Last seen: Aug 01, 2014 5:35 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



(15 reviews)

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1 user has recommended this freelancer.

My projects:

  • $555.00 USD
    Profile image for Seller collavomirco


    23 days ago

    Very good communication and cooperation, he is open to requests and was very flexible to my needs. Good knowledge. I recommend this person.

    Project Description:I would like to update the USB bootloader I actually use (DIOLAN) on my project with PIC18F4550 to work with more recent Operative Sistems like Windows 7 , Windows 8 and if possible also more than these,...
  • $444.00 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...
  • $390.50 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...
  • £388.00 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...
  • $250.00 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...
  • $90.00 USD
    Profile image for Seller chrisellwood


    Dec 3, 2011

    Rating: 5.0/5.0

    Project Description:[Project Description hidden]
  • $0.00 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]
  • $133.20 USD
    Profile image for Seller reddy889


    Dec 14, 2010

    Rating: 5.0/5.0

    Project Description:[Project Description hidden]
    EEmbedded has not completed any projects.
  • $1666 USD In Progress

    We are looking for a GSM expert experienced with machine-to-machine technology. We are looking to incorporate one simple sensor per unit (ie. an accelerometer, PIR sensor, pressure sensor, and/or a manual switch) We have a prototype. You will re-write the code to be production ready. Project deliverables include verified functionality of a unit and materials for PCB manufacturing (gerber files, BOM, etc..). Please respond so we may evaluate your experience. We also want you to explain what you think a reasonable budget and timeline is. We will pay a bonus for completion by August 15th.

  • [Sealed] In Progress

    Background InformationPreviously we had another person building these portable incubators for us that was a retired electrical engineer. He suddenly passed away and we have been unable to get any of the intellectual property concerning the incubators from the estate While we still have many working units that are still operational we do know in the future that we will eventually need more units therefore we are embarking on this project to design our own incubator with help from some talented individual or team from Freelancer. Initial Requirements for Version 3Here is what we are trying to achieve:PCB should not be bulky or interfere with portability of the unitPower Source: (2) 9 volt alkaline batteriesSome kind of on/off switchVolume of Water to be Heated: 100 mlWater Temperature Starting Point: 80 °FOptimal Temperature Point: 98.6 °FOptimal Temperature Range 95 to 99 °FTime at Optimal Temp: 3.33 Hours Other Notes: Liquid should never go over 100 °F and once it reaches 95 °F it should not deviate below that temperature.The basic parts consist of the following: 1 PVC bag1 metal sensor probe that is inserted in the bag.1 sensor that is inserted in the probe and connected to a controller board.1 flexible heater that fits under the bag and is connected to the controller board2 9 volt battery leads that is connected to the controller board.Software should be written to keep the temperature at the desired range.**** IMPORTANT***Please read the PDF file for more complete information.

  • $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.

  • $1111 USD Today

    Hi, We are a startup of an idea for designing a device for herbal vaporization, we need electronic design with all the semiconductors that a herbal vaporization needs. Please contact us for more information.Thanks.

  • [Sealed] Today

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  • £150 GBP 6 days ago

    See PDF attached. I require a Instrumentation and control Engineer or electrical engineer. To specify parts and create a diagram of the control box. All details are attached. Prior to awarding you must explain to me that you fully understand the requirement, and that you have the experience to do this.

  • [Sealed] 8 days ago

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  • €555 EUR 8 days ago

    Hi, We"re searching for people/company who can make a project in Arduino.We need something like a people counter machine. It has to count the people inside of a room and send that data to a MySQL database by wifi. The counting method could be anything... with IR sensors, with cameras, detecting the mobile connections or wifi, or 3G connectios around, with ZigBee, Xbee, whatever...We don"t need the system to be very accurate but we want minimum error. The budget can be negotiated. Thank you for your attention.

  • $155 USD 8 days ago

    We need to make an arduino due communicate to and from a web site.We need to be able to read real time the data from sensors in internet site and we should be able to control digital ports from website buttons in real time.

  • $666 USD 8 days ago

    We are looking for a PCB and Embedded Developer that can take an idea and conceptualize it into a PCB. We are evaluating several options to accomplish this and while this is not a complicated project it will require someone with the skills to create a verified BOM and PCB Schematic and Layout.We have evaluated several potential parts but would like the guidance of someone that does this regularly to verify and or suggest lower cost parts, better platform and maybe even simplify the idea some.This will most likely require a board that has a Full Speed USB implementation as without this the USBMIDI protocol is not typically implemented. Use of capacitive touch and rotary encoders/potentiometers and sliders will be present in this system as well.We also would like to consider in addition possibly TI"s wilink modules for embedded ble and wifi, but we are open to alternative modules as well.We are not 100% committed to use a Cypress PSOC setup, but seems to be a good fit for the project but will rely on your expertise for suggestions in this area as well.Look forward to your expertise!

  • $444 SGD 9 days ago

    Required to implement an electronic safe lock using the Atmega32A microcontroller. Using an Atmel STK500 development board, a 16×2 LCD panel, a 4×3numeric keypad, and a solenoid.Fundamental operation of the safe is as follow: -At start up, the safe is unlocked,-And the user can start using the safe. -The user will key in a 4-digit number of their choice, which is the password, and lock the safe using the “*” key. -To unlock the safe, the user must key in the password he/she used to lock the safe and press the “*” key to unlock. - During the locking and unlocking process, the solenoid will actuate accordingly. -The safe will detect three consecutive wrong password entered and will toggle one of the LED on the STK500 board or displaying an error message on the LCD panel. -After the three consecutive wrong passwords enter detected, the safe will be permanently locked. Hence the user’s stored password will no longer effective after this point. When the safe is in the permanent locked state, an admin/master password is needed to unlock the safe.

  • ₹88888 INR 9 days ago

    Our company is based in Dublin, Ireland and we are looking for a freelancer to develop this product for us.Internet based Thermostat Development:The development will include 3 main units. The HUB (Main Unit), Transmitter (Remote) & Receiver. HUB (Main Unit): This unit will have the option to be powered by either mini USB cord or through re-chargeable battery.Will be communicating by Wifi (802.11) with the modem.Will be communicating by RF module with the Transmitter.Unit will display the current room temperature along with set room temperature of each rooms in house by communicating with the Transmitter.Unit will be communicating with web server to allow the room temperature to be controlled from any location. The connection to the web server can be either through mobile Apps or through computer webpages.Transmitter (Remote): This unit will be either powered through 2 AAA batteries or re-chargeable battery.This unit will have 2 way communication RF module to receive data from HUB and also to send the data to HUB and the Receiver.Will have a thermostat to record the room temperature.The unit will have small 2 Inch LED display.Unit will display Current room temperature, SET room temperature, Time and Date.Users can set the temperature through transmitter, which will calculate the current room temperature and switch ON /OFF the Receiver as required. Transmitter will also send the updated data to the HUB.Receiver:Will have a RF module to receive data from Transmitter.PLEASE NOTE: We are looking ahead to open our company branch in India and the person involved in this development would be given a leading role in the development team. Regards,Nessen Paul

  • $2777 AUD 10 days ago

    ssential this project is to enable real-time GPS information produced by a wireless unit to be displayed on to a Google Map webpage.I"m looking for a system which can consume open standard GPS coordinates and store them in a database table against a trip ID in real-time.It will then facilitate for a web user to select a particular trip and have the trip trail displayed on a web interface with a Goggle Maps back ground.Examples of the type of interface desired can be found at the following two live links. screen shots can be viewed by the attached "GPS Single Track Webpage Example.jpg" and "GPS Multi Track Webpage Example.jpg" images. There are existing examples which contain the required functionality; however they require proprietary GPS hardware dedicated position sending unit and web interface:.Examples include: http://international.findmespot.comhttp://www.yellowbrick-tracking.comAn example of the system client / server architecture desired can be viewed by the attached "GPS_Example System Overlay.jpg" imageFurther links of potential help are: that can consume GPS information and store it within an online data base.The information will comprise:• GPS coordinates• Time, Date• Trip IDInformation shall arrive in a simple comma separated format to aid in portability Web interface which can display tracking information in real time on a webpage utilising Google maps;• Select which trips to view or not view• Zoom and pan functionalityManagement interface which facilitates administration activities, including:• Editing of Trip ID• Enable, disable the trip visibility to the webpage• Delete of the tripAll project and source code is to be provided at conclusion of the project. Together with documentation supporting overview explaining the code. Please bid only if you have proven track record. Submit the bid with your sample work where appropriate. Please show your own creativity not someone else’s. Bids with no sample works and no reviews will not be considered.It is quite possible given the basic requirements that you already have an example Google Map implementation that already supplies majority of the project requirements, so may be a very quick rewarding project for you…!

  • $111 USD 10 days ago

    If you have bid on this project before it has changed as I am using a different setup.. please bid again.I have a simple project am using the same components and setup on this page..I would like three LED sequences to be made,The code needs to be written by you and then tested by me.I will be uploading the code you write to brand new 16F628a chips schematic of the LED device is below and all information you should need are on the pic projects page. are 8 LEDS and my sequence go like this-after power button is pushed-sequence 1)(1, 2, 3, 4), 5, 6, 7, 8, 5, 6, 7, 8, 5, 6, 7, 8, 5, 6, 7, 8, 5, 6, 7, 8, 5, 6, 7, 8, 5, 6, 7, 8, 5, 6, 7, 8, 5, 6, 7, 8, 5, 6, 7, 8, 5, 6, 7, 8, 5, 6, 7, 8, 5, 6, 7, 8, ETC. until stop.sequence 2)(1, 2, 3), 4, 5, 6, 7, 8, 4, 5, 6, 7, 8, 4, 5, 6, 7, 8, 4, 5, 6, 7, 8, 4, 5, 6, 7, 8, 4, 5, 6, 7, 8, 4, 5, 6, 7, 8, 4, 5, 6, 7, 8, 4, 5, 6, 7, 8, 4, 5, 6, 7, 8, 4, 5, 6, 7, 8, ETC. until stop.sequence 3)1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8, ETC. until stop.These sequences for example happen very quickly. a revolution of 1 to 8 happens within 1 SECOND. the winning coder will be expected to communicate over skype with me and provide the HEX code while it is uploaded to the CHIP.thank

  • ₹500 INR/hr 11 days ago

    Hi am working on multiple projects which involve use of arduino, I need some help in burning the boot-loader to the fresh Atmega328p-au (au=SMD package)I tried and getting few errors, I need some one who have done it before successfully and in another project I need some one to explain or help me in interfacing the TI CC3000 Wi fi module with arduino.

  • $1666 AUD 14 days ago

    We are looking to make our own vending control board. need to talk to MDB and a PC through USB.

  • €55 EUR 18 days ago

    We have a board with a ATmega32U4 MCU that comes preprogrammed with ATMEL bootloader and we need it to be Arduino compatible but in a low power mode (board current consumption

  • $155 CAD 20 days ago

    //coding#include const int photores = A0; //input LDRconst int pot = A1; //input potensioconst int led = 9; //input LEDdouble lightLevel; //variabel masukan LED//Tuning parametersfloat Kp = 0; //initial proportional gainfloat Ki = 10; //initial integral gainfloat Kd = 0; //initial differential gaindouble Setpoint, Input, Output; //variabel penyimpananPID myPID(&Input, &Output, &Setpoint, Kp, Ki, Kd, DIRECT);const int sampleRate=1; //kecepatan PID loopconst long serialPing=500; //waktu umpan balikunsigned long now=0;unsigned long lastMessage=0;void setup (){ lightLevel=analogRead(photores); Input = map (lightLevel,0,1024,0,255); Setpoint=map(analogRead(pot),0,1024,0,255); Serial.begin (9600); myPID.SetMode(AUTOMATIC); myPID.SetSampleTime(sampleRate); Serial.println(&quot;Begin&quot;); lastMessage= millis ();}void loop (){ Setpoint= map(analogRead(pot),0,1024,0,255); lightLevel=analogRead(photores); Input=map (lightLevel,0,900,0,255); myPID.Compute(); analogWrite(led,Output); now = millis(); if(now-lastMessage > serialPing){ Serial.print(&quot;Setpoint = &quot;); Serial.print(Setpoint); Serial.print(&quot; Input = &quot;); Serial.print(Input); Serial.print(&quot; Output = &quot;); Serial.print(Output); Serial.print(&quot;\n&quot;); if (Serial.available() > 0) { //If we sent the program a command deal with it for (int x = 0; x < 4; x++) { switch (x) { case 0: Kp = Serial.parseFloat(); break; case 1: Ki = Serial.parseFloat(); break; case 2: Kd = Serial.parseFloat(); break; case 3: for (int y = Serial.available(); y == 0; y--) {; //Clear out any residual junk } break; } } Serial.print(&quot; Kp,Ki,Kd = &quot;); Serial.print(Kp); Serial.print(&quot;,&quot;); Serial.print(Ki); Serial.print(&quot;,&quot;); Serial.println(Kd); //Let us know what we just received myPID.SetTunings(Kp, Ki, Kd); //Set the PID gain constants and start running }lastMessage = now; //update the time stamp.} }

  • $30 USD/hr 20 days ago

    We are developing a home automation solution based on NodeJS on Linux.The software needs to run on a low cost embedded system that needs the following:WIFIBluetooth BLEZigbeeZ-waveEnoceanWe want to set up a prototype based on raspberry pi or banana pi and plug to it all the above communications modules.But we need to come up with an efficient PCB design so that we can subcontract the production in China or other places where we can get the lowest cost and best quality.How can you help us achieve that?Adil Bouzoubaainjeen

  • $833 USD 22 days ago

    The project consist :1) create the arduino sketch with all the comunications library etc etc 2) php site where to control the sensors and save data in the sql database3) create a small apps ios and android that can manage the sensors as the website The project is quite simple and most of the informations components and code are already made .

  • $1111 USD 24 days ago

    Based on your profile, we have noticed that you have strong competency for Micro-controller and Bluetooth.We think you will be a great fit for our project, which involve a hardware and firmware design of a device that intended to be controlled by a mobile phone (android and iOS). The project will require a very secure approach for pairing method, proximity detection, and need for 2 way communication between the mobile phone and the hardware. No worry the app will be taken care of by another mobile developer which should make your life easier.Let us know if you are still available and willing to take on new project. If you so what would be the best time to have a quick chat.Details on the firmware/hardware will be discussed later in private messages.Hope hearing from you soon

  • R7777 ZAR 24 days ago

    I need Thermoelectric Peltier Cooler circuit with a temperature controller and a temperature sensor. These coolers need a heatsink on the hot side otherwise they blow. I need the heatsink to be as flat as possible I basically need the cool side of the Peltier to maintain water at a specific temperature even if the water temperature goes up due to external factors. I want a price for 2 options. 1. A physical hardware controller that maintains temprature according to a temprature switch or a bluetooth controlled system via android.

  • $1250 USD 25 days ago

    We need a person who will be able to program our PCB

    EEmbedded does not have any open projects.
    EEmbedded does not have any work in progress.
[see more]


[see more]



USB HID Controller

Sep 2013 - Sep 2013 (1 month)


USB HID using Teensy 3 development tool

Magnetic Card Reader

Aug 2013 - Dec 2013 (4 months)

PCB design, <br />Firmware development,<br />Prototype development


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