Hello to everyone.
[u]I am using:[/u]
1) Arduino Mega 2560 2) 3 LEDs for typical use, 3 Resistors (330 Ω) 3) Buzzer (https://components101.com/sites/default/files/component_datasheet/Buzzer%20Datasheet.pdf) 4) NEO-6M (https://www.u-blox.com/sites/default/files/products/documents/NEO-6_DataSheet_(GPS.G6-HW-09005).pdf) 5) Relay (https://www.circuitbasics.com/wp-content/uploads/2015/11/SRD-05VDC-SL-C-Datasheet.pdf) 6) MQ3 (https://www.sparkfun.com/datasheets/Sensors/MQ-3.pdf) 7) Fingerprint reader (https://cdn-learn.adafruit.com/downloads/pdf/adafruit-optical-fingerprint-sensor.pdf) 8 ) LCD 16X2 (https://components101.com/sites/default/files/component_datasheet/16x2%20LCD%20Datasheet.pdf) 9) SIM900 (https://simcom.ee/documents/SIM900/SIM900_Hardware%20Design_V2.05.pdf)
1) Arduino Mega 2560 is connected with USB on laptop. 2) SIM900 is powered by a power supply 12V/2A. 3) NEO-6M is powered by 3.3V pin of Arduino Mega 2560. 4) LEDs are connected to Analog pins of Arduino Mega 2560. 5) All the rest components are powered by the same 5V pin of Arduino Mega 2560. Powering all the components with the above way, the system works as I want.
[u]What I want[/u] 1) I want to calculate the power consumption of my system (Not with multimeter, but from datasheet). 2) If I power Arduino with a 9V battery (For instance this battery: Panasonic pro power 9V - https://media.digikey.com/pdf/Data%20Sheets/Panasonic%20Batteries%20PDFS/6LR61XWA.pdf) and the SIM900 with another 9V battery, will the system work? And how long will the system lasts?