Lindsay Lipschultz
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Lindsay Lipschultz
  • About Me
  • Projects
  • Art
  • Contact
April 2019 - March 2020

John Rogers Research Lab

I worked with post-doc Keyongha Kwon as an undergraduate researcher in the John Rogers Lab at Northwestern. I supported several projects by optimizing PCBs and fabricating and testing prototypes.

Client

John Rogers Research Lab

Challenges

  •  How can we monitor skin health by measuring skin hydration non-invasively?  
  •  How can we measure hydration and ion concentration non-invasively while exercising?
  • How can we monitor blood flow and pressure constantly and wirelessly?

My role

  • PCB optimization
  • Prototype fabrication
  • Prototype testing
  • Presenting results

Skills

  • Microscopic soldering
  • CAD
  • Circuit design
  • Silicone encasing

Solutions

  • A wearable skin hydration sensor
  • A wearable sweat sensor
  • An implantable hemodynamics sensor

Publications

"Wireless, soft electronics for rapid, multisensor measurements of hydration levels in healthy and diseased skin," PNAS, February 2021.

PNAS

"An on-skin platform for wireless monitoring of flow rate, cumulative loss and temperature of sweat in real time," Nature Electronics, March 2021.

Nature Electronics

Skin Hydration Sensor

Optimized circuit design to have minimal surface area while still being able to securely adhere to the skin. Shown below are iterations of the PCB design from newest to oldest.

Sweat Sensor

Designed and tested PCBs with different thermistor layouts to optimize heating of thermochromic dye. Shown in figure d below:

Hemodynamics Sensor

Optimized induction coil to have minimal surface area and high Q factor at the same frequency as the wireless power transmitter.

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