The regulators I used are from Spark Fun electronics (3.3v and 5v) and are based on the ON Semiconductor’s NCP1402. Jul 11, 2013 #7 V. vinodstanur Advanced Member level 3. when in sleep mode a microcontroller still consumes power. The ATmega328P is an 8-bit AVR microcontroller chip developed by Atmel (which was acquired by Microchip Technology in 2016). A power consumption of  20.9mW. The low fuse value will be, according to this, 0xE2 ; the command to be used is the following one : You can verify the result with this command : Now, i will connect a LED to the pin #15 corresponding to GPIO 9 usable as a PWM to test it with the Fade example. ATMEGA328P is an 8-bit microcontroller based on AVR RISC architecture. You can read more in my article about reducing power consumption. For product comparison, please consider: ATmega328PB. They include sleep modes, use of power-reduction registers, and other techniques. Have you allowed a project to run since you wrote this? System Control and Reset Resetting the … In this experiment I investigate the power consumption of the Atmel ATmega328P-PU microcontroller which is the uC used in the Arduino Uno R3 boards (and others). -caveat: I removed the 16Mhz oscillator to upload the 8Mhz bootloader but kept getting error. The main reason for this study is to help a project designer select the right system parameters to achieve desired battery life. Post was not sent - check your email addresses! I didn't use a Uno because the power used by the "power on" LED and the voltage regulator tend to swamp the power consumption of the chip itself. Now measuring the microcontroller current draw we see only 6.39mA at 3.37V. Here’s the schematic of the voltage regulator (schematic from here). Upload using an Arduino Board – code used is Examples –> Blink. ATmega328P Microcontroller The Atmel® ATmega328P is a low-power CMOS 8-bit microcontroller based on the AVR® enhanced RISC architecture. Referring to the data sheet containing information on the Atmega328p (http://www.atmel.com/images/Atmel-8271-8-bit-AVR-Microcontroller-ATmega48A-48PA-88A-88PA-168A-168PA-328-328P_datasheet_Complete.pdf), it states that the power consumption of a 1Mhz, 1.8V, 25C operating mode consumes 0.2 mAs of current. As stated in the intro, the main reason for these experiments is better estimate battery life, so now let’s add the battery to the tests. If you do use sleep mode, you'll also need to wake up the mcu to … For one of my projects, I want to have a really low power consumption device to be able to use a battery for many month. Another ATmega328P pin is used to detect TX from the chip, so the ATmega328P can turn off the serial whenever. With those two power figures we can calculate the regulator efficiency: Efficiency = Power_out / Power_in  =  20.9mW / 27.5mW  = 75.9%. 2.7V to 5.5V for ATmega328P Temperature range: Automotive temperature range: –40°C to +125°C Speed grade: 0 to 8MHz at 2.7 to 5.5V (automotive temperature range: –40°C to +125°C) 0 to 16MHz at 4.5 to 5.5V (automotive temperature range: –40°C to +125°C) Low power consumption Active mode: 1.5mA at 3V - 4MHz You must take into consideration that wakeup time is about 65ms. By executing powerful instructions in a single clock cycle, the ATmega328PB achieves throughputs close to 1MIPS per MHz. I use one AAA battery and since its nominal voltage is 1.5v we need a step-up regulator or Boost regulator to get 3.3v and 5v. It can commonly be found as a processor in Arduino boards such as Arduino Fio and Arduino Uno. Note that when taking the current and voltage measurements I disconnected the LED. The chip contains 32 kilobytes of internal flash memory, 1 kilobytes of EEPROM and 2 kilobytes of SRAM. If you’re looking for the power consumption of the Arduino board instead, please refer to this article. An Arduino Uno runs less than one day on a 9 V battery because it uses about 45 mA current. The atmega328p has a special fuse setting for using a 32768Hz crystal. Joined Oct 31, 2009 Messages 750 Helped 114 Reputation 234 Reaction score 114 Trophy points 1,333 Location Kerala (INDIA) Activity … Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is interesting to notice that if you have a 5V supply you will be at 20mA for the same thing. Another solution is to use another arduino as an ISP (see this article). Based on this code, what I get from my current meter is a consumption 0.29mA at 5V and 0.19mA at 3.3V You must take into consideration that wakeup time is about 65ms. In my case, as i’m using the ISP programmer, and it seams it is now not really well detected on Mac OsX maverick I have to use the command line for the programming : The path is subject to differ on you system. Power calculated from measured voltage and current. You can see in the graph above the default Arduino Uno configuration of 5v and 16Mhz consumes 81mW for the blink LED code (LED disconnected), and if we drop that voltage and frequency to 3.3v / 8Mhz there is a 6 fold power consumption reduction! The ATmega328P, used on popular boards like the SparkFun RedBoard, Arduino Uno, and Pro Mini are actually quite power hungry. To be adapted to the device we are building, choose Arduino pro or mini as card and AtMega328, 3v3 8Mhz as processor. This website uses cookies to improve your experience while you navigate through the website. We also use third-party cookies that help us analyze and understand how you use this website. ATmega328P Typical Characteristics 34.1.1. The Arduino on breadboard is basically a bare bones arduino, featuring only the micro-controller as the major component, without all the other parts that makes up the Arduino, like the USB port, the on-board serial to usb converter, voltage regulators, etc, most of which are sometimes not needed in a project after programming has been done. Similarly the 5v regulator has a 72.7% efficiency. This is a power consumption of 27.5mW out of the battery (Power = Voltage x Current = 1.53 x 18mA = 27.5mW ). You also have the option to opt-out of these cookies. This schema use a 16Mhz Quartz but it will be removed once the system setup. Only THEN I was able to burn the 8Mhz Bootloader. Power-save Supply Current 34.1.6. I kept getting errors compiling then uploading code. With no LED connected. In this thread I show various power-saving techniques for the Atmega328P processor. Best regards. You can find articles that bring the power consumption of the ATmega328P down to 100 nano ampere as Power saving techniques for microprocessors. Reply ↓ Phil July 29, 2017 at 06:59. The ATMEGA328P-PU is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. Supply Current of IO Modules 34.1.3.1. There are 3 of them : low fuse, high fuse and extended fuse. Having said that, I set up a couple of tests and measured the power consumption. for Arduino Nano; for Arduino Uno It is the most popular of all AVR controllers as it is used in ARDUINO boards. I’ll try to simplify it a little bit and document it a little more …. 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