https://devzone.nordicsemi.com/f/nordic-q-a/50977/how-to-set-pwm-cycle-to-10-secondsHi, I use SDK 10 pwm example (examples\peripheral\pwm) to modify the PWM cycle to 10s and duty cycle to 50%. Code showed as below: But the PWM cycle seem only around 3 seconds. Can it possible change PWM cycle time to 10s ? If can, how to doen-USTelligent Community 13Wed, 14 Aug 2019 12:51:01 GMThttps://devzone.nordicsemi.com/thread/204078?ContentTypeID=1Wed, 14 Aug 2019 12:51:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9fdce274-feba-4e2d-bb02-28aff0c81311Einar Thorsrud<p>Hi,</p> <p>The 16 bit timer on the nRF51 will wrap around after a bit more than two seconds, using the lowest possible frequency (after the prescaler). So if you need a longer cycle you need to either modify the PWM library to handle wrapping or consider using the RTC (for instance via the app_timer) instead. Luckily, you don&#39;t have to implement the RTC approach yourself, as we provide a <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk51.v10.0.0/lib_low_power_pwm.html?cp=5_5_11_3_13">low power PWM library</a> for this reason. Unless you need a very accurate signal despite the long duration, then the RTC bases approach you get in the ow power PWM library is probably just what you need.</p> <p>By the way, is there a particular reason you are using SDK 10? (The latest SDK with support for nRF51 is 12.3).</p><div style="clear:both;"></div>