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Home | Product Categories | Infrared | SEN-00242

Infrared Proximity Sensor - Sharp GP2Y0A21YK

sku: SEN-00242 RoHS Compliant In Fritzing Library

Description: Infrared proximity sensor made by Sharp. Part # GP2Y0A21YK has an analog output that varies from 3.1V at 10cm to 0.4V at 80cm. The sensor has a Japanese Solderless Terminal (JST) Connector. We recommend purchasing the related pigtail below or soldering wires directly to the back of the module.

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13.95
12.56
11.16

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ASCII version


Comments 16 comments

  • EmbeddedMicro | about 4 years ago 2

    Great little sensor. It does take large pulses of power so make sure you have a capacitor near it.
    Justin
    http://coilgunpower.com

  • pjwerneck | about 2 years ago 2

    These sensor are great, however, if you want precision I recommend getting one with at least 1.5x the max range you expect. The output isn’t linear and if you check the curve on the graph you’ll see how the resolution gets lower with distance.

  • doggenj | about 2 months ago 2

    Arduino library for the Sharp GP2Y0A21YK IR Distance sensor: http://code.google.com/p/gp2y0a21yk-library/

  • Landon | about 3 years ago 1

    These a great little devices. I have used them extensively in a speed climbing timing system I’m building: http://twurl.nl/1gpjdj

  • Engineer04915 | about a year ago 1

    carful using these on real projects at work…there obsolete!

  • Dloranger | about a year ago 1

    I bought one of these modules to add vision to a robot I am working on and the output can’t drive the ADC (ATMEGA uC) input. When I measure with a DMM (10MOhm) output is as expected, but trying multiple ADC inputs, the reading is about 60% and won’t move.
    Good sensor, but recommend adding an analog buffer in series with the output just in case.

    • TomBot | last year 1

      Make sure you don’t have the internal pullups (~40k) enabled. (digitalWrite() the pin to 0 to disable)

  • oz-solutions | about a year ago 1

    will any of these work with 3.3V ?

    • Eggman | about 9 months ago 1

      Sadly, they don’t. At 3.3V you can get some wild voltage swings even when the distance to target is fixed.

  • Adam Davis | about a year ago 1

    Please consider adding these proximity sensors (there are three in your catalog) to the proximity sensor category.