Linked Questions

0
votes
1answer
242 views

Measure voltage using transistor with strange behaviour [duplicate]

I'm facing a problem that is completely strange for me. This is simple, I build a small electronics device and in that one I just set up a voltage bridge divider to obtain battery voltage to be able ...
4
votes
2answers
211 views

How do I implement a simple and efficient voltage divider for battery level readings for a ESP32 board?

I'm trying to design a simple device based on ESP32 board, which will control stepper motors from a battery pack (26650 series). I'm struggling with the battery level control part (red/blue colour ...
1
vote
1answer
1k views

Low power battery voltage monitor

I would like to measure the battery usage of my ESP32 device. As my device runs in deep sleep mode 99% of the time, it's important that the battery monitoring circuit does not add too much to the ...
2
votes
1answer
543 views

Low Current Battery Monitor Detail Question

I'm trying to design a circuit that will be running from a battery. I'm currently working on the part that detects the voltage and came across this question (and answers) here: It made pretty good ...
-1
votes
2answers
1k views

How to find battery voltage with simple voltage divider circuit connected to ADC of microcontroller? [duplicate]

The problem with circuit is that it may give same ADC value even when the voltage of battery drops.....so please give me suggestions on that...thanks in advance.
1
vote
3answers
323 views

Maximum forward current on ESD diodes

I'm interfacing a dsPIC33EP512MC806 with a set of analog systems. The analog systems manage a battery and have vregs for the digital systems. The analog systems measure the voltage and current ...
0
votes
2answers
447 views

Selecting low power mosfet for battery monitor

I'm trying to implement og test the results discussed in the linked JeeLab post in a low power battery powered device. http://jeelabs.org/2013/05/18/zero-power-measurement-part-2/#comments The post ...
1
vote
4answers
238 views

Picking correct level of resistance for a voltage divider

I want to measure my DC voltage source (aka batteries), vs my known Dc voltage from my DC-DC regulator. To do this I'll need a voltage divider. I can calculate the resistances I need - but what I'm ...
1
vote
1answer
230 views

NI-MH battery monitor design. Any obvious errors?

Let me preface this by saying I'm not that much of an EE expert, this is a "hobby" project, I consider myself as knowing enough to be dangerous. ;) I'd never apply for a full time career as an EE ...
0
votes
0answers
84 views

Debugging implementation of low current battery monitor

I have tried to implement the circuit in this answer in order to measure the voltage of an external battery using an Arduino. However, I am not sure if I have wired it correctly. Here is the diagram: ...