https://devzone.nordicsemi.com/f/nordic-q-a/5339/minimize-power-consumption-of-led-flashingI have a &quot;heartbeat&quot; LED which flashes for 10mS every 2 seconds. I was doing this with one of the HW timers and a PPI channel, but I have discovered that just having the HW timer running seems to add around 4mA to the power budget(which I guess is noten-USTelligent Community 13Fri, 30 Jan 2015 13:38:29 GMThttps://devzone.nordicsemi.com/thread/18651?ContentTypeID=1Fri, 30 Jan 2015 13:38:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5a18a38e-60ed-4409-b178-e8bcd5f013aaJohnBrown<p>Thanks. Why would that be better than using the same timer but alternating the period each time?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/18650?ContentTypeID=1Thu, 29 Jan 2015 23:02:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6a0be29b-a389-44ba-88b9-0719bfdc3e26Locky<p>For an application like this I use two app_timers. One repeated timer set for 2 second cycling, and a One-Shot timer which is set to 10msec. When you hit the Repeated timer handler:</p> <ol> <li>Turn on the LED</li> <li>Start a 10msec one-shot-timer</li> </ol> <p>Have the One-shot handler turn off the LED.</p><div style="clear:both;"></div>