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Have a question about Sensors? Ask our expert Jane Awittor

patkelly

Jane's Expertise:image Sensors.

 

About Jane:

Jane is a technical specialist for Panasonic, supporting a broad line of sensors such as pressure, passive infrared, active and infrared array sensors.  Whether it’s a new design or an upgrade to existing design, Jane has the technical expertise to support customers with their various sensor requests.

 

She is an electrical engineer with 5 years of experience specializing in Passive Infrared (PIR), Infrared Array and Pressure Sensors. Focused on technical sales support and interface to research and development teams in Japan. Developed proposals for new product enhancements, competitive product studies and SWOT analysis.

 

 

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  • in reply to Former Member

    The sensor specification states that the maximum output current is 100uA so it isn't really capable of driving an LED - if your resistor is at least 60k the sensor would be OK but I'm not sure that you'll be able to see the LED at all. If you buffer the output with a mosfet or transistor for LED driving it would be better. You may also need a decoupling capacitor across the sensor power supply.

     

    MK

  • Jane

     

    I am using two geo-thermal heat pumps in my home.  To prevent damage to the heat pumps I must ensure the closed loop water lines are full and pressurized whenever the heat pumps are operating.   I am looking for a inline pressure transducer that will work with my Arduino controller and detect water pressure in the range of 10 to 50 psi.   What do you recommend?   Thanks    Dave

  • in reply to michaelkellett

    Hi Michael,

     

    Thanks for your reply.

     

    The PIR is getting its power from the 5V0 pin of a raspberry pi, and grounding through the same device.  It is not otherwise attached to the rpi in any way. 

     

    I am using a 120 Ohm resister between the output of the AMN31111 to the LED.  The LED is quite visible.

     

    But I'm only using the LED to test that the PIR works as I envisaged it would.  The plan is to wire the output of the PIR to a GPIO pin on a Raspberry Pi.  But first, I am trying to understand why the PIR keeps flashing the LED when there is no motion in front of the sensor.  I have tried pointing it into the back yard at night time where I know there is nothing in front of it within its detection range, and yet it still flashes the LED in a repeating pattern as described in my original post.

     

    Any ideas?

     

    Thanks


    Damien.

  • Hello!
    I am studying about ultrasonic signal and sensors. I have apply it in distance measurement, proximity, echo etc. However, looking at ultrasonic animal repellent what kind, types, or class transducer (sensor) can one use to give best result. please with physical description or part number.

  • Hello Jane,

    I am studying new product development in grad school and we have an assignment to develop a market opportunity analysis for a sensor technology developed by NASA, called Single Coil Absolute Position Switch. It is a limit switch with absolute position function. The full description is available on the NASA web site here: https://techtran.msfc.nasa.gov/technology/TOP32224-1-Linear-Position-Sensing-Portfolio.php#scaps

     

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    My research suggests no similar sensor product is available in the market with combined limit switch and absolute position feedback. It seems like this would be an ideal sensor for applications such as: Elevator Positioning at floor level, or for use on CNC machinery for "homing" to calibrate the start position, or other linear machinery that requires an accurate starting position.

     

    Can you please offer an opinion about whether these specific applications are feasible for this sensor technology? Can you suggest other applications? If this sensor is a viable product, would Panasonic be interested in licensing the technology from NASA? We will get extra credit if we can find a home for this technology ;-), and we certainly would appreciate any insight or direction you might be able to offer!

  • in reply to Former Member

    Hi, In case you would stumble over the same problem and end up here after deep google searches typing "AMN31111 always high" like the above thread initiated by Damien: here's how I worked around the problem: The reason I got always 1 is that there's a need for a pull-down resistor which I hadn't, and you probably neither. One easy way (at least if you are on an arduino, or esp8266, is to use the analogue pin: as soon as I switched to the A1 pin on my esp8266, I could clearly distinguish a "preson in range" signal =1024 from a "no person in range" signal around 5 or more ... I guess the digital input translated the later one into high without the pull-down resistor.

  • Hello,

    I am using a Reconyx pc800 trail camera. The sensor is overeactive and the company said it needs a replacement . But there is no factory in my country ,so I nees to do it myself. The sensor is LHI 968. Will I be able to do it my self? what can go wrong.