Wemos D1 mini doesnot power up

[goxofy]

Hi thanks @nordeep , I have a 4-pin pwm fan and I connected the wire follow the schema picture,but my wemos di mini doesn't work, it seems like doesn't power up , I measured the 5v and GND pin voltage of the d1 mini with a voltmeter and it showed 0v, so did I do something wrong? Thanks again.

[nordeep]

You need to power up Wemos from separate PSU. Micro USB +5V or direct +3.3V to Wemos pins.

чт, 18 авг. 2022 г., 05:30 TinK @.***>:

Hi thanks @nordeep https://github.com/nordeep , I have a 4-pin pwm fan and I connected the wire follow the schema picture,but my wemos di mini doesn't work, it seems like doesn't power up , I measured the 5v and GND pin voltage of the d1 mini with a voltmeter and it showed 0v, so did I do something wrong? Thanks again.

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[goxofy]

Hi @nordeep I understant now! But if I want to use direct +3.3V, what shoud I do? Could I connect the separate +3.3V and GND to the Wemos 3.3V and GND Pin?

[nordeep]

Yes, you have to power up Wemos by connecting +3.3V and GND.

чт, 18 авг. 2022 г. в 09:53, TinK @.***>:

Hi @nordeep https://github.com/nordeep I understant now! But if I want to use direct +3.3V, shoud I connect the separate +3.3V and gnd to the Wemos 3.3V and GND Pin?

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[goxofy]

@nordeep But in the diagram, the +3.3V and GND has connected to the Logic Level Converter and MOSFET VCC, shoud I connect the PSU with this together?

[nordeep]

No, better is to power Wemos D1 through onboard micro usb. But, if you want to power up Wemos by +3.3V you always may done this by connect you +3.3 PSU to Wemos pins.

чт, 18 авг. 2022 г., 11:24 TinK @.***>:

@nordeep https://github.com/nordeep But in the diagram, the +3.3V and GND has connected to the Logic Level Converter and MOSFET VCC, shoud I connect the PSU with this together?

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[goxofy]

OK Thank you very much

[goxofy]

Hi @nordeep ,

I have another question about the software part, my fan is a 60W(12V 5A) violence fan with 13000 RPM, I use a 72W(12V. 6A) power supply for it, now it seems like works but the blade only shake a liitle and then stoped when I press Turn_ON button, should I change the yaml code to correct it?

[nordeep]

It seems you need to adjust PWM frequency but it's better to read datasheet for your fan.

[goxofy]

It seems you need to adjust PWM frequency but it's better to read datasheet for your fan.

ok thanks a lot