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Time Left: Less than 3 days
Hourly Rate: Not Sure   |  Duration: Not Sure  |  Posted: 7h, 57m ago  |  Ends: 2d, 16h  |   2 Proposals
The goal of this project will be to update a design of a PCBA for a 2500 mAh LiPo single battery power bank. PCBA specifications: Hi, we have not found a part number of the main IC. We are now choosing a provider to update this design to a new IC. We'd like the resulting design: - to reuse as much as possible from the existing design - to fully comply with this list of requirements: 1. Input: DC5V 1A, so that battery charges at 1Amp rate 2. Outputs: two independent outputs, DC5V 1A. Connection of an external device to one output automatically blocks the other output. 3. Built-in protections for input and outputs: 3.1. overvoltage 3.2. overcurrent 3.3. short circuit 4. Built-in protections for battery: 4.1. Overcharge 4.2. Overdischarge 4.3. Overcurrent 4.4. Overheating 5. Battery charging/discharging: standard 3.7V LiPo battery charging cycle, 2500 mAh battery (we will provide the samples) 6. Simple shake sensor: activates LED indication. Example:   [obscured]  /Electron...
Category: Electrical       
Preferred Location: North America, Western Europe, Eastern Europe

a****kov
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| a****kov
|    United States
Fixed Price: Less than $500   |  Posted: Jun 27, 2015  |  Ends: 1d, 10h  |   12 Proposals
This job is to write 10 articles, All articles must be 500-600 words. Review article have the same format with this article (  [obscured]  /cuisinart-electric-pressure-cooker-product-review-194137). I will pay $4-$6 for this article. If this works out well, I anticipate it turning into a long-term job (with potentially hundreds of more articles). Key requirements for this project: IMPORTANT: The articles MUST BE 100% UNIQUE, with good English grammar and spelling. Key qualifications: 1) Strong English writing skills. 2) Experience with SEO-writing ? In particular, you will need to write each article title in such a way that it is optimized for search engines (i.e. you should strategically select titles that contain phrases and keywords that receive at least some search volume from Google)
Category: Article Writing       

h****vin
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| h****vin
|    Vietnam
Hourly Rate: Not Sure   |  Duration: Not Sure  |  Posted: Jun 21, 2015  |  Ends: 2d, 23h  |   5 Proposals
Hi, looking to make a solar charger that would work for lightning cable iOS devices, the latest iPad being the largest device. Basically looking for a solar panel, that can draw enough power to charge an iPad when connected through USB. This will end up embeded in an end product, but if you can give me the basic specs, I can figure out how to fit it into the end product. Need some insight to solar cells, and technical requirements to sell such a device. I'll deal with apple and getting anything certified that I need to. As far as compensation goes, you tell me what you want and we'll go from there.
Category: Product Design       

E****ers
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| E****ers
|    United States
Fixed Price: Less than $500   |  Posted: Jun 21, 2015  |  Ends: 2d, 22h  |   23 Proposals
I am looking to turn an idea into a prototype. Implement the work described in the attached file. All materials and information will be provided.
Category: Electrical       

C****ote
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| C****ote
|    Austria
Fixed Price: Not Sure   |  Posted: Jun 20, 2015  |  Ends: 2d, 7h  |   6 Proposals
Need an experienced programmer who has previously worked with STM32F103 Cortex-M3 microcontrollers. Need to write a code to play the WAV files from SD card to DAC/PWM output. Target MCU: STM32F103C8T6 System Clock Freq: 168MHz Desired IDE: CooCox CiIDE SD Card Interface: Hardware SPI (1 data line bus is enough) SD file system: FAT32 The program has to read wav sound files from SD card and play them into internal DAC or output to PWM. The output mode can be selected by a jumper (DAC or PWM) The PWM frequency should be 328KHz, 9bit resolution. The Sound should be played in two modes, Normal mode and Split mode. The split mode means that the sound amplitudes higher than zero should be output on one DAC channel while amplitudes of lower level than zero should be played on second DAC channel. The same should be also in case of PWM. The modes should be able to select by jumpers. Totally there should be 4 modes Mode 1: DAC normal mode (1 channel DAC) Mode 2: DAC split mode (2 channels DAC) M...
Category: Electrical       

A****dil
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| A****dil
|    Armenia
Fixed Price: $500 - $1,000   |  Posted: Jun 20, 2015  |  Ends: 1d, 23h  |   7 Proposals
Input : a) 0 to 100A AC current b) 0 to 1000V AC Voltage c) 45 to 65Hz Frequency d) 4 channels for 4 to 20mA input e) 2 channels for 24V DC pulse input f) 4 channels for 24V DC relay output. g) 2 channels for 4-20mA Output Output : Display three lines current, three lines voltage, three lines power, frequency, 4 milli ampere channel output, 2 channels DC pulse output, USB port to read all outputs.
Category: Electrical       

t****dia
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| t****dia
Fixed Price: Not Sure   |  Posted: Jun 20, 2015  |  Ends: 1d, 16h  |   0 Proposals
I am looking for a freelancer who can do a simple measurement of the Total Harmonic Distortion for a Schneider Conext SW 4024 Inverter. This may be done on the 120V or the 230V version. Measurement needs to be made with a nonlinear load, more details will be provided to selected freelancer. You need to have a distortion analyzer as well as an oscilloscope available to bid on this job, and of course have access to this inverter too - at a friend's or colleague's place for example.
Category: Electrical       

D****Ram
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| D****Ram
|    India
Fixed Price: Less than $500   |  Posted: Jun 19, 2015  |  Ends: 1d, 9h  |   4 Proposals
My intent is to mimic this transmitter but improve on it a bit   [obscured]  /2009/06/command-transmitter-by-dave-martin.html?m=1 It would be nice to have band modules by that i mean in the schematic above the band is changed by L6 - L7 and C13-16 this would be nice to be able to just changer out a module for the and i want and then the crystal to get me on frequency the idea is in a emergency situation i want to be able to broadcast a audio file from a device into the transmitter via the shortwave band(s) this transmitter must have a low pass filter so any out of transmitted band harmonics are filtered out this filter must be modular and be swapable inline with the tx so when i change frequency i can change filters as well Transmitter must be capable of producing a minimum 25w output Transmitter must be build on a pcb (no bread board no dead bug no perfboard) This project includes you building a physical working prototype This project includes you designing the ...
Category: Electrical       

w****eed
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| w****eed
|    Canada
Fixed Price: $500 - $1,000   |  Posted: Jun 19, 2015  |  Ends: 1d, 9h  |   13 Proposals
I need to create a small electronic device that includes the following components: Bluetooth transmitter, rechargeable battery with recharge port, connected by wires to board, and a micro microphone connected by wire to the board. I know this can be made very small because the Bluetooth earpieces have these components and more. I have been trying to connect all of these components myself but have been unsuccessful because of my colossal lack of knowledge concerning most things electronic. The electronics of this device will be used to market a small medical device for health care providers. I would like to know cost to build one unit, I would also like to know if you have the ability to manufacture these devices in large quantities for marketing. Thank you, look forward to working with you.
Category: Electrical       

P****ell
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| P****ell
|    United States
Fixed Price: $1,000 - $5,000   |  Posted: Jun 19, 2015  |  Ends: 1d, 4h  |   11 Proposals
I need someone to create for me a phone case with an eink display similar to   [obscured]  / but with some notable differences.   [obscured]  /watch?v=wimGaHI957M. Person must have experience not only in product design but in electrical engineering; experience with manufacturing is a plus. Please give me a realistic timeline on the work and an idea for how you will deliver the final goods. NDA must be signed to work.
Category: Electrical       

h****eye
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| h****eye
|    Canada
Fixed Price: Not Sure   |  Posted: Jun 19, 2015  |  Ends: 1d, 1h  |   9 Proposals
we are looking for a bluetooth smartwatch/bracelet with microphone/speaker. It should look like e.g.   [obscured]  /product-detail/bluetooth-watch-bracelet-watch-wifi-bracelet_60165271648.html The smartwatch must have a button. Pressing that button must run an app on the smartphone and start streaming/recording audio to that app. All other functionality is unneccessary. We are looking for an offer of such a product. It can be an existing one. Also a prototype for a new product would be interesting (but including an offer for cost/item).
Category: Electrical       

s****tar
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| s****tar
|    Germany
Fixed Price: Less than $500   |  Posted: Jun 19, 2015  |  Ends: 19h, 11m  |   34 Proposals
We have a PCB file in gerber format, which has to be transfered into Altium. When this has been done, we are looking for someone that can make changes to this altium design (next job). The PCB has a STM processor, charging unit, MPR121 touch sensor, bluetooth, touch panel and some additional components. The board is part of a devices that sends and receives touch data over bluetooth and translates into motor control.
Category: Electrical       
Skills: Altium Designer, Electronics, gerber       

K****dam
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| K****dam
Fixed Price: Not Sure   |  Posted: Jun 18, 2015  |  Ends: 7h, 44m  |   7 Proposals
Hello ? We have a two phase project that requires an expert with a M2M device control over satellite experience/ background to design a detailed schematic to turn on/off existing simple piece of hardware (self-powered) as needed over a satellite constellation from a work station computer. This detailed schematic will need to show the end-to-end M2M solution and detailed diagrams of all components and their interaction. We will provide the simple schematic of the device that needs to be controlled/"power on/off" through an accessible wiring harness and/or inline power switch or micro-controller over and existing satellite constellation (Iridium/Inmarsat). The device is self-powered and has an existing tri-band antenna. (Avionics/Aerospace engineering background helpful but not necessary) Phase two is to build the prototype(s) and merge with said devices which can be used to demo to Avionics/Aerospace team on a desktop version or over Iridium SDK . We are receptive to h...
Category: Other - Engineering &...       
Preferred Location: North America, Western Europe, Eastern Europe, India/Southern Asia

T****oup
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| T****oup
|    United States
Hourly Rate: Not Sure   |  Duration: Not Sure  |  Posted: Jun 03, 2015  |  Ends: 10h, 22m  |   10 Proposals
Familiar MSP430 series or similar firmware development. Understand and can develop firmware update system Familiar with blue tooth low energy (BLE) firmware design.
Category: Electrical       
Preferred Location: United States

G****Pal
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| G****Pal
Hourly Rate: Not Sure   |  Duration: Not Sure  |  Posted: Jun 03, 2015  |  Ends: 7h, 4m  |   9 Proposals
We need one inventive engineer well-versed in solar technology who can take our ideas and add the solar components needed to energize them. These products are geared for general public, mostly farm-related and small but essential items. Compensation is part ownership in patent. We will be using crowd funding to finance the prototype. Our company will provide design, marketing, fund-raising, publicity and direction.
Category: Electrical       

C****ksU
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| C****ksU
|    United States
Fixed Price: Not Sure   |  Posted: Apr 04, 2015  |  Ends: 13h, 42m  |   7 Proposals
I would like to know if it's technically viable to create the prototype. Detailed diagrams, illustrations, and/or media are needed to demonstrate this invention can work in it's actual environment. Job Requirements: 1. Certified Electrical Engineer 2. Experience in designing prototypes with screen technology and multi-touch peripherals 3. Possibly use currently available components for construction 3. Sign a Non-Disclosure Agreement 4. Pay expectation for completing this Fixed-Priced Job
Category: Product Design       

R****rks
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| R****rks
|    Taiwan
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