diff --git a/multicore/multicore.py b/multicore/multicore.py
index bcacef7..e64db12 100644
--- a/multicore/multicore.py
+++ b/multicore/multicore.py
@@ -1,7 +1,7 @@
 import time, _thread, machine
 
 def task(n, delay):
-    led = machine.Pin(25, machine.Pin.OUT)
+    led = machine.Pin("LED", machine.Pin.OUT)
     for i in range(n):
         led.high()
         time.sleep(delay)
diff --git a/pio/pio_blink.py b/pio/pio_blink.py
index c53ebc8..df9e6be 100644
--- a/pio/pio_blink.py
+++ b/pio/pio_blink.py
@@ -19,7 +19,7 @@ def blink():
     nop()          [31]
     wrap()
 
-# Instantiate a state machine with the blink program, at 2000Hz, with set bound to Pin(25) (LED on the rp2 board)
+# Instantiate a state machine with the blink program, at 2000Hz, with set bound to Pin(25) (LED on the Pico board)
 sm = rp2.StateMachine(0, blink, freq=2000, set_base=Pin(25))
 
 # Run the state machine for 3 seconds.  The LED should blink.
diff --git a/pio/pio_exec.py b/pio/pio_exec.py
index d8cbc33..4d2b689 100644
--- a/pio/pio_exec.py
+++ b/pio/pio_exec.py
@@ -14,7 +14,7 @@ def prog():
     pass
 
 
-# Construct the StateMachine, binding Pin(25) to the set pin.
+# Construct the StateMachine, binding Pin 25 to the set pin.
 sm = rp2.StateMachine(0, prog, set_base=Pin(25))
 
 # Turn on the set pin via an exec instruction.
diff --git a/pio/pio_pwm.py b/pio/pio_pwm.py
index b4c50b0..4d8ce2d 100644
--- a/pio/pio_pwm.py
+++ b/pio/pio_pwm.py
@@ -34,7 +34,7 @@ class PIOPWM:
         self._sm.put(value)
 
 
-# Pin 25 is LED on Pico boards
+# Pin 25 on Pico boards
 pwm = PIOPWM(0, 25, max_count=(1 << 16) - 1, count_freq=10_000_000)
 
 while True:
diff --git a/pwm/pwm_fade.py b/pwm/pwm_fade.py
index 7264eda..5a10554 100644
--- a/pwm/pwm_fade.py
+++ b/pwm/pwm_fade.py
@@ -5,7 +5,7 @@ from machine import Pin, PWM
 
 
 # Construct PWM object, with LED on Pin(25).
-pwm = PWM(Pin(25))
+pwm = PWM(Pin("LED"))
 
 # Set the PWM frequency.
 pwm.freq(1000)