High-pitch tone transmitter + receiving app code

$750-1500 USD

진행 중

게시됨

약 11년 전

$750-1500 USD

제출할때 지불됩니다

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

프로젝트 ID: 4311065

프로젝트 정보

4 제안서

원격근무 프로젝트

활동 중 11년 전

돈을 좀 벌 생각이십니까?

이메일 주소

프리랜서 입찰의 이점

예산 및 기간 설정

작업 결과에 대한 급여 수급

제안의 개요를 자세히 쓰세요

무료로 프로젝트에 신청하고 입찰할 수 있습니다

프로젝트를 수여된 사용자:

@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 35일에

4.9

(30 건의 리뷰)

6.1

4 이 프로젝트에 프리랜서들의 평균 입찰은 $1,388 USD입니다.

@WangJin

Please check PMB!

$1,500 USD 10일에

4.8

(29 건의 리뷰)

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 30일에

4.9

(36 건의 리뷰)

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 25일에

4.7

(11 건의 리뷰)

4.8

@DrFreelancer2012

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

$2,000 USD 21일에

4.5

(7 건의 리뷰)

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 25일에