Last seen: Jul 19, 2014 5:30 AM EDT
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Experienced Embedded System Engineer

Username: baobui

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Location: HOCHIMINH, Vietnam

Member since: September 2011



(14 reviews)

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2 users have recommended this freelancer.

My projects:

  • $474.00 USD
    Profile image for Seller Dobaz


    Sep 10, 2013

    5/5, it says it all. A serious and honest worker. Thank you very much.

    Project Description:We need to develop a firmware + bootloader code for a tag device based on the STM8L051F3. The code needs to be in C, not assembler. I work with Atmel devices and need to make the transition to ST but I miss time to do it and I need help to make this code fast...
  • [Sealed]
    Profile image for Seller andydmo


    Sep 5, 2013

    Excellent worker, great communication, will work with again..

    Project Description:[This is a Private Project. You must be logged in to view the Project Description]
  • [Sealed]
    Profile image for Seller Dobaz


    Jun 7, 2013

    It was a pleasure to work with you. He impressed me on how he found a good solution to my needs and to help me. I will work with you again.<br/>

    Project Description:Project on ST micro controller (STM8L051F3). I need to develop a system based on the STM8L051F3 microcontroller. I know Atmel’s uc pretty well but this time I need to develop on the ST uc. The problem...
  • [Sealed]
    Profile image for Seller robinbek


    May 14, 2013

    Bao was a great asset, he did the job and then some, I will use him again. He code worked the first time and he was there to walk me thru it.

    Project Description:[This is a Private Project. You must be logged in to view the Project Description]
  • $45.00 USD
    Profile image for Seller assignmentshelp


    Apr 27, 2013

    Great Work..I was not expecting so good work to be frank but he was above my expectationsI will work with him blindly now !!

    Project Description:I WANT THE QUESTIONS IN THE ZIP FILE TO BE DONE IN 24 HOURS ( 26 April ) There are 10 simply problems, you need to solve all of them and show works for each one Price : $ 30
  • $35.00 USD
    Profile image for Seller purecubemedia


    Apr 21, 2013

    Highly Recommended :)!

    Project Description:Hello, I need boolean expression for 4 bit signed magnitude comparator say num 1 is A = SA A2 A1 A0 and num 2 is B= SB B2 B1 B0 where S represents signed bit..just to give you an idea of what i am talking about....
  • $80.00 USD
    Profile image for Seller Videomatic


    Apr 8, 2013

    Mr Baobui is a real Pro on his Domain , availlable , fast an communicative .

    Project Description: Hello mr. Bao , I need some consultancy for design a net-datalogger using Ti CC2530 . I saw you are working on something similar , may be you can help me to take the right decision ...
  • $1000.00 USD
    Profile image for Seller wallsjnz


    Feb 20, 2013

    Bao has been a pleasure to work with - knowledgeable, diligent, honest and friendly. Our preferred method of communication ended up being IM via skype and this worked very well overall.

    Project Description:[This is a Private Project. You must be logged in to view the Project Description]
  • $200.00 USD
    Profile image for Seller HkumarN


    Oct 24, 2012

    Bao developed my project diligently and he was always professionally responsive to my change request. The SW application he developed for me is working great and I'll gladly hire him again.

    Project Description:This project requires to generate a repeating pattern of signals with one I/O of the STM32F205ZG, and then detecting the pattern in an input port of the STM32F205ZG (the I/O which generates the signal...
  • $2500.00 USD
    Profile image for Seller chjoly


    Oct 9, 2012

    Bao has done an exceptional work on this project. I would recommend him anytime.He is dedicated, qualified and easy to work with.

    Project Description:Looking for someone to build the architecture and firmware of a controller of an LED Matrix of 196x64 LEDs. This should include pwm emulation, fpga interfacing, speed optimization and color optimization...
    baobui has not completed any projects.
  • $333 USD In Progress

    You will need to create a vanilla Board Support Package, with ported open source software for the TI DM368 series chips. The system must accomplish all the tasks that are in the current TI DVSDK / BSP. The major work is replacing non open source code and creating code for the image processing system and drivers for the cmos sensors OV2715 and OV55642.You must have experience with digital imaging algorithms, compression algorithms, CMOS sensors, and creating BSP&quot;s.

  • $888 USD In Progress

    We are looking for someone to do the design for a relatively simple PCB that we need to be made.The PCB contains gsm module with interface USB / RS232.Need to create a prototype that has been approved.

  • [Sealed] In Progress

    I have a simple project- MPU - STM32F100RBT6 (STM32L DISCOVERY board)- ACCELEROMETER (I2C interface) - Freescale- GSM MODULE - SIMCOM 908 (RS232) - make call/send sms on motion detection.I have done some work on it. But I am not an expert in SW design. So I have hacked it to work ;-)I need someone experienced to work on the design from start and provide me working source-code.Only people with direct experience should apply. Please send me some information about work done using STM32 design.Thank you

  • €750 EUR In Progress

    Hello. We need to develop battery powered device which is receiving information from outside sensors. From the sensors you get impulses (+Vdd/0). The length of the pulses (the time from +Vdd to 0V) must be stored with timestamp for further processing. The memory used for the information should be at least 2mb. The data must be easely downloaded throught USB or similar connection. The device should be as light as possible, to consume minimal power and sleep when does not receive information. Footprint should be as small as possible for embedding.

  • $250 USD May 30, 2014

    I have some old legal software with dongle protection and I used to get very good service on dongle renewal from the supplier.At present, the software company is not in business anymore but I still have to keep the software with my daily job so I need you to help making the software works without dongle.I have seen your bid dated since 9 months ago on similar project at 250 USD so I&quot;d like to have your idea about this.Please feel free to contact me for any further information you might need.With best regards,Vincent

  • $350 USD Apr 1, 2014

    Hello,I&quot;m Fariz from Indonesia.I want invite you to help me make pcb schematic and design.I have sierra wireless airprime q2687G/RD series, and i want to make product with usb interface. using Silabs CP2102 or FTDI.I hope you can help us.thanks/Fariz

  • [Sealed] Mar 4, 2014

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

  • $120 USD Feb 3, 2014

    I need a dongle emulator or work around for Creative Golf 3D software. My budget is $120. I need the software to run in full version mode without the dongle. This is the link to the software download: email me at and let me know if you can help. Thanks!

  • €100 EUR Jan 4, 2014

    the project which i am doing is&quot;Evaluation of a 3 axis accelerometer and gyroscope&quot;.. i hv STM32F407 microcOntroller board and GY521 breakout board(MPU6050) my microcontroller acts as a master and mpu 6050 acts as a slave and interfacing has to be done to establish the so called &quot;communication&quot;between these two via I2C bus and code has to be written in software Cocoox Coide .MPU 6050 consists of accelerometer and gyroscope sensors which reads sensor values....when interfacing is done.....This is what the project is all about.Using DAC i have to read the values on the oscilloscope

  • $1000 USD Nov 4, 2013

    I have some fuel dispenser related files in .mhf format (I got these through the programming laptop, the company guys, use to program various boards of the fuel dispenser, by copying them on a flash drive).What I want is someone to convert these files into editable format (and if possible, rewrite the code too, so that it can be loaded back in the motherboard).Do, let me know if you can manage it.

  • $1111 USD Sep 29, 2013

    Goal of the project is to develop, code and deliver a working prototype of a simple PCB allowing two ways communication from CAN to WiFi interfaces.(CAN2WiFi PCB) Project requirements:1. Using WiFi module: RS-9110-N-11-22 required working SPI and USART interfaces2. Using STM32F4 processor, PICOBLADE-5 by SWD programming interface,3. handling two CAN buses4. CAN buses with SPOX-4 connector (GND, CANL, CANH, VOUT)5. VOUT 5V 1.5A, processor controlling ON/OFF - two separate voltage output for two short-circuit proof buses. Short-circuit detected by the processor.6. Status indicators, 4 LED controlled from the CPU, 1 LED power supply7. uSD card connector on the SPI8. 7-36V power supply, voltage measurement9. compact size PCB (no more than 76.2 x 43.2 mm with mounting holes in the corners 4xM3)If there are any questions please do not hesitate to ask.Best regards,K.J.

  • $45 AUD Sep 5, 2013

    Hi, there are two electrical power transmission questions that need to solved.

  • $500 USD Jul 28, 2013

    can i discuss the project details in skype

  • $30 USD/hr Jul 24, 2013

    HI, This is Dr.Atef from Egypt. We need your skill to develop a special vibrator that will be used in dental field with the following details:1- Small vibrator motor (6V) (if you don&quot;t have a source for it i have one)2- A USB battery charging circuit with led lights indicators for (low battery, charging, full battery) (i have sources for usb charging circuits)3- 2 lithium ion batteries 3.7v*2 with a voltage regulator to output the required 6V for the motor4- LCD screen that shows many data like remaining usage minutes like a countdown from 20 minutes till 0 5- a smart power on\off switch that switch on and off on long press and pause and start vibration on simple press (after switching it on it is supposed to turn off after 20 minutes automatically) 6- the device is supposed to be used 20minutes only per day and no more so that i need an embeded SD card that can be removed and connected to PC software and this card contains data like: duration of usage each day, whether has or has not been used everyday

  • [Sealed] /hr Jul 6, 2013

    We need Schematic and PCB Layout for an expansion board with a Raspberry module and some SMD devices with connectors. Design will be done under Altium. We contract the service in 2 parts, first the schematic and in a second step the PCB layout.See overview attached.

  • $2000 USD Jun 26, 2013

    [Project]GSM/GPRS Tracker with sensors for Low Power Application. Module will be dormant most of the time, wake up periodically to check for an incoming SMS, and if an incoming SMS is there, answer with the location of the tracker. [Components]- GSM/GPRS + GPS (SIMCO908)- Compass (AK8975)- Accel (LIS331DLH)- Battery Level Monitor (LTC2942-1)- Microcontroller TBD- GSM/GPRS + GPS Antenna TBD[Requirements] Please see attached block diagrams.[Taks + Milestones]1- Discussion on Components and FW functionality. Draw by hand HW block diagram. Schematic Capture. Board Layout. (MILESTONE1 $ TBD)2- Spin Two Boards, Debug (MILESTONE2 $ TBD)3- Code FW discussed in basic FW block diagram in (1). (MILESTONE3 $ TBD)[Deliverables]- Schematic Capture- Board Layout- Source Code for FW- PCB (physical board, HW)[How to Bid]Place a total bid and indicate three milestone payments as indicated above.

  • $555 USD Jun 11, 2013

    I need to get a power adapter with an integrated USB charger manufactured in China. The manufacturers require engineering drawings. I have a sketch of what I want, with a full functional description. This is a simple adapter with a straight AC pass-through and a USB charger integrated in the middle. The person doing the engineering drawings need not be a certified electronics engineer but must understand formal Engineering Drawings and must understand what to display on these drawings for manufacturing.

  • £1666 GBP Jun 10, 2013

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

  • $30 USD/hr May 14, 2013

    Hello ,Need logo customisation image for NS2 on existing AIROS firmware ..RegardsAmar nath

  • $300 USD May 13, 2013

    I have a Software that works only with the corret USB cable (dongle).I want the software to be cracked so i can use it without it asking for the dongle. I have received the software as a demo via you send it. IT is called creative golf 3d but you need to connect the dongle for it to allow access to whole game. At the moment in demo mode you can only play 3 holes of golf. I have the gc2 hardware which is the golf camera system its just the hack to get around the dongle part. I can send you the file by you send it.

  • $550 USD Apr 25, 2013

    Hi everyoneI am looking for a PLC programmer expert that can help me with a specific project about a program for switching boards for SYSLAB.I am new to PLC programing so i need a person that can help me guide in a professional way PLZ only bid if you are expert in this area .. hope to hear from you soon !

  • $5000 USD Apr 3, 2013

    Xin ch&agrave;o, m&igrave;nh hiện đang c&oacute; 1 project kh&aacute; lớn về PHP, nếu quan t&acirc;m bạn c&oacute; thể mail cho t&ocirc;i qua địa chỉ: thanh.ngvt hoặc nick Skype tương tự, ch&uacute;ng ta sẽ thảo luận th&ecirc;m

  • $15 USD/hr Jan 29, 2013

    Hi,I am wondering if you could help me.I have a STM32VLDiscovery Microcontrollerboard and I need a program for measuring voltage and current with SPI and to show this on a display ( SainSmart 1602 LCD Keypad Shield for Arduino Duemilanove UNO MEGA2560 MEGA1280). And as well as a RTC. I have got already a program for the display which is kind of working. It should be done with KeiluVision4. Do you think you can do that? How many hours do you think does it take?Regards,Markus

  • $750 USD Jan 12, 2013

    This project is in continuation of previous projects. I need A,B,C as mentioned below within next seven days!A- I want complete my thesis: with following chapters... I already have some work I will provide to the selected candidate.1- Problem description and analysis 2- Proposed solution3- Design and implementation4- Results5- Discussion of Results6- Conclusion and Future WorkB- Simulation of the work on MATLABC- PresentationPrevious work would be provided to selected freelancer.

    baobui does not have any open projects.
    baobui does not have any work in progress.
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Team leader

Oct 2010 - Present (3 years)


Team leader and project manager in the field of electronics and embedded system


Apr 2002 - Aug 2010 (8 years)

HCM City University of Technology

Teach and do research in electronics and embedded system design.<br />


Bachelor of Electronics and Telecommunication

Dai hoc Quôc Gia Tp. Hô Chí Minh


MsC of Embedded System Engineering, University of Leeds,



Embedded System Programming


This certificate is for an embedded system programming course in Singapore


A PLL-Based Phased Array Method to Minimise Phase Quantisation Errors and Reduce Phasing-Lobes

2010 IEEE Ultrasonics Symposium.

In this paper, PLL are used to drive an array of ultrasonic transducers to reduce phasing-lobes. Altera stratix II was used for testing.