I am working on an arduino-based custom board that has 2 1A LDO regulators. It's meant to take power from a wall wart and provide 3.3V on one rail and 5V on the other.
Currently, I have my FTDI Vcc input tied to the VIN rails, which are pre-regulator. That should work for the 3.3v regulator, but I don't think providing 5V to the input of a 5V regulator is going to work. What is the best way to tie the FTDI Vcc to the input of the 3.3v regulator and the output of the 5V regulator? Would a diode be enough? Is voltage drop going to be a problem?
Thanks in advance for any advice you can provide.
FTDI and voltage regulation
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- Franklin97355
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Re: FTDI and voltage regulation
The Arduino UNO does what you are trying to accomplish. Take a look at it's schematic.http://arduino.cc/en/uploads/Main/ardui ... ematic.pdf
Please be positive and constructive with your questions and comments.