Questions tagged [current-sensing]
The current-sensing tag has no usage guidance.
174
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Why do I have a sudden current peak when PWMing a valve?
I am driving a proportional solenoid valve with PWM from an MCU as follows:
The voltage of the MCU is 3.3 V. The gain of the amplifier is set to 20 V/V. Because the valve consumes 170 mA when fully ...
- 519
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Current sense pin detect too quickly (Flyback)
Here is my circuit:
simulate this circuit – Schematic created using CircuitLab
There is two problems:
Firstly, the sense circuit don't open the mosfet at 1V, yet the zener at the V+ in the amp ...
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Current Sense Amplifier / Differential Amplifier Negative Voltage On GND pin OK?
Right now I'm picking a current sense amplifier for my application, and I'm looking for for amplifiers with maximum offset voltage of below 50uV (and offset and bias currents in nA/pA range).
Luckily, ...
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Isolated Current Shunt Amplifier
I have twenty isolated power supplies (around 40 V max) which need to have their current draw sensed and monitored. I'm currently using a TI INA138 current sense amplifier, which sort of works.
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MAX9919 Thermal Pad
I am designing the thermal outline plane of this current amplifier ic in a 4 layer board using Eagle Pro. This board will be made using ENIG process.
After spent so much time trying to understand in ...
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715
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Measuring PWM controlled current with a microcontroller
I want to measure current using sensor MLX91220 which gives output in analog.
I have battery that I charge and discharge via switching MOSFET and want to measure current on this grid.
Problem is that ...
- 525
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649
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Sensing voltage drop across the load in the H bridge
I use two BTN7970 to make a full bridge circuit. The load is a piece of shape memory alloy(SMA) wire.
I want to accurately measure the net voltage drop on the load excluding caused by mosfet's RDS. ...
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Why should the fullwave current sensor bandwith be about 10 times switching frequency?
This is an example of high side switch current sensor in a buck-boost converter.
I read that for high-side switch full waveform sensing the current sensor bandwith should be about 10 times switching ...
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140
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Bipolar high-dynamic range current sensing
I'm working on a project that will necessitate bipolar current measurement across a wide current range. It will need to accurately measure current from 750 mA down to 1 nA, although greater. The ...
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Power outage detection to kickstart a safe shutdown and data retention process
I plan a system that operates on a 5v rail.
The power is supplied from an outside DC source.
The 5 V powers an RPI CM4 and other components that are controlled by it.
The whole system requires up to 5 ...
- 173
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How do you analyze this simple circuit? [closed]
I want to plot Vout vs time graph (which software do you suggest) and also want to find out max and min output voltage (Vout) of the circuit. How can I find the max and min manually?
Can I find them ...
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134
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non-inverting current sense op amp output unstable during the measurement
I would like some advice on how to solve the following problem. The following circuit is motor driver with current sense circuit. The circuit run motor at cca 30mV when is not under load, but when the ...
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589
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Current sensing relay that momentarily closes contact each time state changes
I have a 240V dust collector that I manually switch on and off using a one-button wireless remote. The dust collector is connected to several machines.
I'd like to use a current sensing relay to ...
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How to measure very low current by amplifying it?
I am trying to measure current from a DC circuit. So it basically I am trying to make an ammeter. I am using ACS712 20A current sensor and Arduino UNO. Theoretically, I can measure a minimum of 50 mA ...
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Can a floating capacitor terminal be used to collect electrons?
I want to collect charge from an electron beam source. For that, I'm proposing to put a floating capacitor with its bottom terminal floating and directly exposed to the electron beam gun. The top ...
