Nanokontrol led help

[MrPopinjay]

I love these threads. Every single time I swear I'm going grab a soldering iron and put that GCSE in systems & control technology to use :P One day... Maybe...

[MiL0]

so how do the LED's work then?

Are they merely activated when a button is pressed? If so, what happens when you send midi data to the button to turn it on and off? doesn't the LED change state then?

[MrPopinjay]

They light when pressed or toggle on off depending on whether you set the buttons to be momentary or toggle in the nano software editor thingy.

[extraclassic]

How many LED's are you gonna be using?
Looking at the board you can see the resistors near the LED's, just check they are the right ones, I can't see the colour bands properly.

I want 1 led per button so that's 24 buttons plus 1 scene button that cycles through 4 led's making a total of 28 led's
Do the last couple of pictures help you determine what type of resistor they are?

Thanks again Nicky for the all the info. I'm going to do some research on resistors and led's now

[MiL0]

They light when pressed or toggle on off depending on whether you set the buttons to be momentary or toggle in the nano software editor thingy.

But do they toggle on and off when you trigger the button via midi? I realise the LED itself doesn't have a midi input but perhaps the associated button does...

[MrPopinjay]

No, as far as I can tell no data goes from the computer to the controller. Also it doesn't remember the arrangement as you switch between scenes so a toggled on button will display as an off and requie a few presses to return to the state it was set to.

I avoid using the scene change button to be honest.

[MrSteve81]

Where did you solder to? I found the easiest way was like this.

This is the top row of buttons.

That's exactly where I've got them. I think I need to get thinner wire.
And I'm with all the other geeks on here. I love pictures of wiring.

[Nicky H]

Do the last couple of pictures help you determine what type of resistor they are?

Thanks again Nicky for the all the info. I'm going to do some research on resistors and led's now

Not really - it's a bit blurry - I can see the orange band thats it..

How many LEDs were originally on there?

If there was less than 24 you will need to rewire your circuit anyway.

You will need 12 of these:
http://www2.cricklewoodelectronics.c...roductid=15983

Wired like the attachment pic.

Total draw when all on is 218mA - well below USB spec.

[extraclassic]

How many LEDs were originally on there?

There is 24 buttons with 1x surface mount led's underneath plus there is 1 button used for changing the scene that cycles through 4x 3mm red led's.

You will need 12 of these:
http://www2.cricklewoodelectronics.c...roductid=15983

What about the resistors that are already on the board?
If i was to use red led's would that save me having to add resistors?

[Nicky H]

I didn't realise there was already 24 on there...

You should be fine mate - the white/blue/bright green have a higher forward voltage so stick to red/yellow/orange

The board will already be wired correctly for this.