Tagged Questions

3
votes
2answers
168 views

Measuring an Arduino's power source voltage using Analog In

I am powering an Arduino using a 5v battery, and I need to measure the voltage. Let's say the battery delivers high current, is it safe to measure the voltage via Analog In? As in this: The reason ...
4
votes
1answer
169 views

battery voltage with microcontroller [duplicate]

Possible Duplicate: Arduino has an input value in disconnected pin I wish to measure the voltage of a 1.5V battery using a microcontroller (supply voltage of 3V). I thought of connecting ...
2
votes
1answer
398 views

PIC analog to digital converter to measure more than one battery voltage (with different grounds)

I'm trying to build a circuit that can scale down several lipo batteries (5 cell) up to 22V max to be safe to either 3.3V or 5V for measuring with a PIC microcontroller using the analog to digital ...
4
votes
1answer
556 views

How to measure battery voltage

I am building a battery powered device. Almost all of my logic is running at 3.3v, although I do have a 5v supply for a few hobby servos. I want to measure the battery voltage, but I can't do so ...
1
vote
2answers
392 views

AA Battery Level

I am building a system with 4x AA batteries. (3V output) I like to understand the battery level for the system. I cannot control which battery people use (li-ion vs alkaline) or quality of the ...