An emitter that sends ultrasonic signal on 22 Khz

$750-1500 USD

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大约 12 年前

$750-1500 USD

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I need an emitter in about 200 pieces. It should be able to send a inaudiable signal on like 21 Khz which cannot be heard be humans - and it should be able to send the signal in "a bit sequence (ID) protocol", so different signal can be recognized. It is should work like the device used in this video - see 1.06 minutes: [login to view URL] -

Android

iPhone

Manufacturing

Mobile App Development

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项目 ID: 1485347

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活跃12 年前

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@techgurudesk

It would be great to work with you ... Kindly see PMB for further details ... Thanks ...

$999 USD 在19天之内

4.7

(23条评论)

5.2

@seekdeveloper

Hi, Kindly check PMB

$1,700 USD 在30天之内

4.5

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4.9

@Phil31

Hi, bid for clarification, please check PMB

$750 USD 在2天之内

5.0

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4.2

@ENGKAM

Hi, I am a hardware engineer with proven design capabilities from the industrial field. I can design you this modules and I can start immediately. Please see my private message.

$1,500 USD 在30天之内

0.0

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@ghalibjanjua

My team can do it for you.

$1,500 USD 在30天之内

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@bachelorlko

See PM for detail.

$1,100 USD 在20天之内

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@henrywilson007

Hello Sir, Please check PMB for listing and confident to complete the project with quality services.. Best Regards

$800 USD 在10天之内

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@phpMaestro

Hi, We are a team of developers and designers who are in this field from more than 10 years. We are a web design and Development Company, providing web development in PHP, CMS based websites, E-commerce website, Wordpress web design template, logo design, banner design, flash... We also provide SEO and hosting services. Please check PMB. Thanks and Regards, Manish %__%

$1,450 USD 在30天之内