AnalogIn(board.D9)
 
 i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 am2320 = adafruit_am2320.AM2320(i2c)
 
 SD_CS = board.D10
diff --git a/Disconnected_CO2_Data_Logger/code.py b/Disconnected_CO2_Data_Logger/code.py
index aeb76f029..4fed2ca08 100644
--- a/Disconnected_CO2_Data_Logger/code.py
+++ b/Disconnected_CO2_Data_Logger/code.py
@@ -11,7 +11,8 @@ import storage
 import adafruit_pcf8523
 
 #  setup for I2C
-i2c = board.I2C()
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 #  setup for SCD40
 scd4x = adafruit_scd4x.SCD4X(i2c)
 #  setup for RTC
diff --git a/EyeLights_Accelerometer_Tap/EyeLights_Accelerometer_Tap_CircuitPython/code.py b/EyeLights_Accelerometer_Tap/EyeLights_Accelerometer_Tap_CircuitPython/code.py
index 87647dfde..12f026149 100644
--- a/EyeLights_Accelerometer_Tap/EyeLights_Accelerometer_Tap_CircuitPython/code.py
+++ b/EyeLights_Accelerometer_Tap/EyeLights_Accelerometer_Tap_CircuitPython/code.py
@@ -25,7 +25,9 @@ import adafruit_lis3dh
 import adafruit_is31fl3741
 from adafruit_is31fl3741.adafruit_ledglasses import LED_Glasses
 
-i2c = board.I2C()  # Shared by both the accelerometer and LED controller
+# Shared by both the accelerometer and LED controller
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 
 # Initialize the accelerometer and enable single-tap detection
 int1 = digitalio.DigitalInOut(board.ACCELEROMETER_INTERRUPT)
diff --git a/EyeLights_Googly_Rings/EyeLights_Googly_Rings_CircuitPython/code.py b/EyeLights_Googly_Rings/EyeLights_Googly_Rings_CircuitPython/code.py
index b031946ff..71a2c05a4 100755
--- a/EyeLights_Googly_Rings/EyeLights_Googly_Rings_CircuitPython/code.py
+++ b/EyeLights_Googly_Rings/EyeLights_Googly_Rings_CircuitPython/code.py
@@ -20,7 +20,9 @@ from adafruit_is31fl3741.adafruit_ledglasses import LED_Glasses
 
 # HARDWARE SETUP ----
 
-i2c = board.I2C()  # Shared by both the accelerometer and LED controller
+# Shared by both the accelerometer and LED controller
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 
 # Initialize the accelerometer
 lis3dh = adafruit_lis3dh.LIS3DH_I2C(i2c)
diff --git a/Feather_ESP32-S2_TFT_Azure/code.py b/Feather_ESP32-S2_TFT_Azure/code.py
index 905e15acb..bc6c55f10 100644
--- a/Feather_ESP32-S2_TFT_Azure/code.py
+++ b/Feather_ESP32-S2_TFT_Azure/code.py
@@ -84,8 +84,10 @@ minute = cal[4]
 # (https://github.com/adafruit/Adafruit_CircuitPython_Bundle):
 # * adafruit-circuitpython-minimqtt
 # * adafruit-circuitpython-requests
+
 # Create sensor object, communicating over the board's default I2C bus
 i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 bme680 = adafruit_bme680.Adafruit_BME680_I2C(i2c, debug=False)
 
 # change this to match the location's pressure (hPa) at sea level
@@ -106,7 +108,7 @@ print("Connected to Azure IoT Central!")
 temperature_offset = -5
 
 # Create sensor object, using the board's default I2C bus.
-battery_monitor = LC709203F(board.I2C())
+battery_monitor = LC709203F(i2c)
 
 # Update to match the mAh of your battery for more accurate readings.
 # Can be MAH100, MAH200, MAH400, MAH500, MAH1000, MAH2000, MAH3000.
diff --git a/FunHouse_Fume_Extractor/code.py b/FunHouse_Fume_Extractor/code.py
index c99ea4278..f5403de7d 100644
--- a/FunHouse_Fume_Extractor/code.py
+++ b/FunHouse_Fume_Extractor/code.py
@@ -11,7 +11,8 @@ import adafruit_imageload
 from adafruit_emc2101 import EMC2101
 from adafruit_funhouse import FunHouse
 
-i2c = board.I2C()
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 
 #  setup for SGP30 sensor
 sgp30 = adafruit_sgp30.Adafruit_SGP30(i2c)
diff --git a/FunHouse_IOT_Hub/battery_peripheral/code.py b/FunHouse_IOT_Hub/battery_peripheral/code.py
index 72a526d31..3a670794a 100644
--- a/FunHouse_IOT_Hub/battery_peripheral/code.py
+++ b/FunHouse_IOT_Hub/battery_peripheral/code.py
@@ -97,7 +97,9 @@ io.on_message = message
 print("Connecting to Adafruit IO...")
 io.connect()
 
-display_bus = displayio.I2CDisplay(board.I2C(), device_address=0x3C)
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
+display_bus = displayio.I2CDisplay(i2c, device_address=0x3C)
 
 WIDTH = 128
 HEIGHT = 32