.. _fade-led-sample:
PWM: Fade LED
#############
Overview
********
This is a sample app which fades a LED using PWM.
The LED will start from dark and increases its
brightness gradually for 10 seconds. Then, the
brightness reduces gradually for 10 seconds and
finally the LED becomes dark again. The LED will
repeat this cycle for ever.
Wiring
******
Nucleo_F401RE, Nucleo_L476RG
============================
Connect PWM2(PA0) to LED
Nucleo_F103RB
=============
Connect PWM1(PA8) to LED
Nucleo_L496ZG
=============
No special board setup is necessary because there are three on-board LEDs (red,
green, blue) connected to the Nucleo's PWM.
Nucleo_H743ZI
=============
No special board setup is necessary because the on-board red LED is connected
to PWM output 12 (channel 1).
Hexiwear K64
============
No special board setup is necessary because there is an on-board RGB LED
connected to the K64 PWM.
nrf52840dk_nrf52840
===================
No special board setup is necessary because there is an on-board LED connected.
Building and Running
********************
This sample can be built for multiple boards, in this example we will build it
for the nrf52840dk_nrf52840 board:
.. zephyr-app-commands::
:zephyr-app: samples/basic/fade_led
:board: nrf52840dk_nrf52840
:goals: build flash
:compact:
cf2131d7f9