# Ohm's Law help

I have a test project where I am applying 10 volts DC to a hydrogel electrode. The hydrogel electrode is attached to a test PCB.

The hydrogel electrode measures 2" x 2". The test PCB measures 3.5" x 3.5".

The test PCB has 20 test pads which trace to 20 test probe points. The goal is to measure the voltage that is conducted through the hydrogel electrode to the test pads and ultimately to the test points. There is a voltage drop due to the resistance of the hydrogel electrode of approximately [url removed, login to view] (varies). The purpose of the 20 test pads lying under the hydrogel electrode is to measure the current dispersion in the pad. This all works well. I am using a regulated power supply and the DC voltage is very stable. I am not getting a measurable amp reading.

My project is this: Given this test setup how can I determine the resistance or inversely the conductance of the hydrogel electrode. I am missing the current measurement but I do have very good data on the voltage drop.

Is there a formula for determining the current and/or resistance from the voltage drop?

I am not an electrical engineer. The solution needs to be simple. I can't get involved in complicated test setups or calculations.

Færdigheder: Elektrisk Ingeniørarbejde, Elektronik

Om arbejdsgiveren:
( 7 bedømmelser ) Irvine, United States

Projekt-ID: #926453

## 21 freelancere byder i gennemsnit \$73 for dette job

tucupeis

\$30 USD på 1 dag
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reallifetech

See details in MB.

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ammarsaleem01

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eldemokraty

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euripedesrocha

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AbhaBrajesh1956

I can give you the solution, Abha

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shyamalbag

I am an electrical engineer having 9 years of working experience, the problem is very simple, u will get the solution within one day of awarding the bid on me.

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mayday1985

I have masters in electrical engineering. think i should be able to help.

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yrawna

dear as u get very low current so it means that the Resistance (of series circuit i-e Hydrogel and testPCB )is very high. so measure the resistance of test PCB external by OHM meter. then U have the readings of Vol Mere

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GoranOH

Your formula is R=U/I you must measure current to calculate resistance.

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bilal1987

i can help you regarding this because i was teacher in engineering university

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choochoo

I can help.

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mulukkano1979

Dear Sir, I have many experiences with Physics problems especially in circuits analysis. Thank you very much. Best Regards, Sayed Mulkhan F

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fawazahmed

Plese check PMB

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ratonxi

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waheedmushtaq

I will submit it to you in 10 days

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thoward

I am an Electronic Engineer and this should be a piece of cake. I can tell/show you imediately after your bid decision.

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embeddedcomeng

See PM.

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joshua023