diff --git a/examples/tc74_simpletest.py b/examples/tc74_simpletest.py
index 407f7c7..0b6d10e 100755
--- a/examples/tc74_simpletest.py
+++ b/examples/tc74_simpletest.py
@@ -5,7 +5,8 @@
 import board
 import adafruit_tc74
 
-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
 tc = adafruit_tc74.TC74(i2c)
 
 while True: