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Virgule

RGB power button switch

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Posted · Original PosterOP

Hello,

 

I was thinking of modding my Lian-Li PC-O11 Dynamic with a RGB Vandal switch.

 

I purchased this :

https://www.digikey.ca/products/en?keywords=PV6F240NN-3R1

which has an illumination voltage of  1.8, 2.8, 2.8 VDC (not sure why multiple values are listed) and a voltage rating of 48VDC. I have the Z390 Aorus Pro Wifi and after a bit of research, I'm pretty sure most motherboard RGB headers are 12V. My plan was to use one of my mobo's RGB header to power the switch's LEDs.

 

I also have a few resistors :

https://www.digikey.ca/product-detail/en/yageo/SQP500JB-1R0/1.0W-5-ND/18631

 

This is the switch's wiring diagram:

image.png.dda55f18c829972015598e599fdeccfe.png

 

Can I just connect my LEDs to the mobo's header ?

Do I need to put resistance on those paths ?

What do I connect the negative terminal to ?

 

Thanks


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Posted · Original PosterOP
2 minutes ago, James Evens said:

Add resistors to it. 

Is 1 Ohm enough ?

 

2 minutes ago, James Evens said:

Also you need to swap somehow common annode/kathode.

What does that mean ?


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1 minute ago, Virgule said:

Is 1 Ohm enough ?

Sounds to little.

R=U/I

U=12V-LED voltage

I= led current

 

2 minutes ago, Virgule said:
4 minutes ago, James Evens said:

Also you need to swap somehow common annode/kathode.

What does that mean

Mobo:

+12V

RGB minus

 

your button:

common minus

separate +Vss LED

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Posted · Original PosterOP
4 minutes ago, James Evens said:

Sounds to little.

R=U/I

U=12V-LED voltage

I= led current

 

U=12V-2.8V=9.2V

I_max=2A (current rating, actual current probably less)

R_min=9.2V/2A=4.6 Ohm

 

7 minutes ago, James Evens said:

Mobo:

+12V

RGB minus

 

your button:

common minus

separate +Vss LED

Here is the mobo RGB header layout :

image.png.57df07c5187d53bf4384f5788be87baf.png

 

Can't I just connect :

RGB minus (mobo, 2 to 4) to RGB (switch)

12V (mobo) to minus (switch)  with 4-5 Ohm resistance 

?


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26 minutes ago, Virgule said:

I_max=2A (current rating, actual current probably less)

and the magic smoke escapes

I guess the 2A are for the button. LED should be somewhere around 10 mA.

 

28 minutes ago, Virgule said:

Can't I just connect :

RGB minus (mobo, 2 to 4) to RGB (switch)

12V (mobo) to minus (switch)  with 4-5 Ohm resistance 

?

No. Now you reversed polarity.

How about adding some transistors or logic chips?

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Posted · Original PosterOP
18 hours ago, James Evens said:

and the magic smoke escapes

I guess the 2A are for the button. LED should be somewhere around 10 mA.

 

No. Now you reversed polarity.

How about adding some transistors or logic chips?

I tested each LED with a 9V adapter with resistor. The only way each LED turns on is with + to a LED and - to common. So this means on my motherboard, each RGB pin is a ground and the polarity is reversed. I think I get it. I'll look for a different switch or a common cathode RGB controller. Any leads on that, let me know.


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Posted · Original PosterOP
On 12/6/2019 at 4:06 PM, James Evens said:

Quick sketch.

(snip)

While trying to decipher your sketch, I found this switch :

https://www.digikey.ca/product-detail/en/schurter-inc/3-101-403/486-3352-ND/7104548

 

Page 3 of the datasheet shows the assignment of each wire.

Wire 1 is labeled as Vin = 5 VDC...28 VDC

Wire 5 to 7 are the RGB LEDs and are labeled as LED red GND = ON Open* = OFF

 

This tells me this switch is a common anode switch where the RGB terminals are grounds. This matches my Mobo RGB header pinout. Also, 5 to 28 VDC illumination voltage means I wouldn't be required to reduce voltage to my switch.

 

Is my understanding correct ?

What should I do with wires 2, 3, 4 & 8 ?

Should I use wires 2 & 3 for power switch - & + (respectively) ?


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Posted · Original PosterOP
3 hours ago, James Evens said:

If you can justify the price tag. Yes.

I found a cheaper option, just some lack of information on the distributor's page. Overall it's a cheap option even considering it's coming from UK. I'll call them tonight to validate they are common anode. I'll keep the thread posted.

 

https://www.switchelectronics.co.uk/switches/push-button-switches/vandal-resistant-switches/rgb-illuminated-vandal-resistant-switches


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3 hours ago, Virgule said:

Thanks, this is exactly what I'm looking for. There's even a choice of both polarities for all the color configurations. Very neat seller.

ya np. i was going to buy it and still might. if you do get it let me no how to hook it up to rgb. i have corsair ecosystem so no rgb only argb but there is a convertor to go rgb so ill have to get that costly but only option.

 

other option is to go aqua computer as they support corsair fans and have both rgb and argb.

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Posted · Original PosterOP
21 hours ago, Virgule said:

I found a cheaper option, just some lack of information on the distributor's page. Overall it's a cheap option even considering it's coming from UK. I'll call them tonight to validate they are common anode. I'll keep the thread posted.

 

https://www.switchelectronics.co.uk/switches/push-button-switches/vandal-resistant-switches/rgb-illuminated-vandal-resistant-switches

 

They have confirmed the switches are common cathode. So no go.

 

 

10 minutes ago, thrasher_565 said:

ya np. i was going to buy it and still might. if you do get it let me no how to hook it up to rgb. i have corsair ecosystem so no rgb only argb but there is a convertor to go rgb so ill have to get that costly but only option.

 

other option is to go aqua computer as they support corsair fans and have both rgb and argb.

I ordered them but it's a long lead time as they come from China. I'll open a new thread with the details of the mod project.


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