Save this Search
     
Sort by:
  • Posted Date
Posted: Within 3 days
Fixed Price: Not Sure   |  Posted: 3h, 0m ago  |  Ends: 14d, 20h  |   0 Proposals
We are looking for someone to design a simple satellite receiver circuit. This would be used for obtaining audio only from FTA satellite transmissions. The output from the LNB would connect to this circuit and the output from the circuit would be a two channel analog audio signal for passing to an amplifier. The circuit would hence include satellite tuner, qpsk demodulator, and mpeg-ts decoder. Selection of the desired frequency would be via microprocessor. The deliverables would be: - A schematic of the circuit. - C++ program for controlling the circuit for the specified microprocessor.
Category: Electrical       

Y****ber
 [?]
Sign in to view client's details.
| Y****ber
|    South Africa
Fixed Price: $1,000 - $5,000   |  Posted: 20h, 28m ago  |  Ends: 14d, 3h  |   9 Proposals
# Summary We are looking for the design of a small-sized battery management system for Lithium Polymer batteries. # Description The batteries are integrated into several systems used in agricultural and semi-industrial environments which means that customers expect the equipment to be very easy to use. Currently, batteries intended for remotely controlled vehicles are used which has the advantage of having a high power to weight ratio but the downside of being cumbersome to use. # Requirements Thus, in the final design of this job we are looking for the following: * Automatic balancing of a 6S LiPo battery pack while charging * Status reporting on: * Current state of charge (Fuel Gauge) * Current flow * Voltages of individual cells * Number of charges / discharges * Health Monitoring These functions should be integrated into a small & lightweight PCB that can be added to a pre-existing LiPo battery pack.
Category: Electrical       
Skills: Electrical Engineering, PCB Design       
Preferred Location: Western Europe, Eastern Europe

i****mbh
 [?]
Sign in to view client's details.
| i****mbh
|    Germany
Fixed Price: Less than $500   |  Posted: 21h, 8m ago  |  Ends: 14d, 2h  |   6 Proposals
Hi, I need someone who is an expert with solar panels and has a fantastic understanding of all of the solar panels that are on the market. I am looking to put solar panels onto a small vehicle tracker. I am expecting that these devices will receive 1-2 hours of daylight per day and 3 hours of low/ artificial light per day. I am trying to minimize the $/watt of the panels. One important limitation is that all of these panels must fit onto a 13 square inch surface area or about the size of an iphone 6. Thanks!
Category: Electrical       

c****t06
 [?]
Sign in to view client's details.
| c****t06
|    United States
Fixed Price: Less than $500   |  Posted: May 29, 2015  |  Ends: 13d, 22h  |   2 Proposals
I want to interface 40 Kg Load cell interfacing with Arduino for 1 gram accuracy.Please send your proposal with detailed explanation about this project. Load cell: CZL 601,Precision : 0.02
Category: Electrical       

S****ies
 [?]
Sign in to view client's details.
| S****ies
|    India
Fixed Price: Not Sure   |  Posted: May 29, 2015  |  Ends: 13d, 18h  |   5 Proposals
AIM - To make circuit using sonar(distance sensor) as input which will be deployed in fast moving vehicle and to take output in form of vibration and display Objective - Sensors should be sensitive with range of .1m to 3 m. Need to know the options with respect to quality and cost Circuit should be designed with input from sonar and output as vibration(closer object gets, more vibrant it should become), and color changing LED (changing color from red to yellow to green) The power to be supported by solar films as well from external battery. The communication should be wireless for LED display as well for vibration module if possible Kindly let me know if more details are required. Thanks and Best Regards
Category: Electrical       
Skills: Integrated Circuits, Electronics       

N****nGR
 [?]
Sign in to view client's details.
| N****nGR
|    India
Fixed Price: $50 - $80   |  Posted: May 29, 2015  |  Ends: 18h, 4m  |   5 Proposals
need expert in math - communication engineer in order to derive some formulas more details as in attached file.
Category: Electrical       

m****lab
 [?]
Sign in to view client's details.
| m****lab
|    Jordan
Fixed Price: Less than $500   |  Posted: May 28, 2015  |  Ends: 13d, 7h  |   5 Proposals
i need a complete vedio tutorial with examples of how to use STM32 nucleo F411RE with sensor shield to and an open source compiler to build the following: 1- RTOS concepts and overall explanation explained for first time user with small embedded system back ground. 2- Setup, IDE ,library and compilation instruction 3- example: 3 threads for LED with full explanation 4- Example: multi threads for thread1: Buzzer song thread2: two dc motor with encoders that turns 10 turns, then stops, 5 then stops, then keep repeating. 5- Example : thread1: Stepper motors controlled by 2 buttons for up/down direction control (half rotation per press) thread2: 2 servo motors controlled by 2 IR sensors thread3: RTC serial printing current time on terminal. 6- other important examples Important notes: * All vedios should be private and in english. * All documents should be in .doc formal * money will be released after making sure all information given is complete and correct. * i will a...
Category: Electrical       
Skills: Electronics, Embedded Systems, Robotics, RTOS       

K****RDA
 [?]
Sign in to view client's details.
| K****RDA
|    Kuwait
Fixed Price: Less than $500   |  Posted: May 28, 2015  |  Ends: 13d, 0h  |   6 Proposals
Two boards. I require a board to interface to HopeRF RFM95W. The antenna needs to be small chip antenna. The board needs to be compact. The second board requires is based loosely on the Mediatek Linkit Assist 2502. The board design requires only the processor and the GPS. Both jobs should be easy for someone that has RF experience and board design. Both boards need to be tested to proof that it is working. Both boards need to be designed in Altium.
Category: Electrical       

g****010
 [?]
Sign in to view client's details.
| g****010
|    New Zealand
Fixed Price: $1,000 - $5,000   |  Posted: May 28, 2015  |  Ends: 12d, 15h  |   4 Proposals
Urgently need a highly motivated, intelligent, flexible freelancer SCADA/Power control systems researcher. Who can carry out research on SCADA vulnerability. he/she must have the following traits: 1:- Strong Programming Capability 2:-Strong Mathematical Background 3:-Strong Research Background (highly desired)
Category: Electrical       

j****113
 [?]
Sign in to view client's details.
| j****113
|    Pakistan
Fixed Price: Not Sure   |  Posted: May 27, 2015  |  Ends: 12d, 14h  |   13 Proposals
Research firm possess a design for a voltage controlled mosfet switch. We seek an experienced subcontractor to receive our build package (schematic, parts list and component connection paths) to produce a professional quality PCB complete with the working and tested circuit for delivery to us. Job includes: a) produce a PCB layout based on a circuit schematic provided by Research firm. The circuit has less than 25 components - all components are through hole style. See attached schematic, minus part numbers. b) Order parts to populate the PCB based on parts list provided by Research firm. c) Assemble, solder and test the populated PCB to assure proper on/off function. This voltage controlled mosfet switch turns on at 550vdc and off at 220vdc. Applicants responding to this job offer must have a power supply capable of operating at these voltages in order to test functionality of the circuit. If this 1st job experience goes well, there are other opportunities which may be discussed....
Category: Electrical       
Preferred Location: United States

I****ing
 [?]
Sign in to view client's details.
| I****ing
|    United States
Fixed Price: Not Sure   |  Posted: May 27, 2015  |  Ends: 27d, 2h  |   2 Proposals
Have basic design concept for a product that will make animal waste removal more efficient, but need specifics as far as size of components accompanied by images, and possible materials/tooling ideas. Also need to figure out a way of powering the apparatus. Familiarity with the vacuum industry would be useful but not required. Must be willing to sign NDA.
Category: Electrical       

l****mer
 [?]
Sign in to view client's details.
| l****mer
|    United States
Symbol Key
Payment method not yet verified
Payment verified
Purchased $1-$500
Purchased $500-$5,000
Purchased more than $5,000
You have already submitted a
proposal to this job