Substituting other LED lights / switches

[CCinBR200]

I just ordered the Basic kit from Dmitri and I'm excited about the build.

I plan to substitute a LED lighted latching switch for the one with the kit and a regular green LED for the red MIDI that comes with the kit. Is there anything special I need to do (e.g. add resistors) or can I just make the swap directly.

Thanks!

Carlo

[dmitri]

I'm not sure I understand the question but in any LED must have a current limiting resistor. The value of the limiting resistor should be:

R = (Vp - Vf)/Id

where
Vp - power or driving voltage.
Vf - LED forward voltage. For LEDs it's around 1V.
Id - LED current.

The lower the R, the higher I and the brighter the LED. Id must not exceed the LED's maximum current.

[CCinBR200]

This is the switch I want to use if I can:

http://www.amazon.com/Black-Button-Swit ... ing+switch


and I just want to substitute one of these for the red MIDI indicator light:

http://upload.wikimedia.org/wikipedia/c ... en_LED.jpg

I have the LED so if I can directly substitute, you can skip soldering the red LED.

Thanks!

[dmitri]

The MIDI LED is not soldered to the board so you can use one which comes with the kit or your own.

[CCinBR200]

Thanks, Dmitri.

I'm still interested in a lighted power switch. The ones I'm looking at have 4 pins, 2 for on/off and 2 for the built-in LED. They are 3v. Is there any place on the board I can connect the 3v + and the ground pin? If not, I can live without this feature but I think it looks cool.

[dmitri]

You'd better feed this LED from 5V with a limiting resistor of around 1K. You can take 5V from the power switch itself.

[CCinBR200]

Big thanks!