Pro Mini 5v 16 MHz

Using Arduino Microcontrollers
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Hi I hope this is the correct forum. I am working with the Pro mini but the pinout is not clear to me. I have the attached schematic but not sure which pin is digital pin 11.
perhaps there is a better pin out sheet?
Thanks
Gene

Arduino Pro Mini Schematic.pdf (59.1 KB)

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SCK is D13
MISO is D12
MOSI is D11

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I believe you can find some nice diagrams here as well of the ProMini and other cards.
http://www.pighixxx.com/
(clones might vary as to placement of A4-5-6-7)

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A0 to A5 are also D14 to D19
A6 & A7 are analog inputs only (if broken out)

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I'm ordering some Pro mini boards (chinese clone, but not sure 3.3V or 5V version) and intend to build a portable app with it using a 3.7v li-ion battery. In the datasheet mentioned that Operating Voltage (Vcc): 1.8 to 5.5 V. Can the 5V board run well with the 3.7v Li-ion battery?

Thanks for any advices.

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A 16Mhz Pro Mini needs 5 volt power to the controller.

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LarryD:
A 16Mhz Pro Mini needs 5 volt power to the controller.

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Affirmative. But if the project is in a temperature stable environment, then one can often "get away" with running the 16MHz from 3.3 Volts. No guarantee but I have a drawer full of the 16MHz units and they all run at 3.3 Volts ... the only one from the 30 lot that would not would also not run at 5 Volts !!! :grin: The hot-air reflow fixed that.

Ray

8

I too have used 16Mhz Pro Minis at lower voltages, they worked fine.

However, when I did this in control relays in my 747, it's flight plans were not always reliable. :wink:

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LarryD:
<...>
However, when I did this in control relays in my 747, it's flight plans were not always reliable. ;

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That's it, that's it ! !

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