[Electrical Engineering Project] Build a bluetooth enabled voice recording device

$250-750 USD

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over 5 år siden

$250-750 USD

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Hi all, Goal is to build a device that will record conversations, save them on the device, and sync to an iOS based. The battery life needs to support ~3-4hours of conversation recording (ideal would be 6 hours) Form factor will be important and will need to be somewhere in (65mm x 35mm) range. Some thoughts on what a POTENTIAL (Please improvise) solution can be, 1. The core processor would be an ESP32, which has both BLE and WiFi capabilities. Also it has a good community driven libraries. (The bare module is 1.9cm/2.6cm in size) 2. Add to it another set of LiPo -HiPo, based on need, charger. 3. Add a storage SD slot 4. Battery like: [login to view URL] 5. Another great way would be to use an NRF5x that would be much smaller and more power friendly. [login to view URL] for size reference Attached some info / calcs for the above. Steps and milestones will be: 0. Sourcing the NRF52DK, I2S microphone 1. Program for mic and NRF52 to record voice 2. Program to save recorded data to SD card as byteStream 3. Program to send data from SD card to BLE target device 4. Add battery and charging circuit for testing 5. Build final schematics if 1-4 work as expected 6. Build PCB as per dimensions agreed upon 7. Prototyping of the device at a fab house, as per fab house actuals 8. 3-D printed case, as per fab house actuals 9. Test and final deliverables

Bluetooth Low Energy (BLE)

Electrical Engineering

Electronics

Mobile App Development

PCB Layout

Projekt-ID: 17679451

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22 forslag

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Aktiv 6 år siden

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22 freelancere byder i gennemsnit $743 USD på dette job

@highfliercnr

Dear Sir, I am an highly skilled board designer who has over 17 years experience on complex, multi layers PCB design. I can provide you with service from schematic entry to PCB Layout.I can also provide the prototype service. Please message me if you are interested or want to learn more. We can discuss further. EDA Tools: Altium17, Pads, Orcad, Eagle8.. Thanks

$1.333 USD på 13 dage

4,9

(116 anmeldelser)

8,3

@zarnescugeorge

Hello! How are you?! I have 10 years experience as an electronics pcb design engineer! Please check my profile to see several of my projects. I have the experience and know how to help you asap! Have a great day!

$833 USD på 7 dage

5,0

(91 anmeldelser)

7,2

@ahmad5857

Hi Sir, We have the ESP32 CHIPS with us and we can do this kind of project for you. Lets talk to us on this project. We are professional engineers and developers who do such projects from the last eight years. We offer you our skills for this project at very low rates comparatively without compromising the quality of work. Let me introduce you to our company TURKTRONICS. We are TURKTRONICS. We are professionals with 8+ years of experience in Circuit designs, PCB designs, embedded system solutions, mobile app development, programming and software development. We provide complete end to end solutions for all kind of development projects. IOT is our strong point. In this bid, prototyping and shipping cost is not included however paying extra slight of money to include prototypes. We have the manufacturing facility and we produce the very high standard PCB boards and send ready products to customers doorsteps via DHL. We care about our clients and help them to get out of any potential problem throughout the projects and also give post completion technical support if ever required. We are very much looking forward to hear from you on this in coming days! Cheers!!! Ahmad Lead Technical Engineer TURKTRONICS An Internet of Things Company !

$750 USD på 25 dage

4,8

(47 anmeldelser)

6,8

@RaspberryOculus

Dear Sir, I am an electrical engineer with 19 years experience in this area . I am interested in your project : [Electrical Engineering Project] Build a bluetooth enabled voice recording device Please send a private chat message.

$1.388 USD på 10 dage

4,7

(23 anmeldelser)

6,6

@hayat38402

hi how are you i have good experience in this files, i can give you good quality work within your time. text me so that we can further discuss this work. thanks

$555 USD på 10 dage

4,6

(47 anmeldelser)

5,9

@braincenter

I believe that my experience and skill in this background will prove to be of great help to you. Contact me to discuss more on the details

$250 USD på 10 dage

4,2

(12 anmeldelser)

4,3

@Valuesolutions

Hello, i have read the details provided..please contact me to discuss more on the project deadline and some other few things

$250 USD på 10 dage

4,1

(11 anmeldelser)

4,7

@RakSharma

Hi Hope you are doing good!!! I have gone through your requirements and I a sure you that I can do this for you as I have more then 5 years. Feel free to sms me. I available for you according to your timings. Thanks Rakesh Kumar

$677 USD på 20 dage

4,3

(9 anmeldelser)

3,6

@Syed23365

i am a professional electrical engineer i have years of experience of microcontroller and aurdino and i can complete the desired work before the time limit and minimum of your buget just

$250 USD på 10 dage

5,0

(4 anmeldelser)

3,3

@samiahmetjunaid

Hire the BEST forget the rest.

$1.300 USD på 35 dage

4,4

(3 anmeldelser)

3,0

@najamshah04

Hi there! Electrical engineer here, i am expert in programming, PCB designing and printing .etc, please send me details of your task to get professional work done!.I am pleased to offer high-quality, clear and concise work. You will find that every piece that I produce is well-organized and perfectly structured according to your need. I am a confident, passionate & a determined individual, I love to take initiatives & believe that creative thinking based on sound fundamentals is the prudent way to resolve problems. I can provide you all these things with unlimited revisions till the satisfactorily completion of project. come inbox to discus. Hoping for a kind and quick response. Thank you!

$277 USD på 1 dag

0,0

(0 anmeldelser)

2,0

@srivishnu2802

We can work like the milestones specified by you in the requirements but will take weeks of time to complete all the mile stones

$1.400 USD på 28 dage

0,0

(0 anmeldelser)

0,0

@YongD1Freelancer

PCB layout Expert and one associate, specialist in hardware programming well one year support for Design Factory Management updates the first batch productions

$555 USD på 10 dage

0,0

(0 anmeldelser)

0,0

@mg17

Hello, My name is Jochem, I’m a professional pcb designer with over 15 years of experience in engineering. I’m expert in developing IoT devices and connecting to the cloud and mobile apps. I’m familiar with the ESP32 I designed a prototype for a greenhouse thermostat. But for this project I would use the NRF52DK. If you are interested or have any questions please feel free to contact me Kind regards, Jochem Kroon

$555 USD på 35 dage