Wiring up a fan (electronics)

#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.

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#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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#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!

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