diff --git a/FunHouse_IOT_Hub/battery_peripheral/code.py b/FunHouse_IOT_Hub/battery_peripheral/code.py
index 72a526d31..4ef08284e 100644
--- a/FunHouse_IOT_Hub/battery_peripheral/code.py
+++ b/FunHouse_IOT_Hub/battery_peripheral/code.py
@@ -116,7 +116,9 @@ alarm_label = label.Label(terminalio.FONT, text="Voltage: ", color=0xFFFFFF, x=4
 splash.append(alarm_label)
 
 
-sensor = 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
+sensor = LC709203F(i2c)
 
 start = 0
 while True:
diff --git a/Glider_Paper_Airplane_Controller/code.py b/Glider_Paper_Airplane_Controller/code.py
index d22d0e6ed..77a179104 100644
--- a/Glider_Paper_Airplane_Controller/code.py
+++ b/Glider_Paper_Airplane_Controller/code.py
@@ -13,7 +13,8 @@ from adafruit_hid.keyboard import Keyboard
 from adafruit_hid.keycode import Keycode
 
 #  I2C setup
-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
 lis3dh = adafruit_lis3dh.LIS3DH_I2C(i2c)
 
 #  range of LIS3DH
diff --git a/Google_Sheet_Sensor_Logging/bme280_logger.py b/Google_Sheet_Sensor_Logging/bme280_logger.py
index 2f9047ad9..69077c09b 100755
--- a/Google_Sheet_Sensor_Logging/bme280_logger.py
+++ b/Google_Sheet_Sensor_Logging/bme280_logger.py
@@ -17,7 +17,9 @@ UPDATE_RATE = 60
 #--| User Config |-----------------------------------------------
 
 # Sensor setup
-bme = adafruit_bme280.Adafruit_BME280_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
+bme = adafruit_bme280.Adafruit_BME280_I2C(i2c)
 
 # Google Sheets API setup
 SCOPES = ['https://spreadsheets.google.com/feeds',
diff --git a/HalloWing_Cat_Toy/code.py b/HalloWing_Cat_Toy/code.py
index 7a91c7e91..1638505ed 100644
--- a/HalloWing_Cat_Toy/code.py
+++ b/HalloWing_Cat_Toy/code.py
@@ -54,7 +54,8 @@ pixels.fill((0, 0, 0))
 pixels.show()
 
 # setup accelerometer
-# 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
 # lis3dh = adafruit_lis3dh.LIS3DH_I2C(i2c)
 
 
diff --git a/Hallowing_Jump_Sound/jump-sound/code.py b/Hallowing_Jump_Sound/jump-sound/code.py
index 5f4364f40..82cfa2f7b 100755
--- a/Hallowing_Jump_Sound/jump-sound/code.py
+++ b/Hallowing_Jump_Sound/jump-sound/code.py
@@ -71,16 +71,17 @@ TOUCH3 = touchio.TouchIn(board.TOUCH3)
 TOUCH4 = touchio.TouchIn(board.TOUCH4)
 
 # Set up accelerometer on I2C bus, 4G range:
-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
 if IS_HALLOWING_M4:
     import adafruit_msa301
-    ACCEL = adafruit_msa301.MSA301(I2C)
+    ACCEL = adafruit_msa301.MSA301(i2c)
 else:
     import adafruit_lis3dh
     try:
-        ACCEL = adafruit_lis3dh.LIS3DH_I2C(I2C, address=0x18) # Production board
+        ACCEL = adafruit_lis3dh.LIS3DH_I2C(i2c, address=0x18) # Production board
     except ValueError:
-        ACCEL = adafruit_lis3dh.LIS3DH_I2C(I2C, address=0x19) # Beta hardware
+        ACCEL = adafruit_lis3dh.LIS3DH_I2C(i2c, address=0x19) # Beta hardware
     ACCEL.range = adafruit_lis3dh.RANGE_4_G
 
 try:
diff --git a/Hallowing_Jump_Sound/stomp-and-roar/code.py b/Hallowing_Jump_Sound/stomp-and-roar/code.py
index dc2de1734..eee0b8745 100755
--- a/Hallowing_Jump_Sound/stomp-and-roar/code.py
+++ b/Hallowing_Jump_Sound/stomp-and-roar/code.py
@@ -54,16 +54,17 @@ except AttributeError:
     pass
 
 # Set up accelerometer on I2C bus, 4G range:
-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
 if IS_HALLOWING_M4:
     import adafruit_msa301
-    ACCEL = adafruit_msa301.MSA301(I2C)
+    ACCEL = adafruit_msa301.MSA301(i2c)
 else:
     import adafruit_lis3dh
     try:
-        ACCEL = adafruit_lis3dh.LIS3DH_I2C(I2C, address=0x18) # Production board
+        ACCEL = adafruit_lis3dh.LIS3DH_I2C(i2c, address=0x18) # Production board
     except ValueError:
-        ACCEL = adafruit_lis3dh.LIS3DH_I2C(I2C, address=0x19) # Beta hardware
+        ACCEL = adafruit_lis3dh.LIS3DH_I2C(i2c, address=0x19) # Beta hardware
     ACCEL.range = adafruit_lis3dh.RANGE_4_G
 
 STEP_INTERVAL_MIN = 0.3 # Shortest interval to walk one step (seconds)
diff --git a/Home_Assistant_Sensor/code.py b/Home_Assistant_Sensor/code.py
index 4365025a6..2cb55a42f 100755
--- a/Home_Assistant_Sensor/code.py
+++ b/Home_Assistant_Sensor/code.py
@@ -23,7 +23,9 @@ MQTT_TOPIC = "state/temp-sensor"
 USE_DEEP_SLEEP = True
 
 # Connect to the Sensor
-sht = adafruit_shtc3.SHTC3(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
+sht = adafruit_shtc3.SHTC3(i2c)
 
 # Add a secrets.py to your filesystem that has a dictionary called secrets with "ssid" and
 # "password" keys with your WiFi credentials. DO NOT share that file or commit it into Git or other
diff --git a/I2C_Multiple_Same_Address/circuitpython/multi_bme280_2x/code.py b/I2C_Multiple_Same_Address/circuitpython/multi_bme280_2x/code.py
index 17e870a17..f6db370ef 100755
--- a/I2C_Multiple_Same_Address/circuitpython/multi_bme280_2x/code.py
+++ b/I2C_Multiple_Same_Address/circuitpython/multi_bme280_2x/code.py
@@ -7,7 +7,8 @@ import board
 from adafruit_bme280 import basic as adafruit_bme280
 
 # Get the board's default I2C port
-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
 
 #--------------------------------------------------------------------
 # NOTE!!! This is the "special" part of the code
diff --git a/I2C_Multiple_Same_Address/circuitpython/multi_bme280_3x/code.py b/I2C_Multiple_Same_Address/circuitpython/multi_bme280_3x/code.py
index eeba454fb..25e26efb6 100755
--- a/I2C_Multiple_Same_Address/circuitpython/multi_bme280_3x/code.py
+++ b/I2C_Multiple_Same_Address/circuitpython/multi_bme280_3x/code.py
@@ -8,7 +8,8 @@ import adafruit_tca9548a
 from adafruit_bme280 import basic as adafruit_bme280
 
 # Create I2C bus as normal
-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
 
 # Create the TCA9548A object and give it the I2C bus
 tca = adafruit_tca9548a.TCA9548A(i2c)
diff --git a/I2C_Multiple_Same_Address/circuitpython/multi_bme280_4x/code.py b/I2C_Multiple_Same_Address/circuitpython/multi_bme280_4x/code.py
index 53024b8f7..e078c93f6 100755
--- a/I2C_Multiple_Same_Address/circuitpython/multi_bme280_4x/code.py
+++ b/I2C_Multiple_Same_Address/circuitpython/multi_bme280_4x/code.py
@@ -8,7 +8,8 @@ import adafruit_tca9548a
 from adafruit_bme280 import basic as adafruit_bme280
 
 # Create I2C bus as normal
-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
 
 # Create the TCA9548A object and give it the I2C bus
 tca = adafruit_tca9548a.TCA9548A(i2c)
diff --git a/I2C_Multiple_Same_Address/circuitpython/multi_tca_2x/code.py b/I2C_Multiple_Same_Address/circuitpython/multi_tca_2x/code.py
index a84fd1784..01d154812 100755
--- a/I2C_Multiple_Same_Address/circuitpython/multi_tca_2x/code.py
+++ b/I2C_Multiple_Same_Address/circuitpython/multi_tca_2x/code.py
@@ -8,7 +8,8 @@ import adafruit_tca9548a
 from adafruit_bme280 import basic as adafruit_bme280
 
 # Create I2C bus as normal
-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
 
 #--------------------------------------------------------------------
 # NOTE!!! This is the "special" part of the code
diff --git a/I_Voted_Pin/code.py b/I_Voted_Pin/code.py
index eca7f4af3..5c6f981d8 100755
--- a/I_Voted_Pin/code.py
+++ b/I_Voted_Pin/code.py
@@ -33,7 +33,8 @@ button_c = Debouncer(pin_c) #5
 font = bitmap_font.load_font('/mround-31.bdf')
 
 # Set up display & add group
-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)
 display = adafruit_displayio_ssd1306.SSD1306(display_bus, width=128, height=32)
 group = displayio.Group()
diff --git a/LED_Bullwhip/code.py b/LED_Bullwhip/code.py
index beae3c1ee..905e510bc 100644
--- a/LED_Bullwhip/code.py
+++ b/LED_Bullwhip/code.py
@@ -70,7 +70,8 @@ strip.show()
 
 WAVE_FILE = None
 
-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
 
 #Set up accelerometer & mic
 
diff --git a/LED_Snowboard/code.py b/LED_Snowboard/code.py
index c774343d0..2473806a9 100644
--- a/LED_Snowboard/code.py
+++ b/LED_Snowboard/code.py
@@ -67,7 +67,8 @@ enable.value = False
 
 
 # Set up accelerometer on I2C bus, 4G range:
-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
 accel = adafruit_lis3dh.LIS3DH_I2C(i2c)
 accel.range = adafruit_lis3dh.RANGE_4_G
 accel.set_tap(2, 15)
diff --git a/Laser_Harp/code.py b/Laser_Harp/code.py
index c8df580a2..9aed327c1 100644
--- a/Laser_Harp/code.py
+++ b/Laser_Harp/code.py
@@ -15,6 +15,7 @@ from adafruit_midi.control_change import ControlChange
 
 # Create I2C bus as normal
 i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 
 # Create the TCA9548A object and give it the I2C bus
 tca = adafruit_tca9548a.TCA9548A(i2c)
diff --git a/Laser_Harp/laser_harp_two_voice.py b/Laser_Harp/laser_harp_two_voice.py
index dc366ed57..63d6afbb9 100644
--- a/Laser_Harp/laser_harp_two_voice.py
+++ b/Laser_Harp/laser_harp_two_voice.py
@@ -16,6 +16,7 @@ import adafruit_tca9548a
 
 # Create I2C bus as normal
 i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 
 # Create the TCA9548A object and give it the I2C bus
 tca = adafruit_tca9548a.TCA9548A(i2c)
diff --git a/Laser_Harp/usb_midi_code.py b/Laser_Harp/usb_midi_code.py
index 75bfa60e1..6d8dd8233 100644
--- a/Laser_Harp/usb_midi_code.py
+++ b/Laser_Harp/usb_midi_code.py
@@ -14,6 +14,7 @@ from adafruit_midi.control_change import ControlChange
 
 # Create I2C bus as normal
 i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 
 # Create the TCA9548A object and give it the I2C bus
 tca = adafruit_tca9548a.TCA9548A(i2c)
diff --git a/MIDI_Melody_Maker/code.py b/MIDI_Melody_Maker/code.py
index afd983e4d..69f8e9251 100644
--- a/MIDI_Melody_Maker/code.py
+++ b/MIDI_Melody_Maker/code.py
@@ -32,7 +32,8 @@ pixel = neopixel.NeoPixel(board.NEOPIXEL, 1, brightness=0)
 pixel.fill((0, 0, 0))
 
 # Use for I2C for STEMMA OLED
-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=0x3D, reset=oled_reset)
 
 #  STEMMA OLED dimensions. can have height of 64, but 32 makes text larger
diff --git a/MIDI_to_CV_Skull/code.py b/MIDI_to_CV_Skull/code.py
index e6257c2a2..7149cfef4 100644
--- a/MIDI_to_CV_Skull/code.py
+++ b/MIDI_to_CV_Skull/code.py
@@ -25,7 +25,8 @@ gate = DigitalInOut(board.A1)
 gate.direction = Direction.OUTPUT
 
 #  i2c setup
-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
 #  dac setup over i2c
 dac = adafruit_mcp4725.MCP4725(i2c)
 
diff --git a/Macropad_2FA_TOTP/code.py b/Macropad_2FA_TOTP/code.py
index 734d2173f..834f25089 100755
--- a/Macropad_2FA_TOTP/code.py
+++ b/Macropad_2FA_TOTP/code.py
@@ -43,7 +43,9 @@ except KeyError:
     raise
 
 # set board to use PCF8523 as its RTC
-pcf = adafruit_pcf8523.PCF8523(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
+pcf = adafruit_pcf8523.PCF8523(i2c)
 rtc.set_time_source(pcf)
 
 #-------------------------------------------------------------------------