LEDs are simple to add. Using the digital pins outputs 5V when on, 0V when off. Leds can be rated for 2.5V to 3V so simply pick a current value suitable and calculate the resistance needed for 2V. [V=I*R]

Also, if you are powering the LED from the EZ-B signal line, you won't need a resistor. You only need a resistor on the EZ-B if you are powering the LED from the +5 and GND. But if it is the signal line (where you can control on or off) then you don't need a resistor

Thanks Guys!!!

I remember seeing a tutorial on this web site on how to add them to the EZ-B.

If you know what I am talking about, please send me the link.

So if I am correct, you connect the ground to the ground and the psitive to the signal?

Thanks,

Chris

GND-Cathode (-) Signal-Anode (+)

Yes exactly as you have it.

Sweeeeettt!!!! Thanks!

Can I connect these in a series to one digital port or do i need to connect one LED to each digital port?

i really just want to connect two for the eyes and here are the LEDs i am planning on using:

10 mm Ultra Bright LED FW Supply: 3.5V (typical), 4V (Max) FW Current: 20mA

Let me know what you think of this LED, or if you can suggest other ones that i can use.

Thanks again for the help.

• Chris

Connect in parallel you can probably place 10 perhaps. I use a 7.4V 910mAh LiPo which gives me roughly 220mA on a port, I think. Those will work fine.

Sounds good. I am only going to have two LEDs for now so I think I should be fine.

You have been a great help, and I really appreciate it.

I will let you now how it all works out.

Thanks again.

• Chris

Hey orwnic82,

I heard that it is not good to wire LEDs in parallel. What do you think?