diff --git a/Raspberry_Pi_Azure_IoT_Hub_Dashboard/featherTft_bme680/code.py b/Raspberry_Pi_Azure_IoT_Hub_Dashboard/featherTft_bme680/code.py
index 555b9aa17..19410a04b 100644
--- a/Raspberry_Pi_Azure_IoT_Hub_Dashboard/featherTft_bme680/code.py
+++ b/Raspberry_Pi_Azure_IoT_Hub_Dashboard/featherTft_bme680/code.py
@@ -64,6 +64,7 @@ hour = cal[3]
 minute = cal[4]
 
 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
@@ -72,7 +73,9 @@ bme680.sea_level_pressure = 1013.25
 temperature_offset = -5
 
 # 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/Raspberry_Pi_Video_Synth/BlinkaRaspberryPiVideoSynth.py b/Raspberry_Pi_Video_Synth/BlinkaRaspberryPiVideoSynth.py
index 14cef650e..73b2bf913 100644
--- a/Raspberry_Pi_Video_Synth/BlinkaRaspberryPiVideoSynth.py
+++ b/Raspberry_Pi_Video_Synth/BlinkaRaspberryPiVideoSynth.py
@@ -11,10 +11,12 @@ from adafruit_seesaw import seesaw, rotaryio, neopixel
 from adafruit_seesaw.analoginput import AnalogInput
 
 #  VL53L4CD setup
-vl53 = adafruit_vl53l4cd.VL53L4CD(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
+vl53 = adafruit_vl53l4cd.VL53L4CD(i2c)
 
 # rotary encoder setup
-encoder = seesaw.Seesaw(board.I2C(), addr=0x36)
+encoder = seesaw.Seesaw(i2c, addr=0x36)
 encoder.pin_mode(24, encoder.INPUT_PULLUP)
 rot_encoder = rotaryio.IncrementalEncoder(encoder)
 
@@ -22,15 +24,15 @@ rot_encoder = rotaryio.IncrementalEncoder(encoder)
 # 0x30 = red control
 # 0x31 = green control
 # 0x32 = blue control
-red_slider = seesaw.Seesaw(board.I2C(), 0x30)
+red_slider = seesaw.Seesaw(i2c, 0x30)
 red_pot = AnalogInput(red_slider, 18)
 r_pix = neopixel.NeoPixel(red_slider, 14, 4)
 
-g_slider = seesaw.Seesaw(board.I2C(), 0x31)
+g_slider = seesaw.Seesaw(i2c, 0x31)
 green_pot = AnalogInput(g_slider, 18)
 g_pix = neopixel.NeoPixel(g_slider, 14, 4)
 
-b_slider = seesaw.Seesaw(board.I2C(), 0x32)
+b_slider = seesaw.Seesaw(i2c, 0x32)
 blue_pot = AnalogInput(b_slider, 18)
 b_pix = neopixel.NeoPixel(b_slider, 14, 4)
 
@@ -143,4 +145,4 @@ while True:
         c.send(str.encode(' '.join(["flight", str(flight)])))
             #  reset last_flight
         last_flight = flight
-    
\ No newline at end of file
+    
diff --git a/Seesaw_QT_Rotary_Encoder_Multiples/code.py b/Seesaw_QT_Rotary_Encoder_Multiples/code.py
index edbbde48d..8bf28980f 100755
--- a/Seesaw_QT_Rotary_Encoder_Multiples/code.py
+++ b/Seesaw_QT_Rotary_Encoder_Multiples/code.py
@@ -7,8 +7,11 @@
 import board
 from adafruit_seesaw import seesaw, rotaryio, digitalio, neopixel
 
-qt_enc1 = seesaw.Seesaw(board.I2C(), addr=0x36)
-qt_enc2 = seesaw.Seesaw(board.I2C(), addr=0x37)
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
+
+qt_enc1 = seesaw.Seesaw(i2c, addr=0x36)
+qt_enc2 = seesaw.Seesaw(i2c, addr=0x37)
 
 qt_enc1.pin_mode(24, qt_enc1.INPUT_PULLUP)
 button1 = digitalio.DigitalIO(qt_enc1, 24)
diff --git a/Smart_Alarm_Clock/code.py b/Smart_Alarm_Clock/code.py
index 4e2c5a5d5..ea1923bcc 100644
--- a/Smart_Alarm_Clock/code.py
+++ b/Smart_Alarm_Clock/code.py
@@ -200,9 +200,10 @@ def on_enable(client, feed_id, payload):
 
 
 # Set up rotary encoder
-i2c_bus = 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
 
-seesaw = Seesaw(i2c_bus, addr=0x36)
+seesaw = Seesaw(i2c, addr=0x36)
 
 seesaw_product = (seesaw.get_version() >> 16) & 0xFFFF
 print("Found product {}".format(seesaw_product))
diff --git a/Trinkey_QT2040_Enviro_Gadget/circuitpython/enviromon.py b/Trinkey_QT2040_Enviro_Gadget/circuitpython/enviromon.py
index 4c104312c..3d6ff4946 100755
--- a/Trinkey_QT2040_Enviro_Gadget/circuitpython/enviromon.py
+++ b/Trinkey_QT2040_Enviro_Gadget/circuitpython/enviromon.py
@@ -23,9 +23,11 @@ if usb_cdc.data is None:
         pass
 
 # setup stuff
-scd = adafruit_scd4x.SCD4X(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
+scd = adafruit_scd4x.SCD4X(i2c)
 scd.start_periodic_measurement()
-bme = adafruit_bme280.Adafruit_BME280_I2C(board.I2C())
+bme = adafruit_bme280.Adafruit_BME280_I2C(i2c)
 pixel = neopixel.NeoPixel(board.NEOPIXEL, 1)
 
 # CSV output
diff --git a/Trinkey_QT2040_Enviro_Gadget/u2if/enviro_u2if.py b/Trinkey_QT2040_Enviro_Gadget/u2if/enviro_u2if.py
index cb186a302..cb605d5aa 100755
--- a/Trinkey_QT2040_Enviro_Gadget/u2if/enviro_u2if.py
+++ b/Trinkey_QT2040_Enviro_Gadget/u2if/enviro_u2if.py
@@ -7,10 +7,12 @@ import board
 import adafruit_scd4x
 from adafruit_bme280 import basic as adafruit_bme280
 
-scd = adafruit_scd4x.SCD4X(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
+scd = adafruit_scd4x.SCD4X(i2c)
 scd.start_periodic_measurement()
 
-bme = adafruit_bme280.Adafruit_BME280_I2C(board.I2C())
+bme = adafruit_bme280.Adafruit_BME280_I2C(i2c)
 
 while True:
     time.sleep(5)
diff --git a/Ukulele/code.py b/Ukulele/code.py
index b0dae0255..b6585f43e 100644
--- a/Ukulele/code.py
+++ b/Ukulele/code.py
@@ -64,7 +64,8 @@ enable = digitalio.DigitalInOut(POWER_PIN)
 enable.direction = digitalio.Direction.OUTPUT
 enable.value = False
 
-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
 
 pixels = neopixel.NeoPixel(NEOPIXEL_PIN, NUM_PIXELS, brightness=1, auto_write=False)
 pixels.fill(0)  # NeoPixels off ASAP on startup
diff --git a/Webhook_Plant_Sensor/code.py b/Webhook_Plant_Sensor/code.py
index 1be85bb7f..438602e30 100644
--- a/Webhook_Plant_Sensor/code.py
+++ b/Webhook_Plant_Sensor/code.py
@@ -24,8 +24,9 @@ LOW = False
 MIN = 500
 
 # Set up moisture sensor with seesaw
-i2c_bus = board.I2C()
-seesaw = Seesaw(i2c_bus, addr=0x36)
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
+seesaw = Seesaw(i2c, addr=0x36)
 
 # Get wifi details and more from a secrets.py file
 try:
diff --git a/blahaj/code.py b/blahaj/code.py
index 6f5273151..ccbc1bcd1 100644
--- a/blahaj/code.py
+++ b/blahaj/code.py
@@ -11,8 +11,10 @@ from simpleio import tone
 import neopixel
 from adafruit_led_animation.animation.rainbow import Rainbow
 
-rtc = adafruit_pcf8523.PCF8523(board.I2C())
-battery = 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
+rtc = adafruit_pcf8523.PCF8523(i2c)
+battery = LC709203F(i2c)
 indicator = neopixel.NeoPixel(board.A1, 1)
 
 LEDs = neopixel.NeoPixel(board.A2, 20)
diff --git a/ulab_Crunch_Numbers_Fast/cluebarometer/code.py b/ulab_Crunch_Numbers_Fast/cluebarometer/code.py
index 5d002b6b1..cba1c923b 100644
--- a/ulab_Crunch_Numbers_Fast/cluebarometer/code.py
+++ b/ulab_Crunch_Numbers_Fast/cluebarometer/code.py
@@ -136,7 +136,8 @@ def sleep_deadline(deadline_ns):
 
 
 # Initialize our sensor
-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
 sensor = adafruit_bmp280.Adafruit_BMP280_I2C(i2c)
 sensor.standby_period = adafruit_bmp280.STANDBY_TC_1000
 # Disable in-sensor filtering, because we want to show how it's done in