Hello!
I plan to use a TLC5940 in a project and I found this in the Playground: Arduino Playground - TLC5940
Everything is fine but I wonder what this 2k resistor is for, they calculated here: http://students.washington.edu/acleone/codes/tlc5940arduino/img/breadboard-arduino-tlc5940.png
Where do the 39,06V come from?
Or is there anything else I have missed?
And1G:
Everything is fine but I wonder what this 2k resistor is for, they calculated here: http://students.washington.edu/acleone/codes/tlc5940arduino/img/breadboard-arduino-tlc5940.png
It's the "IRef" resistor which determines the output current for an individual pin. See the first graph on page 10 of the datasheet.
And1G:
Where do the 39,06V come from?
Equation 3 on page 5. 31.5 * 1.24 = 39.06.
Where do the 39,06V come from?
It is actually derived from the gain of the internal circuitry and nothing you could derive yourself. It is a manufacturers design figure.
OK, thank you! It seems I did not see this...
