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Topic: Star Trek Computer Help (Read 20811 times) previous topic - next topic

jameskirk

this is just for testing i guess i miss interpreted what power supply you were talking about...
I will be using a wall wart to final power...
Sorry about that...

1ChicagoDave


this is just for testing i guess i miss interpreted what power supply you were talking about...
I will be using a wall wart to final power...
Sorry about that...


Okay. Here's one that should do the trick for final project.

...if I did my math right.  :smiley-sleep:

http://www.adafruit.com/products/276


Osgeld

#33
Aug 31, 2013, 06:16 am Last Edit: Aug 31, 2013, 06:26 am by Osgeld Reason: 1
either (I can tell you from experience that some serious bulk customer needed something validated slightly out of spec, so after a bunch of testing everything coming off the line NOW  is validated to that detail, but everything else already out in the wild, though the exact same part, is not 100% guaranteed to meet the new spec, thus new part number, its kind of cool, like we have an allegro part, speced to us its the blahblahblah-N, N being the first letter of our company with one little minor diode change internal to the part)  

grab some (like 4-5) 523 (ish) ohm resistors

http://www.digikey.com/product-detail/en/SFR2500005360FR500/PPC536YCT-ND/597091

5 volts 2a is enough, I am calcing for 5 volts so keep around that, but with a 5 amp supply you should be able to run an entire bridge of these things and just keep it under the table during production
http://arduino.cc/forum/index.php?action=unread;boards=2,3,4,5,67,6,7,8,9,10,11,66,12,13,15,14,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,86,87,89,1;ALL

jameskirk

Did you get my last message about the TLC5916 chip???

Osgeld

yea see my 1 paragrpah blurb (or should I say endless ramble) at the top of my last post

in a nutshell either
http://arduino.cc/forum/index.php?action=unread;boards=2,3,4,5,67,6,7,8,9,10,11,66,12,13,15,14,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,86,87,89,1;ALL

jameskirk

Is there anything else I need to buy to make it work???
Do I need to buy different LED's since I don't know what the specs are for the ones that I have...

Osgeld

#37
Aug 31, 2013, 06:44 am Last Edit: Aug 31, 2013, 06:47 am by Osgeld Reason: 1
no, like I said power one up using a 150 ohm resistor behind a gel and take a test shot on camera, see how it looks under your lighting (not room lighting, camera lighting)

if you want to see what it looks like more to what I am calcing you need ~60 something ohm resistors, but that is not on your list, and honestly not going to make a HGUE difference

bulk el-cheap-o led's, you can abuse within reason cause, well you got a pile of them for practically nothing

you dont want to get nutty with them cause you need them to last, but generic best guess + common sense, this prop will last till your grand childern throw it away lol

the key is how good they look on camera since that is the goal
http://arduino.cc/forum/index.php?action=unread;boards=2,3,4,5,67,6,7,8,9,10,11,66,12,13,15,14,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,86,87,89,1;ALL

jameskirk

Where in the diagram do I put the 523 ohm resistors???
Thank You

Osgeld

#39
Aug 31, 2013, 06:58 am Last Edit: Aug 31, 2013, 07:00 am by Osgeld Reason: 1
I will whip up a schematic tomorrow for you

but its between pin 15 and ground of each driver
http://arduino.cc/forum/index.php?action=unread;boards=2,3,4,5,67,6,7,8,9,10,11,66,12,13,15,14,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,86,87,89,1;ALL

jameskirk

I ordered my stuff tonight...

Osgeld

I found this schematic online, its what you want (ignore the red, green, and blue markings since all yours are white), they have 1k going from 15 to ground which should provide a nice 20ma, the resistors I suggested getting would drive your LED's just a tad bit harder, but since they are going to be switched on and off they should be ok

http://www.elcojacobs.com/wp-content/uploads/2012/08/shiftpwm_tlc5916_RGB.png
http://arduino.cc/forum/index.php?action=unread;boards=2,3,4,5,67,6,7,8,9,10,11,66,12,13,15,14,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,86,87,89,1;ALL

jameskirk

Thank You so much...
How do we approach the code for the Arduino now???

Paul__B


I found this schematic online, its what you want (ignore the red, green, and blue markings since all yours are white), they have 1k going from 15 to ground which should provide a nice 20ma, the resistors I suggested getting would drive your LED's just a tad bit harder, but since they are going to be switched on and off they should be ok

http://www.elcojacobs.com/wp-content/uploads/2012/08/shiftpwm_tlc5916_RGB.png


Don't know what the idea of the 1K base resistor for the optional line drivers is.  As per previous comments on emitter followers,  it should never be necessary.

Osgeld

its not killing anything being there given the application though

PS: to jameskirk, ignore that optional part of the schematic, you wont need it
http://arduino.cc/forum/index.php?action=unread;boards=2,3,4,5,67,6,7,8,9,10,11,66,12,13,15,14,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,86,87,89,1;ALL

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