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Fixed Price: $1,000 - $5,000   |  Posted: 13h, 56m ago  |  Ends: 14d, 10h  |   4 Proposals
The task is simple, recreate the teensy 3.1 with the same number of pins and specs, just make it as thin as possible using thinner pcb, chips on the back, etc. Bidders must provide evidence that they have experience designing and producing electrical chips. We need someone that can take this project through to a working prototype. If after thorough testing we agree that it performs to our satisfaction, we will look to produce the chips in some quantity but what you should bid for is just for building us a prototype.
Category: Electrical       

h****eye
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| h****eye
|    Canada
Hourly Rate: Not Sure   |  Duration: Not Sure  |  Posted: Jul 03, 2015  |  Ends: 13d, 19h  |   8 Proposals
We have an ongoing requirement for the services of a control systems engineer who can assist with the creation of front end hardware design for the purposes of quotation.
Category: Electrical       

K****lia
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| K****lia
|    Australia
Fixed Price: Not Sure   |  Posted: Jul 03, 2015  |  Ends: 13d, 13h  |   14 Proposals
I need to build a control device for something I'm building. I need to control a stepper motor to feed a wire, and then I need a 1-3 second delay, and then move a separate servo motor, to control a lever. I will build all the other components, I just need someone to provide me with all the electronic components (Arduino, Button, small readout Screen, 1 Stepper, 1 servo motor etc...). Here is what I would ideally like: 1. 2 button control (with a display) - 1st button will start the action (GO) - 2nd button will control count (So I would like to repeat the Go function 1 - 9 times) 2. So when the User presses the GO button, the Stepper motor will feed Slowly lets 360 Deg (I will need to able to change this in the code, because I need to specify the length and speed of the feed, which I need to measure after installation) - This motor dosn't have to be strong at all, I'm just feeding a small wire with this. 3 Once the stepper finishes its move I would like 1-3 second delay...
Category: Electrical       

d****hbt
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| d****hbt
|    United States
Hourly Rate: Not Sure   |  Duration: Not Sure  |  Posted: Jul 03, 2015  |  Ends: 23h, 33m  |   8 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, Eastern Asia

a****kov
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| a****kov
|    United States
Fixed Price: $1,000 - $5,000   |  Posted: Jul 02, 2015  |  Ends: 4d, 11h  |   7 Proposals
We are looking for a talented FPGA programmer to help us implement a low noise (<10nV/(rootHz)) lock-in amplifier for heterodyne detection of sideband signals. Carrier frequencies range from 0.3 to 1.5MHz. The lock-in amplifier must have the ability to generate signals at specified frequencies and demodulate signals at the sum or difference of two frequencies (FM/heterodyne detection). Your job will be to develop a working prototype that does the following: 1) Takes in signals via a high speed, 16bit ADC 2) Generates a sine wave with programmable amplitude (ranging from 0 to 5V) and frequency, f2 = (1 to 1000Hz) 3) Demodulates the signals at two frequencies f1+f2, f1+2f2. f1 is determined from the DAC input. f2 is the frequency generated in step #2. 4) Outputs the RMS amplitude of the two demodulated signals via a low noise, 16bit DAC. We have an ADC and FPGA eval board already chosen, part #'s AD9268 and HSC-ADC-EVALCZ from Analog. You will need to help us choose the DAC and fi...
Category: Electrical       

N****lIR
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| N****lIR
|    United States
Hourly Rate: $20 - $30 / hr   |  Duration: 1-3 months  |  Posted: Jul 01, 2015  |  Ends: 14d, 12h  |   4 Proposals
Hi there, I am going do design a product that is based on Light Coded Transmission. Right now I am blank. I have little bit info regarding this. I am talking about " LiFi ". I need a person who can guide me on this. I need a proper working prototype and later we will work on manufacturing process. Please mention your approach and tell me exact time to finish this. Is this possible or not ? Best Regards
Category: Electrical       

E****Ali
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| E****Ali
|    Pakistan
Fixed Price: Less than $500   |  Posted: Jun 30, 2015  |  Ends: 10d, 16h  |   9 Proposals
I require a simple Psoc design (cypress chip), which includes: -filter -amplifier -automated gain controller -peak detector. More detail will be provided to negotiate the task at hand.
Category: Electrical       

a****821
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| a****821
|    Australia
Hourly Rate: Not Sure   |  Duration: Not Sure  |  Posted: Jun 30, 2015  |  Ends: 10d, 4h  |   14 Proposals
Looking for a freelancer/company to help us design a circuit for a physical game for kids, involving lasers, mirrors and light sensors. The game is a sort of puzzle where the player needs to make a laser beam reach a light sensor by moving small mirrors to reflect the light. It needs to be hooked to a raspberry pi or alike to control the game logic. The game size is approximatively 4m x 2.5m x 0.5m. You will help us translate our concept into a working installation, define what is possible or not, select the components and design the circuit. We will also need wiring diagrams and specific instructions to provide our local contractor. Optionally, you could also provide us with some basic code to run the circuit.
Category: Electrical       

t****rbg
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| t****rbg
|    Qatar
Fixed Price: Less than $500   |  Posted: Jun 29, 2015  |  Ends: 9d, 15h  |   12 Proposals
control relais with arduio gprs module via website control relais with arduio gprs module via website i must be able to control the diffrent relais via a webpage on my server . i also easly must be able to add ar remove a device i bought this gsm module sim900a mini v3.8.2   [obscured]  /item/New-SIM900A-V4-0-Kit-Wireless-Extension-Module-GSM-GPRS-Board-Antenna-Tested-YKS/32238571507.html you also need to guide me to use it
Category: Electrical       
Skills: Arduino       

o****dun
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| o****dun
|    Belgium
Fixed Price: Not Sure   |  Posted: Jun 27, 2015  |  Ends: 7d, 11h  |   24 Proposals
We are looking for an embedded designer that has proficiency integrating Xbee with a Pic or Micro for a wireless sensor project. Experience with Digi Xbee gateway is highly preferred as we will use the Digi gateway for integrating and connecting with the remote sensors.
Category: Electrical       
Skills: PCB Design, Embedded System, xbee       

s****rks
 [?]
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| s****rks
|    United States
Fixed Price: About $20   |  Posted: Jun 27, 2015  |  Ends: 7d, 0h  |   7 Proposals
i need someone to write a code for sawtooth, reverse sawtooth and noise waveforms using an arduino uno with a frequency between 1hz to 500hz
Category: Electrical       
Skills: Arduino       

r****m32
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| r****m32
|    United States
Fixed Price: $1,000 - $5,000   |  Posted: Jun 26, 2015  |  Ends: 21d, 12h  |   23 Proposals
Short description: In this system, each table in the restaurant gets a battery powered wireless calling device with buttons. When pressed, this calling device sends a wireless zigbee or generic 2.4GHz message that will be received by one or more of the base stations of the system, which are based on Raspberry PI A+. The master base station memorizes the call status for each transmitter so that said information can later be polled over wifi and displayed by apps run in smartphones worn by the waiters. The apps for said smartphones are developed in a separate project ? you don't have to develop them. Deliverables for this project: ? For the calling device; scematics, PCB layout, MCU firmware ? For the Raspberry base station; software (including installer script that makes the software start upon boot) All software must be delivered with source code, and all source code must be professionally written and well documented in English. Suggested milestones (open to discussion before proje...
Category: Electrical       
Preferred Location: Eastern Europe, India/Southern Asia, Eastern Asia

I****tor
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| I****tor
|    Sweden
Fixed Price: $1,000 or less   |  Posted: Jun 25, 2015  |  Ends: 5d, 17h  |   26 Proposals
We need to have 3 different circuit boards manufactured. All of them will be less than 1.5 square inches. PCBs are currently being designed and should be done next week. Parts for each board are estimate at $10 per board from mouser. Most parts will need to be surface soldered on.
Category: Electrical       
Skills: Integrated Circuits, Circuit Assembly       

d****ion
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| d****ion
|    United States
Fixed Price: Less than $500   |  Posted: Jun 25, 2015  |  Ends: 5d, 14h  |   27 Proposals
Requires on off switch or method for going into sleep mode. The circuit board and components need to be as small as possible.
Category: Electrical       

s****ell
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| s****ell
|    United States
Fixed Price: Not Sure   |  Posted: Jun 25, 2015  |  Ends: 5d, 11h  |   14 Proposals
design is already made in proteus 8, only two things need getting sorted Move switch 1 inch below, move 5 pins header to further side
Category: Electrical       

B****rat
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| B****rat
|    United Kingdom
Fixed Price: $50 - $150   |  Posted: Jun 24, 2015  |  Ends: 4d, 20h  |   13 Proposals
Need to design an Ultrasonic motion sensor and notfyer to be installed in the wheel arches of a car. Need the design to be able to build the unit myself. This project is to avoid parking tickets my creating notification when a parking officer marks my car tyres with chalk. When the parking officer moved their hand under the wheel arch the movement will be detected and I will be notified by text, email or key fob beeper. ( Range required approx 500m and within a building) The sensor could be mounted under the wheel arches ( the 2 front) or on the body of the car above the wheel arches. Ideally the components to build the project will be less that $250 and be available from online sellers. I imagine Arduino or rasberry pi will be the best options for a controller. Ideally the unit will be battery powered so I dont have to wire it into the car. With the bulk of the unit being attached to the dash an an on off switch so I can arm the unit when I get out of the car. Ideally the plans ...
Category: Electrical       
Skills: Electrical Engineering, Electronics       

m****b33
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| m****b33
|    Australia
Fixed Price: Less than $500   |  Posted: Jun 24, 2015  |  Ends: 4d, 14h  |   19 Proposals
Hi... please see attached document. This is for an ultrasonic sensor firmware design project. Thanks
Category: Electrical       

a****ani
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| a****ani
|    United States
Fixed Price: About $20   |  Posted: Jun 24, 2015  |  Ends: 4d, 12h  |   5 Proposals
I would like you to use a tpa3116d 50w+50w stereo amplifer and give me the results like 1. analysis of power efficiency a. open input + 8 ohm output load b. closed circuit + open output c. analysis of power efficiency 2.connect signal generator to amplifier at 8 ohm load a. use oscilloscope to analyse input signal vs output b. drive at max power 50 watts and provide analysis c. find distortion.
Category: Electrical       

r****m32
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| r****m32
|    United States
Hourly Rate: Not Sure   |  Duration: Not Sure  |  Posted: Jun 24, 2015  |  Ends: 4d, 4h  |   18 Proposals
We are currently working on a PCB with a 3G module, ARM processor, DC/DC and some other parts. From time to time the 3G module or uC stop responding - the 3G module usually burns up and some of the pins of the uC burn as well. Although we have a great engineer working on the project, we'd like to have a fresh look from an experienced engineer that may think of something we've missed. We will of course give more information, the schematics are in Altium.
Category: Electrical       
Skills: Altium Designer, Electrical Engineering       

y****ivb
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| y****ivb
|    Israel
Fixed Price: Not Sure   |  Posted: Jun 23, 2015  |  Ends: 3d, 10h  |   7 Proposals
Hi, we want to use an IR sensor for a medical application (temperature between 25-45 C). We're interested only in the temperature change of the target (we're not interested in the absolute temperature itself). We would like to know whether there is any adaptation / optimization we can apply to the camera / readout circuit in order to improve its temperature difference accuracy? (compared to the usual case where the circuit is optimized to output absolute temperature, and then we derive the images, frame by frame, to obtain the change in temperature). I need you to support the solution with a reference and/or a calculation that would show the expected improvement in performance due to the optimization for temperature change (compared to the usual systems that are optimized for measuring absolute temperature). Best regards, Gil
Category: Electrical       

g****123
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| g****123
|    Israel
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