Dimmable constant current LED driver

Augusto Montes's picture

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Joined: Oct 01, 2020

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Dimmable constant current LED driver
October 1, 2020 - 5:32am

Hello everyone

I want to drive an LED circuit (already have it, on a fan/light fixture) that was driven with a very strange combination of two drivers (pictures), the second of which had a bluetooth module that also had audio and allowed control with an app.

The thing is, the second module died, and I want to replace it with a NodeMCU as controller, and some dimmable constant current driver (as the original one). The problem is, I don´t know the total load of the circuit (so I drew it) nor if I could use a constant voltage driver and mosfets AND, if I use a dimmable driver, what is the correct way to control it with a Node MCU? (meaning hardware, since I think I´ll be using ESPHome or Tasmota)

What solutions can I use?

 

Thanks a lot

Augusto Montes's picture

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Joined: Oct 01, 2020

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Image of the circuit looks awful (and it seems I can´t edit he post), so...

 

Debashis Das's picture

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Joined: Dec 02, 2019

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Can you please provide us with any information/pictures of the device. and if you are able to draw out the leds we assume you have succesfully tear down the device. can you also provide the pictures.

Sourav Gupta's picture

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Joined: Feb 12, 2018

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Not sure about the voice feature, but you need a constant current source driver that supports strings of lights along with the PWM or Analog dimming capabilities. Texas Instrumnets has very good source oof such drivers. You just identify single LED forward current and forward voltage.