How much power does the Arduino Pro Mini use?
Without a lot of work, it’s easy to save power with the Arduino Pro Mini. In “Power down” state, running at 8Mhz seems to consume as much power as at 1Mhz. However, in “Active” state, running at 1Mhz saves a lot of power (3.5mA to 1mA at 3.3V, and around 500µA at 1.8V)
Is it possible to run Arduino pro at 1MHz?
However, in ” Active ” state, running at 1Mhz saves a lot of power (3.5mA to 1mA at 3.3V, and around 500µA at 1.8V) It is not possible to run at 1.8V and 8MHz. To be able to use the battery as most as possible, it is mandatory to run at 1MHz [1:1] The consumption of the two modules is quite the same (and my multimeter is quite cheap).
How is the reset button on the Arduino Pro Mini?
Rather then requiring a physical press of the reset button before an upload, the Arduino Pro Mini is designed in a way that allows it to be reset by software running on a connected computer. One of the pins on the six-pin header is connected to the reset line of the ATmega328 via a 100 nF capacitor.
Can you use Arduino Pro Mini with ATmega328?
The ATmega328 also supports I2C (TWI) and SPI communication. The Arduino software includes a Wire library to simplify use of the I2C bus; see the reference for details. To use the SPI communication, please see the ATmega328 datasheet. The Arduino Pro Mini can be programmed with the Arduino software download.
How to measure the power consumption of an Arduino circuit?
If all you have is an Arduino Nano and some resistors (from your comment), then the only way to get any worthwhile result is to program the ADC to use the Internal 1.1V reference. This at least will give you a better range on the ADC. Refer to the Nano schematic and the ATMega328p datasheet, section 28.
Why do you need amplification on an Arduino?
The typical Current sensor is only 50mV drop at peak current, so amplification is needed to improve the accuracy of the measurement to use the dynamic range of the ADC. Then a mux can share this amplifier and input pin but require a serial or parallel 2 bit address.