[SOLVED] Nodemcu 12 volt LED dimmer?

Solved
1

Hi friends. is it possible to dimming 12 volt LED with nodemcu ? which driver I need ? ULN2003 or ? is any example ?
thanks

2

This is not Blynk specific issue… however…

Any PWM example will work, no fancy “high voltage drivers” required ;).

All you need is to step-up the TTL signal to something else (preferably isolated to protect your MCU) capable of the 12v and do so with a fast enough frequency to keep up with the PWM pulse. A darlington may work, or a MOSFET or Optocoupler, etc.

Just Google for word combos like Arduino NodeMCU PWM 12v etc.

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3

thanks for reply. can I changing blow schematic to dimming 12 volt DC ? blow schematic is AC dimmer

4

And I say so again… not really relevant for this forum. Besides some AC and DC circuits are significantly different enough, that I wouldn’t bother… just find an instructable on the internet about dimming 12v lights with Arduino.

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5

gunner you are right but as he is blynker lets help him , below is my my RGB LED schismatic , i use STP16NF06L MOSFET if you will use a signal color LED strip you will need only one MOSFET.

image.png551Ă—508 4.11 KB

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6

thanks for reply. is any emergency for STP16NF06L mosfet ? STP16NF06L is not available in our country !
whats your sketch used for this hardware ?

thanks

7

aliexpress or ebay is your friend , or search for a N channel MOSFET with Low Gate voltage (1.5 V ~ 2.5 V) which can handle the required Amps for your design

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8

you can use tip120, irf630, etc, etc, for this.

study here:
http://bildr.org/2012/03/rfp30n06le-arduino/

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9

Something like this could be useful for you:

0-24 V Mosfet IRF520 http://s.aliexpress.com/iyaYF3yi

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10

I was helping :wink: I just didn’t have any significant circuit layout on hand to offer. The OP can search for one just as easily I could, but unfortunately tends to ask instead. But that’s the benefit of the rest of the forum users here, to offer a diversity of information to those that ask :smiley:

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11

OK the problem solved with ULN2003APG
thanks

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