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

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25 views

Diffence between a magneto-resistometer and a capacitative displacement sensor [on hold]

I'm going through the specifications of a side project trying to replicate an equipment. A magneto-resistometer to measure displacement on a flexure is used. I started to look for prices, and the ...
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1answer
51 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
51 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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2answers
51 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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1answer
51 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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1answer
767 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 ...
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1answer
84 views

Linear hall sensor to detect large fields with digital output?

For an application I need to measure magnetic fields in the range between -200mT to +200mT with sub-mT resolution. Additionally a microprocessor is available but I don't have a high resolution ADC and ...
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1answer
127 views

Two ICs actively driving same line

For a hobby project, I want to connect my own circuitry to a PCB which I have not developed. On the PCB is a linear hall sensor which outputs a voltage at about VDD/2 when a magnetic field is not ...
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1answer
62 views

Amplying hallsensor Output

I am planning to use Hall sensor.I am trying to measure The high DC current up to 20A .Is any can share link to Build ampilfied network to amplify hall out put and feed back to Arduino. And another ...
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4answers
124 views

Hall effect sensor as toggle switch

I know little enough about electronics to have to ask basic questions :P If I wanted to use a hall effect sensor as a toggle switch what is the minimal circuit that could be used? Essentially want ...
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1answer
89 views

Detecting position — Hall effect sensor?

I have an extruder that is producing a molten plastic filament that cools after a brief while (2-3 seconds). The plastic stream needs to be a consistent diameter, and one method of doing this is to ...
2
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1answer
107 views

hall effect sensors for magnet position

this may be more of a geometry question than an EE one, but i'll ask it here anyway. I'm trying to build a weather vane, and am looking at using several linear hall effect sensors (such as the allegro ...
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2answers
391 views

Why don't hall effect current sensors exist for low currents?

There do not seem to be hall effect current senors available for small currents, say on the order of 500mA. I'm guessing this is due to some technical or physical limitation. What is it?
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3answers
186 views

What exactly is the purpose of a Hall sensor in a BLDC?

I was reading an articles about brushless DC motor, used in CPU fans, from this link. First I thought that the Hall sensors are used only for measuring the speed, but that is not correct, it has ...
3
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1answer
323 views

Connecting linear Hall Effect sensor directly to microcontroller ADC

I am planning on connecting an Allegro A1318 Hall Effect sensor to a 12-bit ADC on an NXP LPC1751 micro. My application is to compare relative differences in magnetic fields between various magnets. ...
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0answers
123 views

How to pass +12V onto a wire without a relay?

I am working with hall effect sensor, which sends 10.75V on output wire when sensor fully active (the sensor is used in clutch pedal switch to tell the vehicle when clutch pedal is pressed or not). I ...
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0answers
72 views

How to decode the hall-effect sequence from a motor?

I have a motor running in open loop (voltage controlled PWM/ freq.) and am reading the values of the 3 hall-effect sensors via UART. Ideally, I thought the data would show 6 commutation states with 6 ...
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0answers
261 views

Analogue Hall sensored brushless outrunner motor position control

I would like to produce a low cost high power:weight servo drive using a brushless outrunner motor, like those use in radio control planes: Some of these motors leak enough magnetic flux out the ...
4
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1answer
510 views

Is the Holzer effect the same as the Hall effect? (looking for replacement sensor)

I was looking for a replacement component for what I thought would be a "Hall effect sensor" (used in an electric scooter throttle handlebar). I had bought a replacement throttle about a month ago, ...
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1answer
216 views

How to implement a radial encoder with a diametrically magnetized magnet using a hall-effect sensor?

I want to implement a rotary encoder that doesn't use optical sensing or physical contacts. I found the following solution using a diametrically magnetized magnet on the shaft, and a dual axis hall ...
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1answer
850 views

AH276 hall effect sensor with microcontroller (sensor already in circuit - brushless fan)

I'm currently trying to read an AH276 hall effect sensor using an AVR microcontroller. The sensor is built-in in a brushless fan I'm using and it's operating as the fan's controller. The sensor has ...
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1answer
79 views

How do I know what the right signal amplifier to use is in order to program a hall-effect sensor?

I am trying to look for a signal amplifier in order to program the sensitivity and offset of the A1362 Hall-Effect sensor. Doing a simple google search reveals: ...
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1answer
573 views

How to use PIC A/D converter with ACS712 Hall effect current sensor

I have built a one amp power supply and want to use a Sparkfun ACS712 Hall effect current sensor with a PIC and 7 segment LED display to show the current in milli-amps. The PIC A/D input has ground as ...
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2answers
373 views

How do I know if my hall-effect sensor is working correctly?

On pg. 18 Figure 5 of this data sheet you will see a pulse train required to program the sensitivity of the A1362 Hall-Effect sensor. I am using the following circuit: Using Figure 5 from the ...
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1answer
452 views

Is it possible to program a hall-effect sensor with an Arduino?

On pg. 18 Figure 5 of this data sheet you will see a pulse train that allows for programming the sensitivity of the A1362 Hall-Effect sensor. So far I have tried to manually apply required voltage ...
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1answer
58 views

Am I following the procedure to set the sensitivity in Try Mode for the A1362 Hall-Effect sensor correctly?

I am following Figure 5 pg. 18 of this data sheet: Vp(HIGH), Vp(MID), Vp(HIGH), followed by 0-255 Vp(MID) pulses that increase the sensitivity each time Vp(MID) is applied. However, when I bring ...
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1answer
132 views

Why do my 3 custom voltage pulses stop working as soon as I plug in the A1362 Hall-Effect sensor?

Why does the Vout pin in the diagram below receive 8 volts with Vcc = 0 volts, but becomes 2 volts when Vcc=5 volts. If switch SW9 is closed, circuit theory says Vout should always stay at 15 volts ...
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2answers
52 views

Why does the data sheet for A1362 have conflicting procedure to program sensitivity?

This data sheet shows two different ways to program the sensitivity of the A1362 on pg. 18 2nd paragraph under "Hold Mode" says "Powering the VCC supply automatically causes the device to enter the ...
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2answers
766 views

Sensing magnetic pulses from a rowing boat impeller

I'm a mechanical engineer at uni who has some basic experience in electronics and programming. I'm building a system for my rowing boat to help me with my training. This will give me feedback on a ...
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64 views

What values for Vin, V1, and V2 should I use to correctly program sensitivity parameter for A1362 sensor?

On pg. 15 of A1362 Programmable Linear Hall Effect Sensor you will see Voltage Pulse {High, Med, Low} defined for the Allegro A1362. Using observed values of MSP430's digitization, I need to select a ...
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1answer
149 views

What is the proper way to set the offset and sensitivity parameters for Allegro A1362 so MSP430 properly digitizes them?

What is the proper way to set the offset and sensitivity parameters for Allegro A1362 Programmable Linear Hall Effect Sensor so that TI MSP430 5528 properly digitizes them? Using observed values of ...
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1answer
93 views

How do you find accurate slope for these two hall effect sensors?

I'm looking at two current sensors. ACS712 and L18P005D15 At this stage, I'm just trying to understand how the Vout is related to Iin. Looking at the ACS712 sensor, I see the following Does this ...
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3answers
719 views

How can I detect my vehicle's shifter position? Will a Hall Effect Sensor work?

I drive all Manual Transmission vehicles, and after a long battle of wills with my girlfriend, she has conceded that she would learn if there was a display that showed what gear was selected, thinking ...
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1answer
416 views

Reading a Open Loop Current sensor

I am using a LEM HAIS 200-P and I never have worked with Open Loop current sensors before. I have some questions about the datasheet: What is the difference between Primary nominal RMS current and ...
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1answer
2k views

Difference between Open Loop and Closed Loop Hall Effect Current Sensor

I think the title says it all, but in any case, I want to know the difference between the open loop, and closed loop, hall effect current sensors, such as the LEM HAIS 200-P.
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3answers
478 views

Hall-effect switch or photointerrupter

I'm dealing with a small automation project, a rack and pinion system controlled by an Arduino card with two limit switches to ensure that the rack moves within the boundaries. I have been trying both ...
3
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3answers
2k views

How to convert a three wire hall effect sensor to a 2 wire sensor?

Would there be any possibility to convert a three-wire hallsensor to a 2-wire equivalent. The connections are a V+, GDD and OUT. The voltage between V+ & GDD would be 24V and the OUT port would ...
4
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3answers
590 views

Measuring the rotation of a bicycle steering wheel

I would like to mount a bracket onto the head tube of a bike frame to measure the degree of rotation the bike's handlebars have been turned. Ideally, this would be a contactless solution to increase ...
3
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2answers
374 views

Sending data over a magnetic field

I need to find a way to trigger this Hall Effect Sensor with a non-permanent magnet. Does anyone know if an inductor's magnetic field would be strong enough? Or am I going to have to build an ...
2
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1answer
325 views

Starting with Hall effect sensor

I have been playing around with a ASC758 in a PSS Leadform package. After reading the datasheet I am still thoroughly confused. Can someone please help me understand this sensor. What I am confused ...
3
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2answers
820 views

measuring current drawn from a 3-phase AC induction motor using a digital circuit

My background: I have some experience with digital circuits and microcontroller programming but no prior experience with or knowledge of industrial equipment like motors/pumps. All in all, a ...
3
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1answer
486 views

Hall effect sensor output type - open collector vs RC

I am about to select a hall effect sensor. Two types are available: one has an open collector (OC) output, the other an RC output. The datasheet states that both are current sinking. But because I ...
3
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1answer
1k views

Strange (flyback?) diode in a circuit with a transistor switching an inductor

Edit: The following question is related to a perpetual motion machine, a "Selfrunning Free Energy Muller MotorGenerator powering a 20 Watt bulb" The switching device shown on the circuit was ...
3
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4answers
428 views

High-bandwidth current measurement

We need to measure +-50Amps of current (PWM) on a PCB. We need the measurement to be isolated, so I thought of using an ACS758, and feeding its output to an ADC. However, this hall effect sensor is ...
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1answer
391 views

Using a 4-pin computer fan controller without the load

Is it OK if I use the controller from a CPU fan without connecting the motor's coils? All I want is to use the Hall effect sensor. The datasheet is posted here, the driving output circuit uses a ...
2
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2answers
2k views

How to drive a BC547 using a 0-5V sensor output?

I have an i-Snail-VC-50 sensor with an output of 0-5V. I'd like to connect this output to the base of a BC547 transistor, which powers an LED with an external 5V power source. What I want to achieve, ...
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2answers
601 views

CNC Servo motor current measure

What methods and equipments can I used to measure and record the current variation of CNC servo motor while machining.
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1answer
586 views

Old Hall-Effect Keyswitches?

I have a keyboard from an old Silent 700 TTY that I'm trying to bring to life. The problem is that each individual keyswitch appears to be a hall effect sensor. There are no part numbers; the chip ...
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3answers
1k views

How to convert a voltage range to LED brightness without a microcontroller?

I have a hall effect sensor which outputs 0V when on the North pole of a magnet, 5V when on the South pole. It idles at 2.5V. I want to connect 2 LEDs to show the reading, one activated from 0-2.5V, ...
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7answers
29k views

How do I measure the RPM of a wheel?

I'm trying to make an onboard system for my bike using an Arduino or maybe the Lilypad boards. I think I should use a Hall effect sensor, but any alternative is good as well. I want to output my ...