3 replies to this topic

[joshminer]

So my setup is using an LEDWIZ with a 16 channel Sainsmart relay board. 
When I hooked up the Atwood 4000 fan to the relay board it would rapidly click on and off creating a buzzing noise.

So I decided to purchase a mofset board and wire the fan through that, instead of wiring it through the relay board.

 

It works well, but the issue is now the fan is weaker than it is when I just plug it into the power supply normally.

I made a few quick videos of the problem.

 

Here is the mofset I bought.

https://www.aliexpre...o2usa4itemAdapt.

 

Wiring Diagram of the way I have this setup.

(I used the setup and mofset that Outhere suggested in his shaker motor setup post)

(I know the diagram shows a shaker motor. But the fan hooks up the same way. Just pretend its the fan. So I didn't remake the diagram.)

https://imgur.com/a/9nFuPB5

 

Video 1

https://www.youtube....h?v=n560NePcbt0

 

Video 2

https://www.youtube....h?v=Zj0n8fVePOI

 

I tried to adjust the Min/Max intensity to 48/48 so I could just leave it in the relay board. Like Terry Red did in his setup, But for some reason it would still click on and off. The intensity change in Dof-Config didn't affect the tables at all.

 

I thought I should check the amperage when its hooked straight to the power supply and while its hooked through the Mofset/Ledwiz and see if its any lower through the whole setup.

Worse case I can just accept it the way it is, But I would really like to see this thing be able to go full blast on Twister and Whirlwind.

 

If anyone has any suggestions that would be greatly appreciated.

Edited by joshminer, 16 September 2024 - 02:03 AM.

[DDH69]

As orientated in in your diagram, check the middle connection top right hand corner, I can't see on the image, but it probably says "VCC".  This is normally connected to 12V.  Check the instructions for the board.  I've never used a pre-made board (as I make my own), but as you can see from my circuit diagram below, the +12V is relevant on the output side of things. You need it to "switch" the -ve.

 

 

 

Attached Files

•  ExpansionBoardCircuitSnip.zip   4.2KB   4 downloads

[fhjui]

DDH69 is correct. There is the +12V missing. This supply voltage  is necessary for the collector of the opto transistor and to light up the control LED.

look here for the very detailed description of this board :https://www.icstatio...tor-p-8899.html

The input side with the opto is low level active. As I remember the ledwiz output was open collector, that seems to fit (10 years ago)

Edited by fhjui, 16 September 2024 - 01:27 PM.

[joshminer]

Fixed.

Thanks guys.