The Hall effect is the production of a voltage difference across an electrical conductor by a magnetic field.

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Hall Effect Sensor - output error from heating

What would be a best way to have DC to DC conversion from OBD2 12\24v to 5v for PIC where is also Hall Effect sensor? For example, if I use Mini DC/DC Step-Down converter and ACS712 sensor, they says ...
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57 views

Regarding effects of improper wiring in PC

Have found a situation with a consumer (enthusiast-level) motherboard with a 12v DC fan hand-spliced to a 3/4-pin fan header. (The header can operate as 3-pin with voltage modulation, or as a 4-pin ...
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37 views

Hall effect output voltage

I have an omnipolar (2ssm) hall effect sensor which outputs 400mV when triggered by a magnetic field. Basically what I want to know is, is there a way to increase this output voltage to be able to ...
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62 views

Adding Low Pass Filter to Open Collector Hall Sensor

I'm using a gear tooth sensor to create pulses when a metal object passes the sensor. There's a lot of noise on the signal so I decided a simple low pass filter would suffice(f-cutoff = appx.400hz). ...
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5answers
125 views

How to design a AC current detection switch?

I am working on a home automation system and I need to detect if a appliance is getting power or not. Basically, I need a AC current detection switch which can be mounted on a power line and sends a ...
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162 views

Magnetic Levitation Using Linear Hall Effect Sensors

I am doing a project of magnetic levitation like this. I have two linear hall sensors which will give me the position of levitating magnet. I have set a specific position of magnetic object by ...
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1answer
57 views

Stabilising a constant current load opamp feedback loop

I designed a constant current load around the ACS712 Hall-effect current sensor (module from eBay). This module gives a voltage output of 185mV/A superimposed on VCC/2. Its current range is +-5A altho ...
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226 views

Is it possible to “trace” a hall effect sensor on a PCB?

To my knowledge, a hall effect sensor is just a soft-cored hooped metal (iron?) with some wire wrapped around it a precise number of turns. This surrounds another wire that you wish to measure the ...
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47 views

Cancel latching hall effect sensor effect

I want to use a hall effect sensor to detect when a door is close or not; the sensor would be in the door frame, and a little permanent magnet would be on the door. However, I learned that the sensor ...
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2answers
85 views

AC coil sensing circuit with A1120EUA-T Hall effect sensor

I've seen many questions on here asking about hall effect sensors, and their capabilities, and although many seem to say that they can sense an AC magnetic field, I seem to be having a problem. What ...
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1answer
102 views

How to replace a switch with a NJK-5002c hall sensor?

I'm building a 3D printer, and I want to replace my endstop switches with hall sensors instead. I've bought some NJK-5002c hall sensors from Ebay, but am unsure how I can hook them up to replace the ...
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3answers
83 views

Hall effect device for circa 1 tesla gaussmeter

I'm thinking about building an unsophisticated bench instrument for measuring magnetic field density, just to support my learning about electromagnetism and building magnetics for power electronics ...
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43 views

Level shifting in OPAMP and HE100T01 interfacing problem

Hi, I want to measure current of 0-50A. For that, in my application I am using HE100T01 hall effect sensor which can measure current from -100A to +100A(depending on the direction of flow it gives ...
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67 views

Simple question on hall effect sensor

I am using the a hall effect sensor - model 480-5198-ND. I have tested this simple circuit using a LED and it is working. However, it is "ON" by default. Only when the magnet is near the hall effect ...
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45 views

current sensor LAX 100-NP PCB design

I am reading the data sheet for the LEM current sensor LAX 100-NP. I find the PCB design a bit confusing when it comes to high speed or low speed design. If you look page 11, left column, high speed ...
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1answer
132 views

Current sensing in buck converter - current sensing resistor or hall effect

I designed a simple buck converter working with voltage up to 15V and current up to 8A. It works great, but I would like to add current sensing now. I don't need anything that's super accurate and ...
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2answers
87 views

How can I build hall sensor based PWM dimmer?

So there is a hall sensor on a scooter throttle and it's missing the speed controller. I tested the sensor and it does work. 5V in, and with full throttle it's about 4V and 0.9 when closed. I want ...
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1answer
66 views

Hall effect sensor operational distance from magnet

I want to use a this hall effect sensor to detect the presence of magnet. I'm pretty sure I understand how to use the hall effect sensor, but I'm not sure how to calculate the distance the sensor can ...
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1answer
119 views

The Hall sensor in a BLDC - winding magnetic field interference?

I am wondering what is the impact of the magnetic field generated by the BLDC windings being energized on the rotor position measurements with the Hall sensor. I found some unclear explains stating ...
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389 views

How to sense RPM from 4 pin BLDC motor?

The title says it all. I'm doing a project with a spinning HDD disk with a slot cut in it, RGB LEDs, and precise turning on and off of the colors. I'm planning to glue a magnet and use a hall ...
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2answers
290 views

What is the difference between Hall Effect and Magnetoresistance?

I was learning about sensors. I was confused about the Hall Sensors and Magnetoresistive Sensors. They both seem to be same.
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64 views

hall effect sensor as a toggle swich for a 12v strip of LEDs

I'm trying to use a unipolar hall effect sensor as a power switch to turn off and on a 12V strip of LEDs, powered by a 12V 6.6Ah battery. I just tested the current draw of the LED strip with a ...
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160 views

Clamp Meter Working Principle

Basic theory of clamp meter to measure rms of current wave. What I have in mind is that wire creates the changing flux that induces voltage in the meter.This voltage is calibrated ? Also how does the ...
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4answers
239 views

Sensing current upto 2A w/ high resolution

I'm trying to sense a current that will flow in a motor (current shouldn't exceed 2Amps), and I'd like to have a high resolution on this measurement. I was hoping on using the ACS712, but it says the ...
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141 views

Multiple hall effect sensors in proximity

I'm interested in using a linear Hall effect sensor to measure displacement varying by about 1.5 inches. The idea is I have a piston with a magnet at the end and a Hall sensor at the end of the cavity ...
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1answer
91 views

Hall-sensor replacement for reed switch

I have a device in which a reed switch is encased in potting compound. (So impossible to identify.) My problem is, that for my application the switch is too slow. I am considering replacing it with a ...
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53 views

Good ways to read a 16-bit code at very short distances (~0.5cm)

I'm looking at ways to read a 16-bit code over a very short distance, through an opaque material. The sensors might be quite close to each other (~10cm), and they'll need to read only the code that ...
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243 views

Another motorcycle project: gear selection indicator [closed]

I have another little project that I have been thinking of making, but am having some trouble with the circuit design. In a nutshell, here is what I am envisioning: Objective: Create an electronic ...
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2answers
655 views

Problem with Hall effect sensor circuit to detect magnet position

I own a used Clavia ddrum4 SE drum module. It employs a fairly advanced technique to detect the position of the hi-hat; on the stand is mounted a magnet, and in the hi-hat pad is a Hall effect sensor ...
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98 views

chosing the right Hall effect sensor

For a student project, I need a Hall Effect current sensor. What I am going to do is to charge 8 rechargeable Li-Ion batteries of 3.7 volts in series with 34 volt supply and the buck circuit frequency ...
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3answers
1k views

Reading an ABS wheel speed sensor

I am trying to use an Arduino to intercept and send out modified wheel speed readings on a 2014 Subaru Forester. The problem I am running into is the wheel speed signal. From what I can tell the ...
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1answer
747 views

current control via microcontroller

I have a micro-controller which calculates and decides about the current each minute. Then for one minute the circuit must hold that current constant. Then it should control the current via a buck ...
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1answer
166 views

Testing hall effect sensor of a motor [Beginer question]

I would like to test the hall effect sensor of a motor (DC brushless Papst dual coil) I have for a small project of mine. I have found a bit of information online, but I cannot seem to figure out what ...
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2k views

Reduce noise from a Hall effect sensor

I am currently working on a magnetic levitation project using a Hall effect sensor for distance measurement. I drive the coil using two 12 V car batteries in series to form a 24 V DC source, ...
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3answers
446 views

Why do I need I large resistor to the GATE of my MOSFET?

I tried to control the brightness of a LED using a Linear Hall Effect Sensor fed to an Arduino, and PWM output to the gate of a MOSFET connected to a 12V battery. The LED was flickering a lot, and ...
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212 views

Weird Hall Effect Sensor output

I have just bought 3 linear hall effect sensrs of type SS495A. However, when I hook them up to my Arduino Uno's analog input, I get some really weird results. I use a 5V power supply, and my output ...
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256 views

bipolar linear hall effect sensor choice

ANSWER: This is the best one I found for my purpose mouser.be/new/Texas-Instruments/ti-drv5053-hall-effect-sensor I'm doing a project where I use Hall effect sensor as a proximity meter. Using to ...
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72 views

Does placement (high side vs low side) of a hall effect sensor matter?

So I ran into something interesting today. I have a hall effect sensor (L18PXXXD15) and I was attempting to measure current of a 30Vrms sine wave across a 50 ohm load. However, when I connected my ...
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2answers
223 views

How build coil for respiratory magnetometer or find a better option (hall effect)?

I am trying to build an respiratory magnetometer. This device is no longer widely used even thought it was well liked. The reason it is no longer used is due to the fact that the coils used in it were ...
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71 views

ACS758KCB Wiring Diagram

I am using the ACS758KCB Hall Effect sensor for a project. On the front page of the Datasheet it list a .1uF capacitor between Vcc and GND, in addition it lists a capacitor, Cf, between GND and ...
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33 views

Certain hall switch operation

I have a question regarding a Hall sensor IC. I cant quite understand how is it possible that it can operate only on 2 wires, instead of 3. The way I can think of it is that 2 wires provide Vcc and ...
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216 views

All sorts of fail converting Schematic to Bread Board

Schematic: Fritzing BB View: Total n00b: I am trying to layout my breadboard based this schematic, but I'm not sure if I've even come close. The LM34 in the graphic is actually a SS494B hall ...
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2answers
244 views

Turn off LED with Hall effect sensor?

I have seen many circuits which allow you to turn on an LED when a magnet is placed close to a Hall effect sensor. But I need a circuit that will turn off the LED when the magnet is close to the ...
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3answers
2k views

simple way to measure wheel spinning speed with Adroid phone + magnet (and maybe Reed Switch)

I'm trying to create the simplest/easyest/cheapest possible way to measure the speed at which a wheel is turning (like a bicycle speedometer) with a smartphone. On the phone the information will be ...
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1answer
234 views

Why isn't this LM2917 circuit working to turn off a transistor?

It was suggested to me that I should post a new question (original question here: Minimal Hall effect sensor circuit to keep something off after certain RPM achieved). The below schematic is for ...
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1answer
1k views

Difference between a magnetic field sensor and a hall effect sensor

I can't understand the difference between a magnetic field sensor and a hall effect sensor, to me are both the same. I have a voltage detector pen that I can use when I troubleshoot my house I ...
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1answer
341 views

Minimal Hall effect sensor circuit to keep something off after certain RPM achieved

I have a somewhat limited understanding of electronics and circuits. I'm trying to build a circuit that will keep a transistor in an off state after a given threshold of RPM is achieved using a A3144E ...
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197 views

Hall effect sensor or Reed switch unique identification

I would like to use a hall effect or reed switch as a proximity sensor, but also want to get identification of the item being sensed. There would be about 30 unique items. Does anyone know of an easy ...
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148 views

Using shielded cable on an ebike hub motor, what ground to use

I have been having strange issues with an ibike that I have built, in that interference keeps being generated from the motors phase wires into the RX/TX lines on the hall sensors. I have been advised ...
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3k views

What are the advantages of a shunt resistor vs. a hall effect sensor?

I'm constructing a boost converter, and I need to measure both the input current and the output current. Currents range anywhere from 25A to 200A, depending on the model. My controller is referenced ...