Questions tagged [current-measurement]
Measurements of the current flowing through a circuit
1,598 questions
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Low-Side Current Sense Simulation
I have followed design guides online on how to create a low-side current sense circuit, for use with FOC to control a 3-phase BLDC.
There is a differential input low-pass filter, common-mode filter, ...
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High-accuracy DC current and voltage measurement on PCB
My application requires a high accuracy reading for DC voltage and current. DC voltage max is about 60 V and DC current max is about 140 A.
Currently I am using a 1 mΩ shunt(CSS2H-3920R-1L00F), for ...
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What hardware protection mechanisms prevent ADC damage from incorrect connections?
I built a circuit based on the uCurrent Gold meter to measure current within -500uA/500uA range, and I was wondering how can I add a protection to the ADC against: Overvoltage, Negative Voltage, and ...
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Can 2-wire measurement reach 4-wire precision?
I recently came across the TIDA-060029 documentation from Texas Instruments (auto-balancing impedance measurement), and I’m not fully sure whether the method used in that design is 2-wire or 4-wire.
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28 VDC 1.5A, 0.5A when fully charged, how can create a low current cutoff relay?
I have a 28VDC power supply charging 2 separate devices. Where the supply is turned on manually. Once activated, the 2 devices will start pulling 1.5A EACH. The current slowly drops until it is ...
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How do I build a generic inline current/energy meter with INA228 to profile other devices (µA sleep → 100–300 mA peaks)?
I want to build a small “inline power meter” that sits between a power source and any Device-Under-Test and reports current. I chose INA228 because it has high-resolution.
I need to measure a wide ...
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Dynamic Load (FET Slammer): breaking ground loop
I am designing a simple dynamic electronic load (FET slammer) for testing the step load response of voltage regulators. My target voltage range is 0.6-12V and 1-5A load current.
I will connect CH1 of ...
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Should PCB traces out of shunt resistor to processing IC be the same length?
I'm trying to measure current through a 265vAC wire using 1mA shunt resistor + BL0942 measurement IC.
Should traces out of shunt to the IC be the same length or due to low current through them it is ...
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Using REF200 to send signal over 2 wire power supply
https://www.ti.com/lit/ds/symlink/ref200.pdf?ts=1756607091265
Active electrode box uses this chip but only 2 wire.. meaning the signal is sent via the power supply. The theory is this. The active ...
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Oscilloscope probing
I am trying to measure the current through a diode in terms of voltage across a 100 Ohm resistor, as the voltage at the anode of the diode varies.
But when I connect the GND probe of the oscilloscope ...
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Current in a vibrating electrometer
I'm working out the relative "signal" of different electrometer designs following on from this question. I'm trying to determine the current magnitude (what would A read?). Consider the ...
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Could I use an op amp integrator to average the voltage across a current shunt to get the average current for a specific time period
I'm considering building a device to measure currents going down to the nano-amp range, mainly as it's something that cropped up a few times when I was working with battery powered devices and seems ...
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How do I figure out the outputs of a High Voltage generator (up to 11kV)
I am working on a electro adhesion project that requires me to use a HV generator that can output up to 11kV DC. But the details of the input/output voltages are unclear and I am not even sure it can ...
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Is a 4 cm CS trace to the LM25037 acceptable if routed on an internal layer under a solid GND plane?
I’m using a current transformer for current-mode control in a push-pull converter. The current sense resistor is placed next to the current transformer. However, the LM25037 controller is located a ...
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How to measure current of a single-phase induction motor to determine it's OK or not?
I would like to determine if an electric motor has a shorted winding as it was throwing fuse while running.
To exclude possible mechanical issues, as bearings and sealings, I stripped it of the ...
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