X xtech007 Senior Member Oct 20, 2014 #1 Quick question; Related to RGB leds, constant current sink means common anode?
hippy Technical Support Staff member Oct 20, 2014 #2 "Sink" usually means current into a 'thing' then to 0V so I would have thought it related to common cathode when it came to an RGB LED. Code: R ---|>|---. G ---|>|---{ B ---|>|---{ _|_ 0V
"Sink" usually means current into a 'thing' then to 0V so I would have thought it related to common cathode when it came to an RGB LED. Code: R ---|>|---. G ---|>|---{ B ---|>|---{ _|_ 0V
X xtech007 Senior Member Oct 20, 2014 #3 thanks hippi! I would tought so too! So its commo cathode? Planing to use TLC5940, so I can place a order for the RGB, but was not sure which one CC or CA.
thanks hippi! I would tought so too! So its commo cathode? Planing to use TLC5940, so I can place a order for the RGB, but was not sure which one CC or CA.
hippy Technical Support Staff member Oct 20, 2014 #4 A datasheet for the TLC5940 appears to be here ... http://www.ti.com/general/docs/lit/getliterature.tsp?genericPartNumber=tlc5940&fileType=pdf That shows it has LED drive lines which are "sinking" ( equivalent to open collector ), so the RGB LEDs it would be used with would need to be common anode.
A datasheet for the TLC5940 appears to be here ... http://www.ti.com/general/docs/lit/getliterature.tsp?genericPartNumber=tlc5940&fileType=pdf That shows it has LED drive lines which are "sinking" ( equivalent to open collector ), so the RGB LEDs it would be used with would need to be common anode.
X xtech007 Senior Member Oct 20, 2014 #5 thanks Hippy! Once again thanks ! Place an order of 20 CA RGB leds. Soon will start to learn to control.
thanks Hippy! Once again thanks ! Place an order of 20 CA RGB leds. Soon will start to learn to control.