Timer interruption and pwm power consumption

RE: Timer interruption and pwm power consumption

haakonsh — Wed, 24 Jun 2020 10:04:44 GMT

[quote user="Nasib"]can i reduce the power consumption reducing the frequency of a pwm ? [/quote]

You can reduce some of the current consumption by reducing the frequency of the PWM, but again it depends on the load impedance.

[quote user="Nasib"]i am using the pwm to create a breathing feeling in a couple of LEDs. Which is the correct frequency for that ? ( because i am using randomply 1Khz)
[/quote]

It depends, there's no one frequency that is best for all use-cases. I suggest you ask the manufacturer of your LED's.

RE: Timer interruption and pwm power consumption

Nasib — Tue, 23 Jun 2020 10:44:33 GMT

what i meant is : can i reduce the power consumption reducing the frequency of a pwm ?

and:

1) i am using the pwm to create a breathing feeling in a couple of LEDs. Which is the correct frequency for that ? ( because i am using randomply 1Khz)

Thanks

RE: Timer interruption and pwm power consumption

haakonsh — Tue, 23 Jun 2020 08:41:04 GMT

There are too many variables to give you any accurate numbers, you're gonna have to actually measure it.

Variables:

VDD
Load impedance
GPIO drive strength
Frequency
Temperature
PWM driver implementation
The state of the MCU at any given point in time.