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There have been 78 items by Kermit (Search limited from 28-September 23)
#29279 General Utilities
Posted by Kermit on 16 May 2012 - 05:43 PM in General Discussion
#29049 TLC5940
Posted by Kermit on 14 May 2012 - 09:15 PM in General Discussion
#29024 TLC5940
Posted by Kermit on 14 May 2012 - 03:31 PM in General Discussion
#29022 TLC5940
Posted by Kermit on 14 May 2012 - 03:20 PM in General Discussion
#29012 TLC5940
Posted by Kermit on 14 May 2012 - 02:19 PM in General Discussion
#28941 TLC5940
Posted by Kermit on 12 May 2012 - 10:08 PM in General Discussion
#28858 TLC5940
Posted by Kermit on 11 May 2012 - 09:42 PM in General Discussion
#28851 TLC5940
Posted by Kermit on 11 May 2012 - 07:17 PM in General Discussion
#28848 TLC5940
Posted by Kermit on 11 May 2012 - 06:29 PM in General Discussion
#28831 TLC5940
Posted by Kermit on 11 May 2012 - 03:55 PM in General Discussion
#28815 TLC5940
Posted by Kermit on 11 May 2012 - 12:33 PM in General Discussion
#28805 TLC5940
Posted by Kermit on 11 May 2012 - 10:10 AM in General Discussion
#28785 TLC5940
Posted by Kermit on 10 May 2012 - 08:45 PM in General Discussion
#28780 TLC5940
Posted by Kermit on 10 May 2012 - 05:55 PM in General Discussion
#28770 TLC5940
Posted by Kermit on 10 May 2012 - 11:37 AM in General Discussion
#28759 TLC5940
Posted by Kermit on 09 May 2012 - 09:28 PM in General Discussion
#28756 TLC5940
Posted by Kermit on 09 May 2012 - 09:09 PM in General Discussion
#28748 TLC5940
Posted by Kermit on 09 May 2012 - 08:22 PM in General Discussion
#28747 TLC5940
Posted by Kermit on 09 May 2012 - 08:16 PM in General Discussion
#28745 TLC5940
Posted by Kermit on 09 May 2012 - 08:14 PM in General Discussion
Goedenavond
According to the schematic, it's not such a difficult set-up.
The 2k2 resistors are, according to the description "to make this board suitable for use with servos".
This is really strange: at the end of page 14 of the datasheet (http://www.ti.com/li...ink/tlc5940.pdf) there is the formula to use for the resistor.
Iout = 39.06 / R (simplified)
with the range of 5mA and 120mA.
I use a 100 Ohm resistor (but I could never light any led!) giving an output of 39mA, with your resistor you should have 0.017mA, way under the lower limit.
Are you sure there are no other components wired to Iref?
Andrea
#28738 TLC5940
Posted by Kermit on 09 May 2012 - 07:16 PM in General Discussion
#28734 TLC5940
Posted by Kermit on 09 May 2012 - 06:55 PM in General Discussion
#28733 TLC5940
Posted by Kermit on 09 May 2012 - 06:54 PM in General Discussion
Ok, let's start with that. I think the driver will need some work still. I'll post code and pictures when I get back home tonight.
I hope to find you online... in which timezone are you? What do you mean by 'tonight'? :-)
Andrea
#28712 Modbus-TCP is now for Windows Phone too
Posted by Kermit on 09 May 2012 - 12:04 PM in Project Showcase
#28710 TLC5940
Posted by Kermit on 09 May 2012 - 11:29 AM in General Discussion
I'm working on a driver for the Tlc5940 for Netduino. I use the PWM ports from the Netduino to control the BLANK and GSCLK cycles, and the output looks pretty smooth to me, no flicker whatsoever. I have a GSCLK period of 2 microseconds, BLANK on 4096 times that, so roughly 10 ms per PWM cycle. Communication on the SPI port runs at about 40 MHz (if I can believe the documentation ), I don't see any noticable interruptions when switching the signals.
I use a shield from Sparkfun, not all pins are exposed there (notably VPRG), but for now it'll do. I actually wanted to ask if there is anyone interested in code like this. Maybe I should just put it on Sourceforge?
...mmmmmmm... why do you think I could be interested? :-))))))))))
Apart from jokes, I already thank you so much, moreover, I hope you can share the schematic too, I'm only a software guy, and I found a lot of problems to wire cables and components correctly...
I'm *really* waiting for you! :-)
Thanks again
Andrea
P.S. You can also attach files just here... :-)
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