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Edit 1: clarified my question (I don't like to use the USB connector) ; Removed typos
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try-catch-finally
try-catch-finally
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I'd like to use an Arduino Uno R3 battery powered a datalogger. I want do supply it directly with a Step-Up regulated 5Vv5V rechargable battery powersource at power pin 5V.

I don't want to suppy it with 5V at the PowerJack or Vin because it's not necessary an would result in lower voltage when powered with 5V at Vin and unnecessary power dissipation at U1.

Let's take a look at the schematic: http://arduino.cc/en/uploads/Main/Arduino_Uno_Rev3-schematic.pdf

I've edited it, take a look at the green areas and blue paths (ignore the yellow area at first):
enter image description here

Just supplying it at that pin 5V however might destroy the linear regulator U1 that regulates >5V+ Vin down to 5V, I fear.

Question

Question

  • Is it acceptable and safe to suppy regulated 5V+ to pin 5V?
  • Should I additionally short it to Vin ()?

Unfortunately there's no internal schematic for U1 (NCP1117ST50T3G) in the datasheet.

For interest

For interest

Take a look at the yellow area: am I wrong or is the protection diode reversed? Shouldn't it have the catode at USBVcc?

Edit 1:

As three answers state that it would be the safest way supplying the Arduino with regulated 5V though USB, let I should clarify my question a bit: I'd like to fit the setup within a small case, so I want to avoid plugging in a USB cable if possible.

Except for testing purposes where this might happen by accident, it's not possible that Vin/VccUSB and Vcc 5V are available at the same time.

I'd like to use an Arduino Uno R3 battery powered a datalogger. I want do supply it directly with a Step-Up regulated 5Vv rechargable battery powersource at power pin 5V.

I don't want to suppy it with 5V at the PowerJack or Vin because it's not necessary an would result in lower voltage when powered with 5V at Vin and unnecessary power dissipation at U1.

Let's take a look at the schematic: http://arduino.cc/en/uploads/Main/Arduino_Uno_Rev3-schematic.pdf

I've edited it, take a look at the green areas and blue paths (ignore the yellow area at first):
enter image description here

Just supplying it at that pin 5V however might destroy the linear regulator U1 that regulates >5V+ Vin down to 5V, I fear.

Question

  • Is it acceptable and safe to suppy regulated 5V+ to pin 5V?
  • Should I additionally short it to Vin ()?

Unfortunately there's no internal schematic for U1 (NCP1117ST50T3G) in the datasheet.

For interest

Take a look at the yellow area: am I wrong or is the protection diode reversed? Shouldn't it have the catode at USBVcc?

I'd like to use an Arduino Uno R3 battery powered a datalogger. I want do supply it directly with a Step-Up regulated 5V rechargable battery powersource at power pin 5V.

I don't want to suppy it with 5V at the PowerJack or Vin because it's not necessary an would result in lower voltage when powered with 5V at Vin and unnecessary power dissipation at U1.

Let's take a look at the schematic: http://arduino.cc/en/uploads/Main/Arduino_Uno_Rev3-schematic.pdf

I've edited it, take a look at the green areas and blue paths (ignore the yellow area at first):
enter image description here

Just supplying it at that pin 5V however might destroy the linear regulator U1 that regulates >5V+ Vin down to 5V, I fear.

Question

  • Is it acceptable and safe to suppy regulated 5V+ to pin 5V?
  • Should I additionally short it to Vin?

Unfortunately there's no internal schematic for U1 (NCP1117ST50T3G) in the datasheet.

For interest

Take a look at the yellow area: am I wrong or is the protection diode reversed? Shouldn't it have the catode at USBVcc?

Edit 1:

As three answers state that it would be the safest way supplying the Arduino with regulated 5V though USB, let I should clarify my question a bit: I'd like to fit the setup within a small case, so I want to avoid plugging in a USB cable if possible.

Except for testing purposes where this might happen by accident, it's not possible that Vin/VccUSB and Vcc 5V are available at the same time.

Tweeted twitter.com/#!/StackElectronix/status/323343596914888704
deleted 55 characters in body
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Connor Wolf
Connor Wolf
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I'd like to use an Arduino Uno R3 battery powered a datalogger. I want do supply it directly with a Step-Up regulated 5Vv rechargable battery powersource at power pin 5V.

I don't want to suppy it with 5V at the PowerJack or Vin because it's not necessary an would result in lower voltage when powered with 5V at Vin and unnecessary power dissipation at U1.

Let's take a look at the schematic: http://arduino.cc/en/uploads/Main/Arduino_Uno_Rev3-schematic.pdf

I've edited it, take a look at the green areas and blue paths (ignore the yellow area at first): https://sharegallery.strato.com/pages/only-to-1st-post-at-se#electronics/photo/1962541 (Unfortunately first users are not allowed to post images with reputation < 10, I'll inline the image as soon as you give me enough upvotes=reputation :)
enter image description here

Just supplying it at that pin 5V however might destroy the linear regulator U1 that regulates >5V+ Vin down to 5V, I fear.

Question

  • Is it acceptable and safe to suppy regulated 5V+ to pin 5V?
  • Should I additionally short it to Vin ()?

Unfortunately there's no internal schematic for U1 (NCP1117ST50T3G) at AgeTeaTeaPea (unfortunately first usersin the ...)://pdf1.alldatasheet.net/datasheet-pdf/view/174874/ONSEMI/NCP1117ST50T3Gdatasheet.html

For interest

Take a look at the yellow area: am I wrong or is the protection diode reversed? Shouldn't it have the catode at USBVcc?

I'd like to use an Arduino Uno R3 battery powered a datalogger. I want do supply it directly with a Step-Up regulated 5Vv rechargable battery powersource at power pin 5V.

I don't want to suppy it with 5V at the PowerJack or Vin because it's not necessary an would result in lower voltage when powered with 5V at Vin and unnecessary power dissipation at U1.

Let's take a look at the schematic: http://arduino.cc/en/uploads/Main/Arduino_Uno_Rev3-schematic.pdf

I've edited it, take a look at the green areas and blue paths (ignore the yellow area at first): https://sharegallery.strato.com/pages/only-to-1st-post-at-se#electronics/photo/1962541 (Unfortunately first users are not allowed to post images with reputation < 10, I'll inline the image as soon as you give me enough upvotes=reputation :)

Just supplying it at that pin 5V however might destroy the linear regulator U1 that regulates >5V+ Vin down to 5V, I fear.

Question

  • Is it acceptable and safe to suppy regulated 5V+ to pin 5V?
  • Should I additionally short it to Vin ()?

Unfortunately there's no internal schematic for U1 (NCP1117ST50T3G) at AgeTeaTeaPea (unfortunately first users ...)://pdf1.alldatasheet.net/datasheet-pdf/view/174874/ONSEMI/NCP1117ST50T3G.html

For interest

Take a look at the yellow area: am I wrong or is the protection diode reversed? Shouldn't it have the catode at USBVcc?

I'd like to use an Arduino Uno R3 battery powered a datalogger. I want do supply it directly with a Step-Up regulated 5Vv rechargable battery powersource at power pin 5V.

I don't want to suppy it with 5V at the PowerJack or Vin because it's not necessary an would result in lower voltage when powered with 5V at Vin and unnecessary power dissipation at U1.

Let's take a look at the schematic: http://arduino.cc/en/uploads/Main/Arduino_Uno_Rev3-schematic.pdf

I've edited it, take a look at the green areas and blue paths (ignore the yellow area at first):
enter image description here

Just supplying it at that pin 5V however might destroy the linear regulator U1 that regulates >5V+ Vin down to 5V, I fear.

Question

  • Is it acceptable and safe to suppy regulated 5V+ to pin 5V?
  • Should I additionally short it to Vin ()?

Unfortunately there's no internal schematic for U1 (NCP1117ST50T3G) in the datasheet.

For interest

Take a look at the yellow area: am I wrong or is the protection diode reversed? Shouldn't it have the catode at USBVcc?

Source Link
try-catch-finally
try-catch-finally
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Arduino Uno R3: Directly supply regulated 5V to 5V pin?

I'd like to use an Arduino Uno R3 battery powered a datalogger. I want do supply it directly with a Step-Up regulated 5Vv rechargable battery powersource at power pin 5V.

I don't want to suppy it with 5V at the PowerJack or Vin because it's not necessary an would result in lower voltage when powered with 5V at Vin and unnecessary power dissipation at U1.

Let's take a look at the schematic: http://arduino.cc/en/uploads/Main/Arduino_Uno_Rev3-schematic.pdf

I've edited it, take a look at the green areas and blue paths (ignore the yellow area at first): https://sharegallery.strato.com/pages/only-to-1st-post-at-se#electronics/photo/1962541 (Unfortunately first users are not allowed to post images with reputation < 10, I'll inline the image as soon as you give me enough upvotes=reputation :)

Just supplying it at that pin 5V however might destroy the linear regulator U1 that regulates >5V+ Vin down to 5V, I fear.

Question

  • Is it acceptable and safe to suppy regulated 5V+ to pin 5V?
  • Should I additionally short it to Vin ()?

Unfortunately there's no internal schematic for U1 (NCP1117ST50T3G) at AgeTeaTeaPea (unfortunately first users ...)://pdf1.alldatasheet.net/datasheet-pdf/view/174874/ONSEMI/NCP1117ST50T3G.html

For interest

Take a look at the yellow area: am I wrong or is the protection diode reversed? Shouldn't it have the catode at USBVcc?