Hi, Please help me out since unable to get the solution. I am working on electrochemical sensors, where I need to do following tasks using Arduino UNO To convert the milliVolts's data from the two electrodes (i.e., their difference) which is in the range of 10-200 mV. I want to amplify this data…

Some Arduino boards can set analog inputs as differential inputs with a gain. That is not often used, and there is no common code for it. A classic solution is with a OpAmp, that is the theoretical solution that we learned at school. But I think that the most straightforward solution is an externa…

Raw signal from electrodes are in MilliVolts range (10-200 mV). I want this signal to be amplified to a range of 0-5 Volts. Further display both the data onto a LCD i.e., both mV and Amplified Volt data.

When you amplify the signals in the range of 0...5V, then you use the Arduino with the 5V as voltage reference. That is not accurate. You need a good voltage reference to be able to measure a voltage. That means you don't have to amplify the signals for the 0...5V range. According to the datasheet…

[image] dharmesh93: I am working on electrochemical sensors, where I need to do following tasks using Arduino UNO To convert the milliVolts's data from the two electrodes (i.e., their difference) which is in the range of 10-200 mV. I want to amplify this data to display it on LCD to a range of…

[image] dharmesh93: Raw signal from electrodes are in MilliVolts range (10-200 mV). I want this signal to be amplified to a range of 0-5 Volts. Further display both the data onto a LCD i.e., both mV and Amplified Volt data. You want to read the analog signals from the sensor and convert them…

@dharmesh93 1. Amplify your electrode volatge to about 4.5V using the following difference amplifiier (Fig-1) and then feed to A0-poin of UNO. [diffAmp] Figure-1: 2. It is recommended that you use +/-5V supply to minimize CMRR. If -5V is not available, then you can try with single +5V supply a…

You can't use a 741 from +/-5V rails with a 0..5V logic chip, it won't have the voltage swing to get above about 2V, and it will fry the microcontroller if the output dips below 0V. A rail-to-rail opamp would be needed - indeed an instrumentation amp is probably a wise choice - the source impedance…

[image] MarkT: You can't use a 741 from +/-5V rails with a 0..5V logic chip, it won't have the voltage swing to get above about 2V, and it will fry the microcontroller if the output dips below 0V. I appreciate your comment and observation. However, I don't see how 741's output can swing below…

[image] GolamMostafa: I appreciate your comment and observation. However, I don't see how 741's output can swing below 0V when the elctrode output is always positive. Its got +/-5V supplies - so its output can swing down to negative voltages - its best to provide hardware protection against t…

To amplify milliVolts (say 10-100 mV) data into 0-5 Volts using Arduino UNO

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UKHeliBob August 20, 2021, 9:57am 5

@dharmesh93 Please follow the advice given in the link below when posting code . Use code tags when posting code here to make it easier to read and copy for examination

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To amplify milliVolts (say 10-100 mV) data into 0-5 Volts using Arduino UNO

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