Wiring up a fan (electronics)

Discussion
1

Helloo

I am currently looking at getting a fan wired up for a laminar flow hood I’m building, and I’m rather out of my depth on the electronics! I was thinking of popping down to an electronics night but thought it may be better to get some insight on necessary components/etc before hand. Any guidance would be immensely appreciated.

Fan spec sheet here: https://www.mouser.co.uk/datasheet/2/120/K3G190_RC05_03-2940370.pdf

Ideally the fan will be mains powered, potentially with speed adjustment wired in. Initially this seemed fairly simple, connecting up a mains plug with the controller in series, but after picking up the fan, I’m not so sure!

There’s a 3 out (mains wiring) and a 4 out. Diagram seems to suggest that the 4 out is for an interface.

I’m not fussed about utilising an interface (other than controlling the speed), but I assume it wouldn’t be correct to just leave the crimped wires in situ…! Any advice on how to go about wiring up to mains, with a variable speed controller would be amazing.

Thank you :slight_smile:

I’ve included the spec sheet.

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2

Sorry you had to post this twice.

I’m definitely not an expert on this type of controller but from a quick read through, the fan needs both power and a controller to tell it how fast to spin.

You can either buy a controller, or make one.

On a quick read through, the controller needs to output 10V as a PWM (pulse width modulation) signal.

I have 12V PWM modules which will probably work at 10V, but will need a 10V power supply.

Very happy to try and help you with this.

I may not make it electronics night this week, I have to go to Somerset and not sure what time I’ll be back.

3

I would go with the 10k pot option in the bottom right corner of the 4 options.

4

That’s a good plan

5

Thank you so much for responding! And no worries about posting twice, I realised the time I posted was when everyone was probably out enjoy the sun haha.

Just to clarify, I should pick up a 10K potentiometer alongside a 10V power supply?

No worries about making it this Thursday as I need to order these things anyway :slight_smile:

6

If you go with Kyle’s solution, you only need the potentiometer. The diagram labelled “Customer circuit” shows you four options to choose from.

1 Like
7

Okay, awesome! I’m a little ropey at circuit diagrams, but the 3 out will still just be wired up to a mains socket then the potentiometer to the 4 out?

Thanks so much for the help - I’ll go and do some circuit diagram learning!

8

Con10, Con11 and Con12 are the ones that need to be connected to mains, yes.

And the pot simply lives there:

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3 Likes
9

Hey Jem! Shall I come in tomorrow evening for the electronics nights to try figure out this fan? :smiley:

10

Yes
I’ll bring a 10k potentiometer, just in case there aren’t any in the space.

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11

Should be there for around 7:20pm

12

I also have a 10k potentiometer but thank you for bringing one too!

13

Just wanted to say thank you again for this! The colours you put matched the wires and made it easier for @Jem when he helped me. We got the fan working wooo!

1 Like