Number of LED Ultimate IO

[meduza]

Hello there, I want to know how many 20ma LED I can connect (safely) to the ( + ) anode and cathode?
Basically I what to have two (and also four) LEDs connected to the same Outputs (+RGB)

Parallel? serial?

Thank you

[obizues]

Hello there, I want to know how many 20ma LED I can connect (safely) to the ( + ) anode and cathode?
Basically I what to have two (and also four) LEDs connected to the same Outputs (+RGB)

Parallel? serial?

Thank you

Not sure if this helps but...

From Ultimarc:
“The voltage required depends on LEDs being used but all LEDs supplied by Ultimarc require 5 volts and the supplied power cable is pinned for 5 volts.
Current requirement is 0.02 amps X number of LEDs. Note each RGB LED counts as  3 LEDs.”

Or are you asking if daisy-chaining LED’s is going to somehow mess up your connector?

[AndyWarne]

The board has current-controlled outputs so if you connect in parallel the current will be shared roughly between them so they will be not full brightness.

So another method is series. But depending on the LEDs and whether they have series resistors you may need to connect the anode end of the pair to a voltage higher than 5 to give adequate headroom for the proper current to flow. Max voltage 12V.

[meduza]

Excellent, thank you guys!  , series with more voltage is what I assumed, have great day!