Questions tagged [voltage-divider]
A voltage divider is a circuit that produces an output voltage that is proportional to the input voltage. One typical configuration consists of a pair of resistors in series from the input voltage to ground, with the output voltage taken from the junction of the resistors. As an example: two equal-valued resistors will give an output voltage that is 50% of the input voltage.
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Designing battery voltage measurement with passive balancing
At work I have been busy designing a circuit for measuring the voltages of three batteries that are connected in series to each other. A microcontroller will read the voltages and determine which is ...
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Not correct reading in ADCs DACs integrated system
I made a ADCs board (AD7194) and DACs board (AD5689). Each DAC (separated ground) could output 0-5V, and Each ADC channel could measure 0-3.3V. I used a voltage divider network to turn 0-5V to 0-3.3V. ...
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LM5013 buck regulator won't have high duty cycles
I have made a PCB with the LM5013 buck regulator, but can't seem to get the output voltage high enough. The goal is to be able to adjust the output voltage using the LOAD_REGULATE pin, for a variable ...
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What is the proper way to make a configurable split-supply voltage clamp with voltage dividers?
Being a beginner in electronics and not having had exposure to a lot of “best practices” I was trying to generalize the voltage clamp to arbitrary positive and negative clamping voltages. The ...
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Switching voltage divider and low pass filter combined
I have an input signal which I want to switch from 12V-5V and a low pass filter directly after that, the issue is, if there wasn't a switch I can calculate the cut-off frequency easily.
In my case, ...
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Calculating current through a diode in a voltage divider circuit
I have a voltage divider circuit which I use to drive two LEDs with different luminous intensity. I understand that this is not the best way to do it but I wanted to control two LEDs with the same ...
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Trimmer Potentiometer with Unexpected Voltage Range
I designed a voltage divider circuit using a trimmer potentiometer 3224J-1-103E for the first time. But, upon receiving the board, I found out that I was unable to tune the potentiometer across its ...
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How to analyze and simplify a voltage divider with a second voltage source?
How do I simplify the circuit below?
simulate this circuit – Schematic created using CircuitLab
I know that R2 and R3 form a voltage divider, but I can't figure out the input impedance that In ...
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Unknown use 20 V injection in KNX Digital input (read switch status) gvs 4fold
This is a circuit that I've recreated from gvs 4fold digital input.
There is common and wire that goes to 4 switches (this circuit only shows 1 of them) when it it's closed the microcontroller reads ...
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How to measure multiple resistances with Arduino Uno, without one measurement influencing the other?
I'm working on a project where I aim to measure resistances using an Arduino Uno. I started with two separate voltage dividers, each using a 1 MOhm reference resistor, connected to a common Arduino ...
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Understanding Voltage Read in Voltage Divider for NXP S32K118 Microcontroller ADC
I am having a bit of a hard time understanding the voltage read in the voltage divider that is being an input for an ADC to an NXP microcontroller, S32K118. Below is the schematic of the circuit.
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More current draw from a power supply based on a voltage divider
I've built a circuit that needs a power supply that can provide -12V, 5V and 12V. I've built the circuit below as a proof of concept, being aware that I might need to build something that allows for ...
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Beginner question regarding voltage divider for microcontroller
I am a beginner concerning electronics and would love to learn something new. I have a Teensy 4.1 and would like to calculate an encoder's speed. The encoder is built in into a system which supplies ...
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How to connect 3V dc motor to 5V power source? [closed]
I can't get a grasp of electro-engineering basics
Given a DC motor 3V and 5.12V power supply from a phone charger
I thought I can use voltage divider to divide 5.12V into 3V and 2.12V, seems logical
<...
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Unusual but consistent variation in alternate sensor analog readings
I have designed some sensors that take readings of timber resistance between 2 screws with the idea to determine if the timber is getting wet from a leak. I have had a trial setup running with 6 ...
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