В роботі

Build a circuit

Circuit audit and update.

I had a circuit developed. The suitable contractor will receive the following files:

- BOM

- Eagle

- PCB

- PDF

- Snapshots

The circuit was built to be a square wave generator (not coded yet).

Specifications

Square wave.

Frequency value From Zero to 50,000 Hertz (if possible 150,000 but not necessary)

Accuracy 2 digits after the decimal in hertz.

Current output from 0 to 120 mamps.

The full job is in 2 phases. This is only phase 1 of the job.

Phase 1

The circuit was built to work with blue tooth installed. This phase does not require blue tooth. Therefore there is a need to remove the Bluetooth capability.

Besides removing the Bluetooth capability. Need to audit the circuit to find out if it is possible to use less parts. Maybe less expensive parts without sacrificing the specifications and efficiency of the circuit.

We will also need a power source for the device so created. Therefore I need to secure a good rechargeable battery Check the specifications of the 800 mah rechargeable batteries and select a good quality rechargeable li ion battery 3.7 V and 800 mah.

I found some on [url removed, login to view] the question would be which would be the lowest cost manufacturer that will deliver a good quality battery that can be recharged at least 300 times preferably 500 times or more.

You will need to create the firmware code that will allow to product to deliver a sequence of frequencies which will be hard coded.

The sequence of frequency could be as long as 120 entries.

Following is the data that needs to be hard coded

sequence number (from 1 to 120) , frequency (from 0.01 to 50,000 hertz or 150,000 hz), time in seconds, current intensity between 0 to 120 mamps, current bump (in percentages of current intensity, example in case current intensity is 10 mamp and current bump is 100% then the current for this data line will be 20 mamps)

The hard coding for the data entry should be easy to update, maybe a separate file the code can refer to.

You will also need to source components to build 3 samples. I will pay for components separately.

You will also test the samples built so and if the circuit needs to be updated, you need to update it to comply with the specifications.

Printout from testing equipment’s of test results.

Send us samples to test on our end for verification (I pay shipping to our facility)

Once we complete phase 1 I will release phase 2 that includes Bluetooth communication with a cell phone through an app.

Your offer should include milestones with price for each milestone.

If you have any additional questions I will be happy to discuss it thanks

Thank you.

Навички: Електроніка, Техніка

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Про роботодавця:
( 7 відгуки(-ів) ) Old Westbury, United States

ID проекту: #9609242

Доручено:

geekyexperts

Hello, I am an Electronics and Embedded system developer. I have experience in Digital and Analog electronic design and Matlab. Kindly check my profile. Reply me back and will discuss the details further. Thankyou

$750 USD за 20 дні(-в)
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6.1

20 фрілансерів(-а) подали заявки на цю роботу; середня заявка - $731

MikroStar

hi, i am an electrical engineer. i have expertise in embedded system design and Matlab.i can help you with this project. Please check my profile for my previous work [url removed, login to view] reply back and let us discuss pro Більше

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sagradoamicus

A proposal has not yet been provided

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5.5
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voyagerforth

Hi, From your stated specifications I assume you need only the modifications specified, and the three prototypes built and delivered. Apparently you have something half built and need it completed. I have the skill Більше

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mamdouhmaitah

How are you?! I'm Mamdouh Al Maitah, i am happy to write to you a summery about me, i am electromechanical engineer, i studied in Jordan between 2007-2011 I've worked in electronics company here in Jordan, i a Більше

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$555 USD за 10 дні(-в)
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thathvik

Hello, We are a team of embedded hardware and software professionals with experience in circuit design, schematic and PCB layout. Would like to know more details about the deliverables at this stage. Looking fo Більше

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CoherentTech123

Hello Dear, We are a team of experts with a cumulative experience of more than 50 years in the field of embedded systems, programming, electronics and PCB layout. We offer services from product concept to Більше

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3.7
ElectroStrom

i am an electronic engineer with more than 6 years of experience. i have experience with PCB designing and firmware programming. i can work on this project. please contact me to discuss details.

$500 USD за 14 дні(-в)
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3.6
$666 USD за 25 дні(-в)
(4 відгуків(-и))
2.7
vitamin4ik

Hello! I and my friends are experienced have done many similar tasks before and guarantee that this task also will be done in a time and quality manner. We've made PCB design, circuit design (Eagle, Alitum,PCAD), Більше

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Ktronics

Here is briefly of my working experience. PCB Manufacturing Experience : - Honeywell(Navcom, Digital Radio, Black Box) - Samsung Electronic - Microwave Oven PCB. - UPS product. - PCB Assembler, Repair Enginee Більше

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nerminbih

Hi,I'm a graduated electrical engineer and I think I got the qualifications and knowledge needed for the job.I hope you hire [url removed, login to view] regards.

$444 USD за 7 дні(-в)
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vougavent

Vougavent provides a full range of product development services to our technology clients. Our technical staff comprises highly talented professional engineers with a history of successful product development and innov Більше

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display1

We will use Arduino or avr atmega32 , and simulated system in Proteus. You can test the system via Team viewer. We will receipt any complain and upgrade.

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Santoshnath

A proposal has not yet been provided

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BALAFUTURE3

I will do it perfectly

$333 USD за 10 дні(-в)
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0.0