Monitor tiny variation in voltage - ESP32

€30-250 EUR

Closed

Posted

over 6 years ago

€30-250 EUR

Paid on delivery

We need to have a design based on ESP32 SoC. I have a microscopic membrane in my lab, this piece which we call it NMS has a variation of voltage caused by its operation. Similiar to the action potential in neurons of a nervous system. We are trying to build an electronic measurement system, which could capture the variation of voltage in -70mV to -55mV range. We want to have an accuracy of at least 1mV or possibly less in our measurements. We need some advice for building the measurement probe too, specifically, we need a way of connecting our NMS membrane which is sandwiched between a microscope slide and a cover slip to our measurement system. Thank you all.

Circuit Design

Electrical Engineering

Electronics

Engineering

Project ID: 15824016

About the project

9 proposals

Remote project

Active 6 yrs ago

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9 freelancers are bidding on average €466 EUR for this job

@sagradoamicus

Hi I am experienced electronics engineer I can do it for you. I have over 8 years of experience in analog and digital electronics designs. Please get in touch to discuss it in further details Relevant Skills and Experience I have completed over 200 projects here, please review my profile to see the feedback from my previous employers. I am waiting for your reply to start regards Proposed Milestones €1000 EUR - milestones (details can be discussed )

€1,000 EUR in 15 days

4.9

(246 reviews)

7.9

@zarnescugeorge

Hello Ali S.! Why did you hide my bid? Do you prefer only some type of freelancer? Are you racist? Hello! I don't know why you hidden my bid. Maybe by error. I can help you asap and I am real! I've worked at two universities for 6 years and I have broad electronics skills. Hello! I have 8 years industry experience as an electronics pcb design engineer. I've designed a lot of systems for employers in UK, Spain, Belgium, Austria. Send me a message with all the details Relevant Skills and Experience Electronics/Analog/Digital/PCB/Layout/Circuit Design Proposed Milestones €833 EUR - M1

€833 EUR in 14 days

5.0

(95 reviews)

7.2

@Davelelievre

I have over 35 years experience as an electronic design engineer, please see my profile for more details If you think I can help then please send me further details Best Regards Dave Lelievre Relevant Skills and Experience I have designed many interface in the past that operate from much lower voltages than the one you have described such as thermocouples. Proposed Milestones €222 EUR - Ignore, to be discussed I assume you want this to interface to either the ADC in the ESP device or a separate accurate ADC

€222 EUR in 10 days

4.9

(25 reviews)

6.3

@microembedded

hi i am an electrical engineer. i have vast experience related to circuit design and esp32 embedded system design. i have done many embedded system projects wth esp32. Relevant Skills and Experience i have hardware experience pcb design and esp32 embedded systems. let me know if you are interested. we can discuss further on chat. Proposed Milestones €900 EUR - project

€900 EUR in 30 days

4.8

(33 reviews)

6.3

@ajeetinvis

I have worked on measuring low voltage measurement circuits. I have 3+yrs experience in Embedded system working in Mumbai, India. Relevant Skills and Experience Embedded, Electronics, Circuit Design Proposed Milestones €200 EUR - App Development You want to have an idea or design of the circuit?

€72 EUR in 4 days

5.0

(2 reviews)

1.2

@eopskzs

I'm interested in your academic work and would like to offer my help. ESP32 SoC is the easy part. The problem lies on the probe used. You may have to use a contactless sensor, in which case the acquired signal will be a lot weaker. Use of a low noise amplifier coupled with a better ADC might be required in such a case. As always it all depends, I need more information on the subject. Relevant Skills and Experience Electronics Embedded systems Programming Analog Electonics Proposed Milestones €200 EUR - Delivery of the ESP32 code and report Do you have an article on the subject so that I could understand the physical properties of the system better.

€200 EUR in 7 days