Last seen: Apr 21, 2014 11:19 AM EDT
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Electronic and Electrical system designs

Username: EEmbedded

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Location: Colombo, Sri Lanka

Member since: July 2009



(14 reviews)

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My projects:

  • $444 USD
    Profile image for Seller cardcod


    Mar 14, 2014

    I have worked with other freelancers , but this guy is a real professional and an expert, I will work with this professional freelancer again.. Thank you.

    Project Description:I am looking for someone to design and build a stand alone device what will record key sequences on 4x4 matrice. Key sequences will be time stamp saved when is press enter key or after a period of times of inactivity...
  • $390.5 USD
    Profile image for Seller craves1


    Sep 28, 2013

    This was an Infrared to HID keyboard projectI got the Receiver design within hours after I hired him.We were able to debug the design and he wrote the firmware within one day of finishing the prototype. EEmbedded consistently was able to complete all tasks that were necessary to get the prototype working quickly and easily with only minor delays to re-write and test the code.The project was finished on budget and without any delays on EEnbedded’s part.I have been working with software and electronic engineers for more than 20 years and I find him to be just a good or better than the best. I have worked with some great engineers worldwide so that is saying a lot.I have already awarded him another project and will surely award more in the future.Great work!!!

    Project Description:Looking for a developer to write code for a RS232 to USB HID Keyboard. The Device will be designed around a low pin count Microchip Microprocessor. The input to this device will be infrared by way of a Infrared to serial receiver decoder micro...
  • £388 GBP
    Profile image for Seller WigglyAmps


    Sep 14, 2013

    Our first experience on Freelancer and very happy with the results. They actually *read* the requirements (unlike some bidders!) and delivered what we wanted before the deadline. Good communication and Language skills - would not hesitate to use again.

    Project Description:We require someone with experience of the Teensy 3 ( to build a simple, custom HID project. Requirements are: - Device presents itself as custom HID (Not fussed...
  • $250 USD
    Profile image for Seller jiggawatteng


    Mar 24, 2013

    Great work, good communication, worked well to overcome problems. will hire again!

    Project Description:I need a Rapid Fire assembly code written to use with a 14 pin PIC MCU and installed on an xbox 360 "Common Ground" controller. The code will have 7 Main modes with 18 Sub-modes total. This will only use buttons and connections already on the xbox controller...
  • [Sealed]
    Profile image for Seller banjotoenails

    banjotoenails [ Incomplete Report ]

    Feb 22, 2013

    This Freelancer had great communiction, but did no work. Many assurances were given from him but it only served to delay the project. Accurate requirements were given by me from the outset so the delay was not caused by requirement clarification. Simply put, he promised something, could not deliver, and drew out the project time significantly with false updates. Would not recommend.

    Project Description:I would like a 4 digit, LCD timer module with a magnetic reed switch. This module including batteries must be as cheap as possible. I require this design to be modified for a smaller LCD GDC0209. PCB will need redesign...
  • $70.55 USD
    Profile image for Seller chrisellwood


    Dec 11, 2011

    10 = Excellent. This guy is 10!

    Project Description:I am looking for a competent software / firmware developer who has good development experience to help me with the following... As shown in the picture below I have a basic interface board built upon the PIC18F4550...
  • $90 USD
    Profile image for Seller chrisellwood


    Dec 3, 2011

    Rating: 5.0/5.0

    Project Description:[Project Description hidden]
  • $- USD
    Profile image for Seller cleoglass

    cleoglass [ Incomplete Report ]

    Aug 26, 2011

    Eeprasad (the worker) agreed in their Worker Contract that if their project went into arbitration, they would respond to the arbitrator's questions fully and on a timely basis, or they would forfeit the arbitration. An arbitration occurred and eeprasad did not do this. All funds in escrow were returned to renting_goodcoders (the employer).

    Project Description:[Project Description hidden]
  • $133.2 USD
    Profile image for Seller reddy889


    Dec 14, 2010

    Rating: 5.0/5.0

    Project Description:[Project Description hidden]
  • $127.5 USD
    Profile image for Seller chrisellwood


    Dec 9, 2010

    Superb! Excellent Coder, thanks!

    Project Description:Please see pictures and files relating to this project at The PCB is a simple interface board that is designed to write hardware position data to Microsoft Flight Simulator X and also read data from the same application...
    EEmbedded has not completed any projects.
  • $300 USD In Progress

    I need a people counter tool prototype to be designed and manufactured.The aim of the tool is to count how many visitors visit a store and record this data over the web in a MYSQL database.- The tool should have 2 sensors to make sure, that bi-directional counting is available.(e.g. The data should be recorded in a MySQL database. Every entry should have a record: Incoming: timestamp;IN Outgoing: timestamp;OUTNo housing, no beautiful case is required, just really the frame wired, but working tool.Write in your application how you would connect the Arduino Board or the Raspberry (or why would you use just one of them), otherwise your application will be ignored.Battery or AC powered are both options. (Battery preferred for prototype)

  • $444 USD In Progress

    I need a LED controller that has 9 outputs. six of which are for controlling red, blue and green LED"s to create different colors. The other three will be for single white LEDs that can be adjusted to any level. The three white led output must have independent memory for brightness levels and return to the last state when power is applied. The two color changing channel should also have independent memory so they also returned to the color they were adjusted to last.The dimming level for the white LED"s should be more than 16 steps.The color channels should also dim in a minimum of 16 stepsThe color of the 2 color changing channels should be adjusted by independent buttons on a remote control. There are also 4 keys per color changing channels that are memories for those channels that will return to the preset channels. The white LED channels will have three button each that will return them to three different brightness preset levels. These brightness levels are set into memory by a store key that is pressed and held until the LED on that channel flashes then the button to store the level in is pushed.There will also be 2 flashing rates for each channel ( 2 color changing channels and 3 white LED channels) controlled by independent buttons on the remote control. This will need 6 buttons to accomplish.Layout and SoftwareThe micro this should be designed around will be a Microchip part.The memory can be internal or externalA schematic is required so we can make the PCBThe firmware source code should be well documented and complied with the MPLAB from microchip. Remote controlNo need to design a remote control.The LED micro will be controlled be a 8 pin serial micro from Microchip. It will take care of all the remote control button decoding and present the key codes to the LED controller Micro as 4 byte ASCII data starting with the $.The data will be defined as a "new key press" and a "repeats same key press" and "key number". The LED controller firmware must have a mapping table where we can decide what remote control code controls what LED function.We have many designs with this layout already so it is not complicated. We just change the key mapping and re-compile the code then program the micro. The Micro for the controller should be a Flash type for in-circuit programming.There should be a port to program the micro using MPLAB and a IDC2 programmer or similar. LED drive circuit and voltage.The circuit will be 12 volts with a 5 volt regulator for the micros. We can finish the design from the outputs of the LED controller"s Microprocessor.

  • $90 USD In Progress

    Xbee Sensor Project The Xbee will communicate with my pc using a Serial (RS232) or USB port. It is necessary to design this hardware ( I know that maybe Arduino can do this or some other kit). I need to use 2 Xbee to communicate with each other in order to send and receive info on some sensors that could be used with home automation. The idea is that the temperature sensor detects if it"s necessary to turn on the A/C or not and then it turns it ON and when not necessary any more, it turns the A/C OFF. Both Xbees need to receive AND send signals to be programmed and to program the other. For example, I want to set new temperature parameters for the sensor to turn ON the air: Instead of 30 Celsius, it should turn the A/C when the temperature reaches 25. I also need to read from the other Xbee the temperature on that exactly moment. ## DeliverablesIt is also necessary to build and test it if it works. Please include all harware schematics and necessary components.

  • $5555 USD 4 days ago

    [This is a Private Project. You must be logged in to view the Project Description]

  • $222 USD 4 days ago

    ... shown in the Link.pdf Hello,we need someone who can develop a product like this (in the Link.pdf)!Hardware should be developed! Software engineer is already hired and you should work together with himPlease ask me if you got questions!ThanksRalf

  • $555 USD 4 days ago

    Need to program DDS (AD9834) signal generator , from a microcontroller (PIC16F877A) using 3-SPI interface

  • $277 USD 5 days ago

    using arduino send sensors data via Bluetooth into C# app

  • €1250 EUR 8 days ago

    We are a startup company an looking for a professional to develop a GPS tracking device for us.The features of the GPS tracking device should be as following:1. live tracking2. GPRS data transmission (Device to Server, from Server to Device)3. for iPhone and Android

  • $155 USD 8 days ago

    design and manafacture a electronic componment from scratch

  • £388 GBP 8 days ago

    Hi,Thanks for looking! I"m not proficient with all of the terms used in this field so please be patient while I describe what I need. I need somebody who is efficient with C programming or better yet, someone who has experience with Arduino libraries to program a Arduino USB micro-controller with an lcd interface attached. The controller will output a 4 digit code to a text file (or input field) on the computer. It will also output this same code simultaneously to an lcd screen that"s attached to the micro-controller itself. The controller will start at 0000 and run until it reaches 9999. There are a few other simple conditions that need to be implemented such as:Hit enter after entering the 4 digit code. Wait 16 seconds until outputting the next code.Begin automatically a short while after it has been plugged in to the computer.I have the majority of the code ready for a teensy 3.0 but need somebody to tweak it so that we can output it to the lcd screen.I will purchase the Arduino and lcd attachment after consulting you and seeking your advice on the best one to purchase and await the code to implement it. If it"s more suitable for me to send you the device, then I may be willing to do that too. Thanks for viewing.

  • $166 USD 10 days ago

    All,I was wondering if you would be able to design a schematic for the following circuit description:I have a system with three buttons (1 - Power, 2 - Mode, 3 - Capture). I want the following to happen:After the momentary Power button is pressed on, wait 8 seconds and then trigger the momentary Mode button via a pulse (the pulse should be between 0.5 seconds and 1.5 seconds in length). Then wait 1-2 seconds and trigger the momentary Capture button via a pulse (the pulse should be between 0.5 seconds and 1.5 seconds in length).Here"s a summary of what I"m looking for:-Current circuit has 3 momentary buttons, device is charged by USB-The three buttons are Power, Mode, and Capture-Momentary Power button is depressed-8 seconds later, a pulse (between 0.5 and 1.5 seconds long) is sent to the momentary Mode button-2 seconds later, a pulse (between 0.5 and 1.5 seconds long) is sent to the momentary Capture buttonAttached is a picture of the three buttons that I will be extending. I assume 555 timers will be needed; keep in mind that I"m trying to make the circuit as physically small as possible.Regards,Jason Morriss

  • $222 USD 13 days ago

    I have an assembly program that was originally written for the PIC16F690. It takes serial data in, process a specific number of bytes, and convert it to an I2C stream to a Master. I need someone to update this code to a PIC18F that has more RAM and is much faster, and in the mean time, process three times more bytes.

  • €1666 EUR 15 days ago

    when the car starts running, the client receives a confirmation SMS that it is running now. If this is illegal operation or any intruders try to run the car, the owner can send SMS to switch off the car. Afterwards, the system will check the mobile number for received message, to confirm that the phone number could access the security system; if the phone number is legal the system will turn off the car. If the owner needs to track the vehicle, he/she have to send SMS contains special code, after that he/she will receive a SMS containing the GPS coordinates of the car, the SMS updating its content every predetermined period. Also the car owner can connect another GSM modem with laptop to track the vehicle immediately using Google Earth. The implemented tracking and security system can be used to monitor various parameters related to safety; antitheft, emergency services and engine stall

  • $1222 AUD 17 days ago

    wireless communication between arduino uno circut (two arduino connected together via serial communication) and android application. i want it two way connction, the application conrol the arduino circute

  • $1666 USD 20 days ago

    I need someone to build a small keylogger with the smallest Qfp preferably Atmel with UART, RTC, and spi interface that can with about 2m + of memory with date and time stamp I need to be able to retrieve information via USB or hyper terminal it has to be encrypted with password have it"s own coin cell battery and I need to be able to hook up my own custom matrix membrane to it with format of (12345678*#abcdefg)

  • $833 AUD 20 days ago

    Counter circuit with live calculation.I require a circuit which allows two 7 segment displays (display1 and display2) to be individually set to any number between 0 and 9999. A third display (display3) is to then calculate ((display1 * 100) / display2). The user will then be able to manually count display 1 up or down by either units of 1, 5 or 10 base on their selection.Display 1’s value will constantly change based on the users input and display 3 should recalculate to reflect this.Please see the image for a visual understanding of my requirements and ask any questions you may have.I would suggest designing this circuit on two separate circuit boards, one for the user panel and one for the display panel.Additional Requirements•Circuit needs to be Battery powered – Battery size and type to suit circuit design.•If possible, design without the need of a programming logic device (microcontroller or processor). However the cheapest and most reliable method should be used.•Once you have been paid in full, the circuit design will belong 100% to myself unless other agreements have been made.Please state what you will deliver, below are my suggestions.Deliverables:•Schematic Circuit Diagram.•Circuit board layout.•List of all materials, parts ect.. with links to item location on•Design Documentation.•Simulation of project in video (is possible).•Anything else you are willing to deliver. I have attached a document with some of the parts I consider using. I would prefer all parts are sourced from message me with your understanding of the project, what you will deliver and an estimated time to complete the project.

  • €1250 EUR 20 days ago

    Build a SCD ( Smart Card Detective ) ;The whole project and informations can be downloaded from : .

  • $155 USD 20 days ago

    we need to develop program with pic12615. Our circuit diagram and functionality are ready

  • $555 USD 26 days ago

    Control home appliances using mobile from any part of the world.

  • $250 CAD Mar 17, 2014

    Hi,We are looking for a programmer familiar with the PIC16F690. Programer with experience only.

  • $333 USD Mar 9, 2014

    The project is based on Arduino, Php and Mysql. I’m looking for an experienced programmer with knowledge of C/Java programming for Arduino (Uon) and/or (Mega) and the Ethernet Shield. I just need to do the following functions with Arduino and PHP components:_Arduino sketch to write (via PHP) to MySql the values of digital and analog pins with the date/time stamp (using Ethernet shield)_write pin (sensor) data into on-board (Ethernet Shield) SD card in *.csv format (text file)_ PHP website to activate/deactivate (send values) to the adruino pins (radio buttons on/off for digital pins, and value or a slider for analog pins) .Libraries for Ethernet shield and SD card are available from Arduino. You do have access to the components to test your work. For more info please send PM.

  • $404 USD Jan 15, 2014

    Hi,I want to develop a system to send info from Android APP, to a microcontroller PIC. I want to move a motor if there is some conditions.I need to know if you can do it and the delivery time.Best regards,Roberto

  • R16578 ZAR Nov 14, 2013

    This project relates to a data logger for a hybrid drive test vehicle. It is an automotive (truck or car) “on the road” data logger project using a pc (laptop), labview, arduino and arduino shields and readily available robotic boards only.The project will be divided into 4 phases and will be paid as such. The deliverables are the labview VI’s, connection diagrams and the arduino sketches. The project can be done with most of the coding on the arduino using projects listed per section and just the results sent to labview but preference will be given to a project that programs the arduino FROM the labview VIThe key evaluation points are: 1) labview plus 2) arduino mega and 3)standard shields pololu or adafruit or sparkfun but preference will be for shields from ( The local distributor in my country)The design is not limited to a single arduino unit, but there may be speed and timing issues, but then the communications between the boards must be included in the projectPhase 1:Basic vehicle tractive forces and speeds Measure three shafts speeds, vehicle IMU data and sned to data card and display on labview in real timea)There are three shafts (-6000 to +6000rpm), we need to direction and speed. The suggested method is quadrature encoders, but open to suggestions. Suggested method measure rpm speed and direction of 3 shafts. 3 quadrature encoders as per LIFA. And probably https://decibel, vehicle IMU data . a example is And another example is at It is only required to show in realtime the vehicles readouts from the IMU unit. The plotting and link to google maps must be demonstrated c)all data to be logged at least at 5 hz, preferably 10hz write shaft speeds, shaft direction and all IMU to csv file on arduino shield but ALSO display all the speeds ( gauges and numeric suggested ) and all IMU data ( bar graphs and numeric suggested in labview in realtime)Phase 2: measure other devices: d)add 10 analog 0-10v signalse)add 10 digital signalsf)add accurate timing of the fuel inject operation time. This will require a highly accurate timing library to measure the time of operation of fuel injectors. It could be a voltage or a current based system, but a hall effect system is preferred to avoid braking into the vehicles wiring. htttp:// a real time clock to the systemPhase 3 independent reading of the OBD11 bus capability and CAN busThere are many standard arduino projects. One must be added to the data logging system. There are many can bus implementations, one must be added to the systemPhase 4 touch screen display for in vechicle graphicsA 4dsystems touch screen display must be added into the system for real time display of selected vehicle parameters

    EEmbedded does not have any open projects.
    EEmbedded does not have any work in progress.
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USB HID Controller

Sep 2013 - Sep 2013 (1 month)


USB HID using Teensy 3 development tool


BSc (Eng) Honors

University of Moratuwa






Knowledge on heart patients through stethoscopic cardiac murmur identification for E-healthcare


Cardiac murmurs are the sounds produced by the abnormal passage of the blood flow inside the heart due to the diseased valves or tissues. Identifying the type of the murmur can diagnose the cardiac pathology related to that particular murmur. This paper describes a researched digital stethoscope that can be used as a stethoscope as well as a murmur identification device. To capture the heart beat, a chest piece of a traditional stethoscope is used with a condenser microphone attachment. Then the signal is a

Auscultation based stethoscopic diagnostic device for cardiac murmur identification


In a healthy heart, there is no any abnormal blood flow takes place inside, in addition to the usual blood circulating pattern. However when the valves or tissues inside the heart are in diseased conditions, this usual blood flow pattern gets changed. As a result, abnormal sounds are produced with the normal heart beat sound. These abnormal sounds are known as cardiac murmurs. By identifying the murmur type doctors can diagnose the cardiac pathology related to that particular murmur type. This paper describ