Oscillator Clock Rate: Difference between revisions
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The clock rate can be set to '''8Mhz''' or '''4MHz''' using the Arduino IDE. | The clock rate can be set to '''8Mhz''' or '''4MHz''' using the Arduino IDE. | ||
Using 8Mhz will provide the best IR performance, while 4MHz may provide a longer battery life. Do not use any other clock rate. | Using 8Mhz will provide the best IR performance, while 4MHz may provide a slightly longer battery life. Do not use any other clock rate. | ||
''Note: The granularity of the Arduino micros() function, increases as the clock rate changes from 16MHz to 8MHz to 4Mhz to 1Mhz. This has a knock on effect on the IR signal timing. Running on batteries, 16MHz is out of spec & at 1Mhz the IR performance is materially impacted by the granularity of the Arduino timing.'' | ''Note: The granularity of the Arduino micros() function, increases as the clock rate changes from 16MHz to 8MHz to 4Mhz to 1Mhz. This has a knock on effect on the IR signal timing. Running on batteries, 16MHz is out of spec & at 1Mhz the IR performance is materially impacted by the granularity of the Arduino timing.'' | ||
Revision as of 09:32, 24 October 2019
The clock rate can be set to 8Mhz or 4MHz using the Arduino IDE.
Using 8Mhz will provide the best IR performance, while 4MHz may provide a slightly longer battery life. Do not use any other clock rate.
Note: The granularity of the Arduino micros() function, increases as the clock rate changes from 16MHz to 8MHz to 4Mhz to 1Mhz. This has a knock on effect on the IR signal timing. Running on batteries, 16MHz is out of spec & at 1Mhz the IR performance is materially impacted by the granularity of the Arduino timing.
Thus we strongly suggest using 8MHz as the default clock rate, which provides a good balance between IR performance and battery rate. If you know your way around low power operation & want to drain the last bit of juice from the batteries ,then it is Ok to consider 4MHz. In our opinion, it would be preferable to swap out the batteries a little sooner and enjoy the better IR performance/experience.