Yes, the signal pin does put out 5v, but only about 20mA (I think anyway) or so.... You have to make sure the Led you're talking about doesn't draw more that that...

ah thank you.i both this one. leds

Most hobby class micro controllers accept /output 3.3v to 5 volts. The last time I checked ezb v3 it output 4.75 volts. If you use leds make sure 5v won't pop them , red and ir leds are lower voltage and would pop at that voltage . Water clear 5mm Blue, white, yellow, green are 3.2 to 3.7 volts average so you can get away with one of those.

i got an orange led and yellow on 3 volts .bolt pop.

You will need to pwm them or add a resistor , 100 Ohm I believe . You can also use pwm to dial back the voltage. If 100 percent on pwm is 5 volts then you probably want to dial it back to 70 percent. Or like I said you can use a resistor too. Verify what voltage it outputs with a meter to be sure. Run the voltage at the highest recommended for the led so that it doesn't look like it is blinking.

ah yes.thanks

If you are putting an led from a v3 digital output to GND, you do not need a resistor. The output only puts out about 25 milliamps, it is self limited. You would need a resistor if you are putting a led between 5V and GND though. For example if you were putting a led between 5V and GND then you would take the LED voltage drop, usually 1.5 V and minus it from the 5 V. This leaves 3.5 V, divide this by 25 milliamps (.025) and you get 140 Ohms. This would be the value to get the full .025 amps or 25 milliamps for the led (full brightness). A 1 kohm would work but your led may be dim. 3.5 V divided by 1 kohms = .0035 amps or 3.5 milliamps. That's the beauty of the v3 ezb, you can just put leds on your digital outputs with no worry or calculations. Good luck.

great