LED dimmer circuit using hall effect thumb wheels

[Rich.]

Hi all, im trying to design a very sleek dimmer circuit to power the interior lighting of my expedition vehicle.

The interior lights are being replaced with 36SMD led panels inside of the dome housings. Now, im looking for a very low profile method of dimming them, whilst still having an on off function with the existing door opening ect.

The lights are map lights, so one for driver, one for passenger.

What i would like is for them to be on as 50% as standard, with the ability to use hall effect thumb wheels to either dim them or brighten them from here.

What i came up with so far was;
866536.pdf

These thumbwheels with;
BuckPuck.pdf

These buckpuck drivers (Im unsure which one yet, as the leds haven't arrive to measure their power consumption, im expecting around 700ma per panel)

Now, from what i can gather, these drivers set brightness depending on a permanent voltage to the 0-5v source, with the thumb wheels i have chosen, they have a spring to centre reset, which is at 0v, then minus 5v in either way, meaning they would only work when im holding the thumbwheels in one direction, not as a 'flick the thumbwheel to turn the brightness up abit'

Can anyone confirm my thinking and suggest a method of using these thumbwheels to achieve what im looking for?

Thanks
Rich

 

[panic mode]

your links are not working

 

[dr pepper]

Same here

 

[Rich.]

Apologies for the bad links, these are the thumbwheels;



And these are the drivers;

https://www.ledsupply.com/03021-d-i-700.php

Thanks
Rich

 

[ronv]

Yep, you need something to remember where you moved the wheel before it snapped back. If the 50% on at start up is not to important you could use something like this that stays where it is left.

https://www.mouser.com/ProductDetai...cgDuR/nYt2jDAKYon1y9uIqxGf8CYQ6pMitU0uCXmzA==

I thought I responded to this. Didn't know there were two posts. I feel better now.

 

[dr pepper]

Stil broken links, sounds like a job for a microcontroller though, as you have analogue led drivers and you want to interface them to digital switches.

 

[Rich.]

**broken link removed**

It wont let me link to pdf's for some reason, the brocue for them is on the above page.

The problem with using something linear is having to make a slot in the centre console with would be abit large.

Thanks
Rich

 

[dr pepper]

Thats better.
The switches look very professional, and they have a volatge o/p, we all thought that they'd be a switch o/p from reading the threads.
Must be a linear hall device internally.
They probably will work with your dimmer pucks if they accept a 0-5v input signal, the only issue is the impedance but I'dve thought thats not gonna be a problem, your only real issue would be a supply for them, you could chuck something togther using a 7805 or maybe disect a nokia car charger I think they chuck out 4.7v.