High-pitch tone transmitter + receiving app code

$750-1500 USD

进行中

已发布

大约 11 年前

$750-1500 USD

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What I need is a piece of hardware transmitting a constant high pitch tone not hear able to humans that send info. This sound would have to trigger an app or be detected when the app is opened. The device would have to be able to be plugged into the wall socket. You should be able to change the tone when connected to a computer. Make the transmitter as simple as possible and with common parts. This to ensure flexibility to possible mass production. Something alone the lines of shopkick and sonic notify. -provide full documentation of both hardware and software. Please only serious people.

Electrical Engineering

Mobile App Development

Product Design

项目 ID: 4311065

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4提案

远程项目

活跃11 年前

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颁发给：

@carelle

Hello! I've Ph.D. in Electronic Engineering and BSc in Physics. I work with Analog Electronics and PCB design. I can do what you need with quality and reliability!

$1,250 USD 在35天之内

4.9

(30条评论)

6.1

4威客以平均价$1,388 USD来参与此工作竞价

@WangJin

Please check PMB!

$1,500 USD 在10天之内

4.8

(29条评论)

7.2

@MikroStar

hi, i am an electrical engineer and an embedded system developer. i can help you with this project. i will provide you all design files, schematics and PCB layout. also i will provide you the working prototype.

$1,800 USD 在30天之内

4.9

(36条评论)

6.0

@betaenergy

Dear Sir, We are Reserach and Development company whose working area are : -Digital Motor Control -Analog Design -Electronic Design -Power Electronics -PCB design -Embedded system -Matlab -Simulation of hardware For each concept descriptions are as follows: Digital Motor Control: -3-phase induction motor vector control drive -Flux estimation algoritm generation -DSP(TMS320) implementation on motor drive -Low speed application -Torque and speed loop generation -Control algoritms Analog design -Low power distribution -Noissless special opamp based analog circuits -Analog filters -Orcad simulation of several circuits Electronic Design -RF transmitter and receiver -Bluetooh reader and transmitter -Magnetic reader Power Electronics -Implementation motor drive -AC/DC converter -DC-DC converter -Battery charger -Solar inverter -Renewable Energy simulations -Uninterruptle power supplies PCB design -Schematic design by Altium -PCB design by Altium -Power board design -SMPS board design Embedded system -PIC18,PIC24,PIC30 and dsPIC applications -Ardino -MSP430 -Atmel -DSP(Texas Instruments) -Renesas Matlab -Power Electronics simulation -Motor drive -Wind Energy -Solar Energy -Control applications Simulation of Hardware -Orcad Simulation(TI,National, Linear Tech, Maxim libraries) -LTI -National -Matlab Very important Note: References attached. Please look excel file to see projects which we made until now! Metin

$1,400 USD 在25天之内

4.7

(11条评论)

4.8

@DrFreelancer2012

Hi there, I have a PhD (doctorate degree) with an academic position.

$2,000 USD 在21天之内

4.5

(7条评论)

3.8

@getveltrod

Hi, Veltrod Software services is a global software consulting company specialized in providing Mobile applications, Social media frameworks and eCommerce solutions. Leveraging best-in-class people, processes, and technologies, Veltrod provides high-quality software development and BPO services to independent software vendors and enterprises. We are specialized in developing Mobile applications, Search Engine optimizations, Social Network frameworks, Software Testing and ERP applications. We are pleased to take care of this project, if it is offered to us. We assure that we will work towards 100% client satisfaction. Thanks Vinoth

$1,300 USD 在25天之内