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$20 USD / 小时
PHILIPPINES的国旗
$20 USD / 小时
目前这里是3:51 上午
五月 14, 2015已加入
1 建议

Lester S.

@CircuitGenius

4.9 (6条评论)
4.7
4.7
100%
100%
$20 USD / 小时
PHILIPPINES的国旗
$20 USD / 小时
100%
工作已完成
100%
在预算内
100%
按时
17%
重复雇用率

Senior Electronics Design Engineer

Specialties: 1. AC-DC power supply design, switching and linear, multiple outputs or single, trimmable or fixed 2. DC-DC power supply design 3. Offline AC-DC adapter design 4. Charger design with constant current and constant voltage, AC-DC 5. Charger design with constant current and constant voltage , DC-DC for Li-Ion, Li-Poly, LiFeP04, Lead acid and so on 6. LED lighting related applications 7. Solar panel energy harvesting and charging systems 8. Switching converters such as buck, boost, buck-boost, flyback, forward, LLC, half bridge etc 9. Amplifiers, filters, switch 10. MCU, DSP and digital circuits 11. Schematic and PCB using eagle 12. Simulations using LTSpice, Matlab, Simulink, Simetrix and Simplis 13. Design analysis and computations using Mathcad 14. Control system design, type 1,2,3 and PID using spice, SISO tool in Matlab or Simulink control design

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文件夹

2457037
2457052
2151320
2151316
2119983
2049698
2457037
2457052
2151320
2151316
2119983
2049698

评论

变更已保存
展示6中的1-5条评论
筛选评论规则:
5.0
$80.00 USD
CircuitGenius really met ALL my needs. Revisiting him for business was the best thing for me & my team.
Engineering
Electronics
Matlab and Mathematica
Electrical Engineering
+1更多
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的国旗 Gregory H.
@ghovagim
8 年前
4.4
$190.00 USD
CircuitGenius was able to make special accommodations for the work I requested and still got the project done within a great window of time.
Engineering
Electronics
Electrical Engineering
PCB Layout
Circuit Design
用户头像
的国旗 Gregory H.
@ghovagim
8 年前
5.0
$194.00 AUD
Courteous, helpful, polite and extremely knowledgeable. Provided design in time frame and assisted with ordering process. Extremely detailed files provided. Highly recommended.
Electronics
Electrical Engineering
PCB Layout
用户头像
的国旗 Jacob J.
@jacobjarick
8 年前
5.0
₹12,500.00 INR
Very good service, timely work, will recommend and hire again.
Electronics
Electrical Engineering
PCB Layout
用户头像
的国旗 Nikhilesh M.
@mnikhilesh
8 年前
5.0
$230.00 USD
He is quite professional. We communicate very well. We are satisfied with his work and we really appreciate his hard work.
Project Management
Electronics
Industrial Design
Electrical Engineering
PCB Layout
J
的国旗 Ping J.
@jiangpingtj
8 年前

经验

Senior Electrical/Electronics Design Engineer

Artesyn Embedded Technologies (Formerly Emerson Network Power)
1月 2011 - 6月 2016 (5 年, 5 个月)
Activities: 1. AC-DC power supply design, switching and linear, multiple outputs or single, trimmable or fixed 2. DC-DC power supply design 3. Offline AC-DC adapter design 4. Charger design with constant current and constant voltage, AC-DC 5. Charger design with constant current and constant voltage , DC-DC for Li-Ion, Li-Poly, LiFeP04, Lead acid and so on 6. Switching converters such as buck, boost, buck-boost, flyback, forward, LLC, half bridge etc

Application Engineer

Matlab and Simulink
8月 2012 - 2月 2013 (6 个月, 1 天)
Main function: Simulations and modelling related to control systems.

Hardware Development Engineer (Automotive)

Confidential
1月 2006 - 1月 2011 (5 年)
• Design smart junction boxes or computer boxes for vehicles from scratch to mass production • Participated in the development of the other new projects starting from RFQ stage to mass production stage as well • Led cost study and cost reduction for the different cross functional teams • Implementing customer requirements and specifications • Design schematic and generate BOM • Performing design analysis such as Worst Case Analysis , Stress Analysis, Monte Carlo Analysis, Fault Tree Analysis , Design Failure Mode and Effects Analysis, Failure Analysis, Reliability Prediction Analysis, Sneak Path Analysis, Thermal Planning and Analysis, circuit simulations, etc • Performing benchmarking activity, design validation, product validation • Led Load Panel designs • Participating in the RFQ and RFI activities and electronic component selection • Extending plant/factory support and answer internal and external issues and concerns • Making engineering documentation which includes data notes, HITS, NM, DFC/PCR/ECO, etc • Making tests specification such as ICT, FCT and EOL for factory used

教育

Electronics Engineering

Cebu Institute of Technology, Philippines 2000 - 2005
(5 年)

资质

Registered Electronics Engineer

PRC
2006
This is a qualifying exam composed of electronics, communications, mathematics and allied sciences. Those who passed will be registered as electronics engineer of the country.

出版物

How to Determine Optocoupler Operation Saturation or Linear

http://electronicsbeliever.com/how-to-determine-optocoupler-operation-saturation-or-linear/
There are several ways on how to determine Optocoupler operation. The old school method is to build an actual circuit and measure the collector-emitter voltage. If the reading is low enough (equal to the saturation voltage of the device) or ideally zero, the Optocoupler is operating at saturation. If the reading is higher than the specified saturation voltage but lower than the collector supply level, the device is operating at linear mode. Another method on how to determine Optocoupler operation is thro

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