https://devzone.nordicsemi.com/f/nordic-q-a/46153/pwm-frequency-and-pulse-width-relatedDear nordic, I want to make a PWM with frequency 1 HZ - 100 HZ and pulse width of 100 us. i see several demo in PWM . can you help me how to make this ? what parameters are needed to change? i need to use softdevice for BLE alsoen-USTelligent Community 13Mon, 15 Apr 2019 07:08:28 GMThttps://devzone.nordicsemi.com/thread/181988?ContentTypeID=1Mon, 15 Apr 2019 07:08:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ed3190a2-4246-4bd0-8eb6-333c4a53bbbdEinar Thorsrud<p>Hi,</p> <p>What are your requirements with regard to accuracy and power consumption? Since this is very low frequencies, it might make most sense to use the <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/lib_low_power_pwm.html?cp=5_0_3_27">Low-power PWM library</a>, provided that you do not need very high accuracy. This uses an&nbsp;RTC which runs of the LFCLK. Other alternatives are the <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/lib_pwm.html?cp=5_0_3_34">PWM librar</a>y (which is more accurate as it uses a TIMER peripheral using the HFCLK, but has higher current consumption), and on the nRF52840 you also have the <a href="https://infocenter.nordicsemi.com/topic/ps_nrf52840/pwm.html?cp=3_0_0_5_16">PWM peripheral</a>. You can find examples of all these options in the SDK under <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/examples_hw_peripheral_devices.html?cp=5_0_4_6">Hardware peripheral examples</a>.</p><div style="clear:both;"></div>