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SparkFun COM-09312 Hall Effect Sensor

SparkFun COM-09312 Hall Effect Sensor
 SparkFun COM-09312 Hall Effect SensorSparkFun COM-09312 Hall Effect Sensor 
Our Price:  £1.00(Inc. 20% VAT)(£0.83 Exc. VAT)Earn 1 Loyalty Points

SKU:  PPCOM-09312
Part Number:  COM-09312
Brand:  SparkFun

Available Now:  

95 in stock, immediate despatch
Higher Quantities Available within 3-5 Working days
  (2 Reviews)

SparkFun COM-09312 Hall Effect Sensor

The US1881 is an integrated Hall effect latched sensor. That’s nice but what does it do? Holding a magnet near the sensor will cause the output pin to toggle. This makes for a robust presence sensor. A reed sensor also works nicely, but can be limited by the glass encapsulation and size. A hall effect sensor is much smaller, but can handle less current than a reed switch.

The device includes an on-chip Hall voltage generator for magnetic sensing, a comparator that amplifies the Hall voltage, and a Schmitt trigger to provide switching hysteresis for noise rejection, and open-collector output. An internal bandgap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range.

If a magnetic flux density larger than threshold Bop, DO is turned on (low). The output state is held until a magnetic flux density reversal falls below Brp causing DO to be turned off (high).


  • 3.5V to 24V DC operation voltage
  • Low current consumption
  • Temperature compensation
  • Wide operating voltage range
  • Open-Collector pre-driver
  • 50mA maximum sinking output current
  • Reverse polarity protection
  • Lead Free Package: TO-92


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Customer Reviews
Average Rating (2 Reviews):  
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hall senser
Tuesday, 9 May 2017  |  Colin

good product, but could have arrived in a plain envelope for pennies.
I do not require sweets either!!!!

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Hall effect transducer
Friday, 7 February 2014  |  Mike

Delivered promptly. Not tried them out yet so can't assess performance.


2 of 2 people found this review helpful.