How to use with PCA9685

[Linkdudu]

Hey, first of all, thanks for putting this in place, amazing work!

I would like to know how I can use this with PCA9685, my idea is to use the PCA9685 to control 8 relays and 8 led strings using a mosfet, so for the realys basically I need ON and OFF but for the LED the idea is to be able to have them ramp up and down on pragramable time (small reef aquarium projetc).

Thank you!

[mheidenreich]

I have not tried the PCA9685 module yet with Raspberry Pi. From what I see, it is designed to control LEDs. You mention using MOSFETs - that is definitely a good idea as multiple LEDs would likely draw too much power from the controller directly. Controlling relays with the same controller may work, just don't forget the flywheel diodes. I would be interested how that project turns out if you decide to go for it.

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On Sat., Nov. 27, 2021, 10:37 a.m. Carlos Eduardo Guimarães, < ***@***.***> wrote: Hey, first of all, thanks for putting this in place, amazing work! I would like to know how I can use this with PCA9685, my idea is to use the PCA9685 to control 8 relays and 8 led strings using a mosfet, so for the realys basically I need ON and OFF but for the LED the idea is to be able to have them ramp up and down on pragramable time (small reef aquarium projetc). Thank you! — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#2>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ASJ3XOKNNOOBULL4KE5Q5X3UOD3LTANCNFSM5I4JUWFQ> .

[Linkdudu]

The electronic is already working at some level, the challenge that I was not able to overcome is that for the pca9685 python driver, you have to specify the pulse length in hex going from 0 to 0xffff and I was not able to translate your 100 values table or function to match that. As for the relays, I'm using the 8 relays model that is already protected, so is working fine so far.

[mheidenreich]

It's hard for me to say without trying it with the actual controller. My lookup table goes from 0 to 1 so the only thing I can suggest is to multiply these values by 0xFFFF.

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On Sat., Nov. 27, 2021, 2:33 p.m. Carlos Eduardo Guimarães, < ***@***.***> wrote: The electronic is already working at some level, the challenge that I was not able to overcome is that for the pca9685 python driver, you have to specify the pulse length in hex going from 0 to 0xffff and I was not able to translate your 100 values table or function to match that. As for the relays, I'm using the 8 relays model that is already protected, so is working fine so far. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#2 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ASJ3XOIEDK4EQAPTJBRRE63UOEXCDANCNFSM5I4JUWFQ> .