Power Shield (Arduino Compatible)

Q: The instruction is very messy and I have just burnt one of my circuit board accidentally. Could you please revise your Wiki document as soon as possible? I felt very disappointed that there is no over current protection at all.I just need two cases:1. How to power a 5V 3rd party device through PWROUT with a 12V PWRIN? What jumper setting I need?2. How to power a 5V Arduino Yun with a 12V PWRIN. What jumper setting I need?What are the most safety way (a step by step instruction assumed I have multimeter) to switch from case 1 to case 2 to avoid over current?.

Bought these so I could power the Arduino and a cellular shield from a battery bank (~30V) but this doesn't appear to power the arduino up. Am I missing something or is the product description of "Arduino now have one power supply for all." misleading???

1. Example Code

This project uses an I2C LCD module to display the output voltage of the Power Shield. The Power Shield's built-in voltage measuring function maps the output voltage to Arduino analog pin 0, and the sample code reads this analog value, converts it to a voltage, and displays it on the LCD. Users can learn how to interface the Power Shield with Arduino, read analog signals, and use an I2C LCD for data display.

Reference

This article explains the use of Wire and LiquidCrystal_I2C libraries with Arduino, providing installation and usage guidance. It also explores two methods for operating power shields, including voltage regulation and device control, alongside benefits of stackable design.

Parameter	Value
Supply voltage	4.5-35V
Output voltage	1.25-12V
Output current	2A (3A peak)
Efficiency	90%

Power Shield (Arduino Compatible)

Specification

Pinout