Questions tagged [voltage-divider]
The voltage-divider tag has no usage guidance.
8
questions
1
vote
1answer
59 views
Measuring 12 V via voltage divider: choosing the right resistors
I want to measure a 9 V battery via one of the analog input ports of my Arduino Nano. From all the schemes of this great answer, I choose the simplest one, the voltage divider. Assuming the maximum ...
1
vote
1answer
53 views
How to read voltage using ADS1115
I'm very new to this. I found this tutorial.
But it don't explain how to read voltages higher than Arduino 5V. I have connected a 100K ohm resistor to positive and 10K ohm to negative of my 24V power ...
0
votes
2answers
76 views
Arduino 10bit ADC is not accurate?
I'm reading the voltage with voltage divider:
simulate this circuit – Schematic created using CircuitLab
| Arduino is connected to both USB and a 9V adapter.
float r1 = 100000;
float r2 = ...
0
votes
2answers
51 views
Buzzer interfere with thermistor reading
This is how i wired the thermistor and buzzer:
simulate this circuit – Schematic created using CircuitLab
And the code:
#define RT0 10000
#define B 3977
#define R 10000
float RT, VR, ln, TX, ...
7
votes
2answers
102 views
How to read high voltage (40-65v) from a Solar Battery bank
I would like to monitor the battery voltage of a 48v solar battery system. The expected voltage range is 40-65v.
I have tried creating a voltage divider with 2 resistors but with all values I have ...
0
votes
2answers
162 views
Value read is not changing while rotating pot in arduino?
I am trying to read voltage using analogRead in Arduino Uno from a voltage divider circuit consisting of 1k resistor and 10k pot. The Pot used is bourns 3296. The values obtained only range from 1011 ...
0
votes
0answers
47 views
Making a voltmeter for PV system over 60 VDC
I'm trying to make a voltmeter for my PV system that can range from 24 VC to 120 VDC.
I'm aware of the fact that we have Arduino modules available that can work for 25 VDC system. However in my case ...
0
votes
2answers
107 views
Would a 100KΩ resistor connected to ground pull an open analog line down to 0
I have a project that has a photoresistor wired into a voltage divider and connected through a 3.5mm “stereo mini plug”. When nothing is in the mini plug, the analog line is an open circuit, and ...
