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I want to use ESP32 to control and use a dimmer for 6 LED panels in my bedroom. The specification of each panel is mentioned in the diagram. Although in the diagram it shows ONLY 1 MOSFET and 1 LED Panel but in reality there are 6 LED Panels therefore I am guessing that each of the 6 LED Panel will need a separate MOSFET.

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I would like to know:

  1. What MOSFET (Part number or model number, company name, etc) should I use for the above LED panel connected with ESP32 (I guess voltage of ESP32 is 3.3 v) ?

  2. Will each LED panel need separate MOSFET (6 LED Panels will need 6 seperate MOSFET) or can 1 MOSFET be connected to all 6 LED Panel ?

  3. If I am using 6 LED Panels what should be the specification of Power Supply (Voltage & Amps) ?

  4. If I use 6 set of MOSFET & LED Panels, can all MOSFETs be connected to a single PWM pin in ESP32 or does each MOSFET needs to be connected to separate PWM pins in ESP32 ?

  5. Is the above circuit okay, or would you suggest some other components to be added apart from MOSFET?

  6. What will be connection between power supply, LED and MOSFET. I am guessing that 'Positive of Power Supply --> Positive of LED Panel', 'Negative of LED Panel --> Source of MOSFET' and 'Drain of MOSFET --> Negative of Power Supply'. Kindly correct me if I am wrong.

Thanks.

To add more information regarding the LED panel:

  1. It is 15W LED Panel (note it is not LED Bulb or LED Strip). Link to LED panel is 15W LED Panel

enter image description here

  1. Below is the picture of Driver that came with the LED Panel, note the below driver is non-dimmable.

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Kindly help.

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  • please provide a link to the datasheet for the LED panel .... if that is not available, then make and model of the LED panel .... or a web link to where it is sold
    – jsotola
    Oct 28, 2018 at 6:14
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    how do you want to dim a LED bulb with working voltage from 150 to 260 V? It will turn off under 150 and have full light over 150 V. it has a switching AC/DC power supply inside. use DC LED strips for the panel
    – Juraj ♦
    Oct 28, 2018 at 6:25
  • Hi Juraj, It is not LED bulb, it is a LED ceiling panel. I have added below more detail of the LED panel and picture of the original driver that came with the LED Panel. Note that the original Driver is non-dimmable.
    – Hira
    Oct 28, 2018 at 17:19
  • bulb or panel, it is the same principle for 'AC LED' . the LED bulb has the driver build-in. for the panel you could replace the driver, but it is not easy to do it right and sure not a question for Arduino SE. perhaps it is easy, only connect the DC side with the MOSFET and use PWM, but I can't tell if the driver likes it
    – Juraj ♦
    Oct 29, 2018 at 6:22

1 Answer 1

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Your plan has more flaws. First as Juraj wrote in a comment, you can't dim a switching power supply of the LED bulb. But this would not work as you plan even if you use a classic incandescent light bulb with AC. You can't control it with PWM. AC is dimmed with phase control, which requires a zero crossing detection to turn off power for part of the AC wave.

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  • Hi, it is not LED bulb, it is a LED ceiling panel. I have added below more detail of the LED panel and picture of the original driver that came with the LED Panel. Note that the original Driver is non-dimmable.
    – Hira
    Oct 28, 2018 at 17:21

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