Questions tagged [voltage-measurement]
Act of measuring voltage
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How can i make this idea work in PCB?
Assume i have a source of energy (voltage source), i want to sense the voltage and current of this source and transfer this analog information to an ADC (arduino nano)
thus i have to make the voltage/...
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How to Read Unipolar Square Waves on TRMS Multimeter
I'm trying to switch from reading my high-voltage unipolar square wave signal from a benchtop oscilloscope to a handheld multimeter, but I don't understand why my multimeter is giving the voltages it'...
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How do I create a circuit to reliably calculate a range of unknown resistances?
I'm designing a low power circuit which serves to determine the unknown resistance across a 16 channel sensor. So far the results are bit subpar. The resistances are a function of a different applied ...
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Ground connection of power converter and MCU
I've designed an AC/DC power converter PCB, with input, and output voltage sensing, but I have problem connecting it to microcontroller board, i'm using F28379D launchpad as the microcontroller.
I ...
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How to measure battery voltage during charging?
I have a slight confusion regarding the battery. Suppose I have to charge a battery of initially 12V to 14.2V (full charge). My charger has open circuit voltage of 15V. When I connect it what voltage ...
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Voltage Divider + Unity Buffer as a power supply
I'm working on an application where I need to step down a 3.7V LiPo down to a 1.0-1.5V for an embedded device that takes AAs (effectively an AA-to-LiPo conversion kit). In order for "low battery&...
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Constructing the voltage as a function of time for a circuit with a capacitor and resistor under a current source
I have a circuit as shown in the image.
I want to derive the formula for the voltage V(t) as a function of time; when a constant current source is applied.
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Brown outs with Nordic Instruments PPK2 power profiler
I have a circuit that I know works with 2 AA batteries that are nearly dead (1.4 volts total).
I want to measure the current consumption of the circuit using my Nordic Instruments PPK2 meter. The only ...
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Why is my oscilloscope math mode showing an RMS voltage in gigavolts (unexpectedly high value)
I'm experiencing an issue with my Rigol DS1202 oscilloscope. When using the math function to measure the RMS voltage of the difference between two channels (A - B), the RMS value is displayed in ...
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How to offset a sinusoidal voltage centered at 0 V for power grid measurements
I am trying to take voltage and current measurements from the power grid (120V 60Hz) and process them with a 3.3V based digital signal processing board (TI F280049C launchpad)
I am using LV25-P and ...
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Detecting and measuring AC line voltage with an optocoupler
I simulated the circuit shown below using MultiSim and obtained some interesting results.
The simulation suggests that you can accurately reproduce the AC line voltage from the input to the output. ...
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Is it safe to use a battery charger with an output voltage higher than the battery voltage? [closed]
I apologise in advance for any erroneous or obvious points or terms I may use.
I have a Remington beard grooming razor, which originally contained a 1.2V 700mAh NiMH rechargeable AAA battery, which ...
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What does an accuracy of 0.1% + 20 mV mean in a power analyzer's data sheet?
I need to know the measurement accuracy of Keysight N6705C power analyzer. I came across this document (N6700 Modular Power System Family.pdf) that states the error in terms of a percentage plus a ...
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Confusion around 3-wire/4-wire three phase voltage sensing
I'm trying to understand the voltage sensing setup when measuring three phase voltages in a 3 wire system (like Delta with no neutral) or a 4 wire system (like WYE) or Delta High leg (delta with ...
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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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