John L.
Houston MN, MN
Power Electronics and Lighting
$150.00/hr
I am John Lemke, an embedded electrical engineer with a degree in physics who has been practicing electronics design for over 20 years. I would like to share the knowledge gained from my experience designing electronics focused on power conversion and microcontroller based core logic. This knowledge comes from designing LED drives, fixture management controls, and light mixing algorithms in the LED lighting space and designing power supplies, communications interfaces, and precision analog signal conditioning for the industrial control space.
Work history
Answer a few basic questions about diodes
Mar 1, 2019
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Jan 26, 2022
Private earnings
LED Array Driver Schematic Review
Jan 13, 2019
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Jan 26, 2020
"Solid math skills for circuit and thermal calculations. Very proficient in reviewing schematics and gerbers."
Private earnings
Outside-in Controller Evaluation of New Technology (Early Stage) - Upwork enterprise client
Oct 2, 2019
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Oct 3, 2019
Private earnings
500W SMPS Design
Jul 30, 2022
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Present
Job in progress
Private earnings
PCB Design Reviews for Device
Jul 18, 2020
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Present
Job in progress
Private earnings
Analog industrial control circuit
Jun 17, 2020
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Present
Job in progress
Private earnings
Battery Operated Multi-LED System
Jan 23, 2017
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Present
Job in progress
Private earnings
DC LED Board Review
Jul 28, 2016
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Present
Job in progress
Private earnings
AC LED Board
Jul 2, 2016
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Present
Job in progress
Private earnings
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