What I want1) 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
1) Go on, get the data sheets and calculate yourself.2) Depending on the actual current a battery may work from a few minutes to a few hours. 9V batteries are not a good Arduino power supply.
I want to calculate the power consumption of my system (Not with multimeter, but from datasheet)
1) With an alkaline 9V battery (For example this) and having measured the total required current, how can i calculate how long will it last? If I understand well, i can check it from the 1st & 2nd diagram on page 2 of the above datasheet. Am I right?
2) How do I measure the current for LCD 16X2? Should I measure the the current for all the pins that are connected with 5V? And then sum the currents?
3) What is the current for a 3.3V pin, 5V pin and an analog pin? (I have read different values for every case.)