Is their a 3v analog and digital supply for my projects? I ask because the FTDI2232h will be sending high speed USB data from my sensors whale the maple clocks the data out of the sensors to the USB. So the maple would be running on battery and the ftdi ft2232h runs off 5v from the usb I beleive.
Is their a 3v analog and digital supply for my projects on the maple?
(3 posts) (2 voices)-
poslathian
LeafLabsOn the bottom header you have Vin and Vcc. Vin will copy whatever your power source is (5V from USB, or 3.6-4.2 from the Lipo, or 7-18V from the external wall wart) and Vcc will give you the 3.3V regulated digital supply. The new rev5's (not out yet) offer up a Vdda on that header bank too which gives you regulated 3.3V as well, but this time off the analog regulator instead of the digital. This is useful if you want continue to maintain power separation between analog and digital domains if your shield has outboard ADC's or something.
Posted 5 years ago # -
josheeg
MemberWell I haven't considered making my design a shield but it is a interesting idea...
Right now I have a diagram of the connections between a maple & a ft2232h high speed usb chip by ftdi. Then the external ADC that I will power for now with VCC from the maple also connecting the grounds together.A shield with a high speed usb ft2232h and connections for 8 ads1298 ADC boards actualy 8 channel 16 input differential simultatious sampling 24 bit adc with programmable gain and right leg driver circuitry it is for biomedical devices. Fun stuff check out the open source design on my google page I will update sourceforge sometime.
https://sites.google.com/site/openloopproject/
the board design I have done so far is in kicad a free and open source circuit design suite like eagle but easier to use for any OS and no size limitations.
Posted 5 years ago #
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