2014年10月30日 · According to the Arduino documentation, the Uno uses a 5-volt linear voltage regulator in a TO223 SMD package. Apparently, compatible voltage regulators are available on eBay for less a dollar for a 10 pack!

The voltage line from the barrel jack connector is regulated in Arduino boards using their onboard voltage regulator; usually, it is first regulated to 5V and then regulated again to 3V3 in most Arduino boards.

2023年12月27日 · Key Takeaways from the Arduino Voltage Regulator Guide. Let me summarize the key points about voltage regulation and the Uno for quick recall: The Arduino Uno contains two regulators – AMS1117 (5V) and LP2985 (3.3V) They convert noisy higher input DC to steady logic level outputs ; Allows wide 6V-12V DC input range flexibility

2016年12月1日 · The voltage regulator is an AMS1117 5.0V SMD device. The spec sheet shows it can be powerd with up to 18V. I never applied more then 15V, and the load current of the Arduino has never been more then about 200mA.

2016年1月8日 · You will almost certainly need a separate voltage regulator if you want lots of current at 5V. If the main load can work at 9V then run it from 9V, it will simplify things.

In part 2 of Building an Arduino UNO From Scratch, we look into the Arduino voltage regulator subsystem of the Uno in great detail.

2017年2月22日 · The Uno has an input voltage limit of 6-20V. Although it is recommended to stay 7-12V so that the 5V regulator on the Uno will run most efficiently.

Arduino-based Switching Voltage Regulators: DC to DC converters are used to efficiently convert DC voltages. They have a conversion efficiency of up to 95% making them useful for LED strips, bike lights, battery chargers and solar powered devices. …

2016年8月11日 · But on the Arduino Uno, we have a low drop-out voltage regulator. It dissipates less power in the form of heat. Thus allowing us to have an output that is very close to the input. Basically, you can get a 5V output even if the input is as low as 6V.

The LM1117 is a popular linear voltage regulator that can provide steady voltage to your Arduino and ATMega projects. This unit comes in fixed output voltages of 1.8, 2.5, 3.3, and 5 volts or can be bought as an adjustable unit, able to output 1.25 to 13.8 volts.