Jump to content

Buttonboard with LEDs


novski
 Share

Recommended Posts

Hi 

I have a question regarding the NG App. 

I have a bunch of Buttons that have a wrong layout of the LEDs. They are Parallel with different direction.

post-10711-0-54288900-1401481865_thumb.p

Now i asked the friends of microkontroller.net for advice and they say that it is possible to make a Array with a 74HCT595 and let them work in a H-Bridge way together and Pulse the two LEDs from each direction. 

 

Is that possible to do with the NG App?

 

Thanks

Novski

 

edit: this is the link. Its German sorry for those who don't understand... http://www.mikrocontroller.net/topic/335089?goto=3674282#3674282

Edited by novski
Link to comment
Share on other sites

Regarding the German discussion i linked above i now know:

Charlyplexing is not possible with HC595 because the Tristate OE! is one signal for all outputs. I didn't find a Chip with multiple OE until now. Exept makting a uC working as a HC595 there is no solution for this...

 

post-10711-0-76856600-1402128232_thumb.p

 

best regards

novski

Link to comment
Share on other sites

Regarding this Button that i can't use i made my decision to use the Sparkfun Button Pads again.

 

I now have some questions to RGB LEDs wiring. I want to use 3 Color LEDs. I can't find much information about that quite new feature. 

A found a drawing from Protodeck http://www.midibox.org/dokuwiki/lib/exe/detail.php?id=protodeck&media=protodeck:ledsdout.png

But i think it should be easier somehow without those NPN Transistors driving the Selection Lines. Did i mis a schematic somewhere or is there no documentation available yet?

 

Thanks for a hint..

novski

Link to comment
Share on other sites

The usage of source drivers (the transistors) is for pro users who want to get perfect results.

I'm unsure if this really makes a big difference.

It's more important that you try to keep the number of selection lines per matrix as low as possible (8 is acceptable, 4 is perfect)

 

Best Regards, Thorsten.

Link to comment
Share on other sites

Thanks TK.

I looked trou the parameters of NG .NGC and was surprised how much was added since i read that last time! Thats really a great work. Thank you so much.

 

i will have 3 selection lines and 8 rows with each color to get 24 RGB Backlit Buttons.

 

I didn't find a parameter to set the number of selection lines in the .NGC..?

necessary?

 

best regards

novski

Link to comment
Share on other sites

ok. I tried a bit around today but can't figure out how that all works.

I added a DOUT4 to my core and took one resistor Array out of it by making short connections where the Array resistor was before. Then i added this code to my NGC file:

# test D-OUT Matrix

DOUT_MATRIX n=2 rows=8 mirrored_row=0 inverted_sel=0 sr_dout_sel1=1 sr_dout_sel2=0 sr_dout_r1=2 sr_dout_r2=0

i connected a LED to D0 of SR3 (Cathode) and D0 SR4 (Anode). I loaded that code to my Core and the LED went ON.

I was surprised.

Then i tried to find out the command to lit a LED one by one and found that the normal LED comand: "EVENT_LED id=999 hw_id=16 value=127" makes i go dark. Value=0 makes it go on.

Can somebody explane me why its hw_id=16 and not 8 ?

Im confused

thanks

novksi

Edited by novski
Link to comment
Share on other sites

  • 1 month later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share

×
×
  • Create New...