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$30 USD / hour
Flag of UNITED STATES
$30 USD / hour
It's currently 2:54 AM here
Joined September 22, 2016
0 Recommendations

Stuart B.

@StuartBorden

5.0 (6 reviews)
4.3
4.3
100%
100%
$30 USD / hour
Flag of UNITED STATES
$30 USD / hour
90%
Jobs Completed
100%
On Budget
100%
On Time
13%
Repeat Hire Rate

I am an engineer with 30+ years experience in various fields from system design to electronics

I have experience in mechanical design, electrical engineering, software development, real-time control, analytical instrument design, semiconductor chemical process equipment design, embedded design, Electronics design and PCB artwork from Spartan 3A, ARTIX-7, TMS320C6745/C28346, PIC8~32bit, 1-8 layer PCBs. High-efficiency SEPIC, Flyback, Buck, Buck-boost power design 5 ~ 150W, Isolated DC/DC 96% efficiency USB power system designs. Stand-alone, multi-output DC/DC converter module design. . Recent designs include on-line fruit-sorting analyzers, modular conveyor control. 8K Linescan POCL 80klps, 18-bit DCDS spectrometer system, portable pesticide analyzer, soil analyzer, USB 2.0 w/power isolator, TMS320C28346 control card w/4-26 VIN and test jig and usb-isolated programmer/debugger tool. Instruments and control systems also include Windows GUI applications using Borland/Embarcadero C++. . 5 patents in various disciplines (Korean), 5 scientific journal entries (Korean journals)

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Portfolio

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Reviews

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Showing 1 - 5 out of 6 reviews
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1.0
$25.00 USD
not gone well
Electronics
Microcontroller
Electrical Engineering
PCB Layout
AutoCAD
+1 more
D
Closed User
@DonSaad
7 years ago
5.0
$250.00 USD
Very professional and knowledgeable. Definately will hite again.
Electrical Engineering
PCB Layout
Arduino
L
Flag of Lenny L.
@lofbele1
7 years ago
5.0
£150.00 GBP
Top notch experience and easy to talk and get the best result with
Microcontroller
Materials Engineering
PCB Layout
Circuit Design
User Avatar
Flag of Daniel R.
@daromer
7 years ago
5.0
$10.00 USD
He knows his stuff (i.e. he knows what he's doing, unlike others). My project would have ended in disaster if he was not around. Thanks for your help! :) I highly recommend this freelancer. I'm sure I'll approach him if I have other projects like this.
Electronics
Microcontroller
Electrical Engineering
PCB Layout
P
Flag of Gene Carlo D.
@pandalion98
7 years ago
5.0
$15.00 USD
Stuart made a good job and have good knowledge in dc-dc
Electronics
Electrical Engineering
O
Flag of Or G.
@or682
7 years ago

Experience

Director of Technology and Development

OTS Co., Ltd.
Oct 2005 - Present
Developed EARA covert fuel analyzer (patent), Delphi non-destructive fruit-sorting system (patent), table-top multi-cell NIR analyzers, elevator emergency auto-dialing system (patent), covert fuel-volume measurement system (patent), conveyor controller system, 8K linescan camera, pesticide analyzer, soil component analyzer , DC/DC power modules, USB isolator, TMS control card and development system. Piezo-electric high-resolution water mains meter (patent). Others

Director of Engineering

SpectronTech
Jul 2002 - Oct 2005 (3 years, 3 months)
Led re-design of HN-1100 NIR analyzer. Developed HN-2200 NIR analyzer, Solomon non-destructive fruit-sorting system, portable non-destructive fruit sugar analyzers, prototypes for non -invasive blood glucose analyzers based on NIR technology, later in support of Olympus research team for same effort.

R & D Department Manager

ISTC (HIT, inc)
Apr 1998 - Jul 2002 (4 years, 3 months)
Ran the R&D department, producing prototypes for RFGDS analyzers, HC-OES liquid analyzers. Also designed prototypes for custom systems for Quadrupole Mass spectrometers for Kyoungnam university, Seoul university and Korea Atomic Energy Research Institute. Developed a line of Semiconductor Chemical distribution systems that never went public after the financial crisis in Korea.

Qualifications

KOR1020130141328 Quantitative analyzer of petrols

Korean Patent Office
2015
Method and apparatus for covertly measuring volume of fuel dispensed by fuel pumps.

KOR1020140095574 On-demand Measurement of Blood Glucose

Korean Patent Office
2016
RFID powered on-demand insertable micro blood probe

KOR1020090110844 Water gauge having piezoelectric element

Korean Patent Office
2010
Novel method for high-resolution water mains metering

Publications

Study on the dev. of new non-destructive measurement method using NIR spectroscopy on fresh eggs

Journal of the Korean Chemical Society Vol 49 No. 6 [2005]
A simple idea turned into a very interesting device. The freshness and quality of eggs can be measured with NIR spectroscopy on-line for every single egg.

The Fund. Stud. and Dev. of the Modified See -Through HCGD Cell for AES Analysis

ANALYTICAL SCIENCE & TECHNOLOGY Vol 15 No.6 [2002]
Revolutionary design of chamber and cell giave incredible performance.

The Studies of Conductive and Non-Conductive Multi-Layer Depth Analysis by RF Gas-Jet Boosted GDAES

ANALYTICAL SCIENCE & TECHNOLOGY Vol 15 No.3 [2002]
More tests on our developed system.

Study for Cond. and Non-cond. Multi-layers Depth Profiling An. of RF Gas-jet Boosted GD Spectrometry

ANALYTICAL SCIENCE & TECHNOLOGY Vol 15 No. 2 [2002]
Development of methodologies for depth profiling using our system.

Investigation of Optimum Condition on the Modified Gas - Jet Boosted Glow Discharge Cell

Korean Society of Analytical Sciences [1999]
Test results on our newly developed system.

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