Difference between revisions of "ECE 110/Equipment/Hall Effect Sensor"
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(Created page with "{{LaTeX Shortcuts}} == Pins == * 1 (left): Supply voltage $$\E{V}{CC}}$$, typically 5 V * 2 (middle): GND * 3 (right): vout between 0 and $$\mathrm{V}_{\mathrm{CC}}$$ == Ope...") |
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| Line 2: | Line 2: | ||
== Pins == | == Pins == | ||
| − | * 1 (left): Supply voltage $$\E{V}{CC | + | * 1 (left): Supply voltage $$\E{V}{CC}$$, typically 5 V |
* 2 (middle): GND | * 2 (middle): GND | ||
* 3 (right): vout between 0 and $$\mathrm{V}_{\mathrm{CC}}$$ | * 3 (right): vout between 0 and $$\mathrm{V}_{\mathrm{CC}}$$ | ||
| Line 13: | Line 13: | ||
* | * | ||
| + | == Sample Code == | ||
| + | <syntaxhighlight lang=C++> | ||
| + | const int Hall_In = 0; | ||
| + | const float VCC = 5.0; | ||
| + | void setup() { | ||
| + | Serial.begin(9600); | ||
| + | } | ||
| + | |||
| + | void loop() { | ||
| + | float Hall_Reading = analogRead(Hall_In); | ||
| + | float Hall_Voltage = Hall_Reading * VCC / 1024.0; | ||
| + | float Hall_Gauss = (Hall_Voltage - (VCC/2)) / 0.005; | ||
| + | Serial.print("Analog reading = "); | ||
| + | Serial.print(Hall_Reading); | ||
| + | Serial.print(" "); | ||
| + | Serial.print("Analog voltage = "); | ||
| + | Serial.print(Hall_Voltage); | ||
| + | Serial.print(" "); | ||
| + | Serial.print("Flux density = "); | ||
| + | Serial.println(Hall_Gauss); | ||
| + | delay(100); | ||
| + | } | ||
| + | </syntaxhighlight> | ||
* https://www.allegromicro.com/en/products/sense/linear-and-angular-position/linear-position-sensor-ics/a1324-5-6 A1324, A1325, A1326: Low Noise, Linear Hall Effect Sensor ICs with Analog Output ] | * https://www.allegromicro.com/en/products/sense/linear-and-angular-position/linear-position-sensor-ics/a1324-5-6 A1324, A1325, A1326: Low Noise, Linear Hall Effect Sensor ICs with Analog Output ] | ||
Revision as of 22:21, 17 August 2022
$$\newcommand{E}[2]{#1_{\mathrm{#2}}}$$
Pins
- 1 (left): Supply voltage $$\E{V}{CC}$$, typically 5 V
- 2 (middle): GND
- 3 (right): vout between 0 and $$\mathrm{V}_{\mathrm{CC}}$$
Operation
The voltage on the third pin will vary depending on the supply voltage and the magnetic flux density through the Hall effect sensor. If the magnetic flux density is 0 G (where G stands for gauss), the third pin will read
Assuming a 5 V external supply, pin 3's voltage will be between 0 and 5 V. A voltage of 0 V indicates the strong presence of a south pole while a voltage of 5 V indicates the strong presence of a north pole. An output of 2.5 V indicates no magnetic field. The sensitivity is 5 mV/G (where G stands for gauss)
Sample Code
const int Hall_In = 0;
const float VCC = 5.0;
void setup() {
Serial.begin(9600);
}
void loop() {
float Hall_Reading = analogRead(Hall_In);
float Hall_Voltage = Hall_Reading * VCC / 1024.0;
float Hall_Gauss = (Hall_Voltage - (VCC/2)) / 0.005;
Serial.print("Analog reading = ");
Serial.print(Hall_Reading);
Serial.print(" ");
Serial.print("Analog voltage = ");
Serial.print(Hall_Voltage);
Serial.print(" ");
Serial.print("Flux density = ");
Serial.println(Hall_Gauss);
delay(100);
}
- https://www.allegromicro.com/en/products/sense/linear-and-angular-position/linear-position-sensor-ics/a1324-5-6 A1324, A1325, A1326: Low Noise, Linear Hall Effect Sensor ICs with Analog Output ]
