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Before putting the AC coupling on the output, the amplifiers are working. Without the 2nd stage, the output is only 80mV. The reason I added the AC coupling DC bias level at the output is because, when I increase the gain at AD620, the signal gets shifted down further to the negative side...
So basically the AC coupling that I designed is correct ? Or is it a High Pass filter from the the first stage.
I am well aware that the DAQ has no problem with negative input signal. However the problem is that as I increase the gain, the Vpp did not increase but rather, it shifts down the...
My supply input for this experiment was +/-4.5V and +/-9V.
I am adjusting my gain at the Instrumentation Amp with the 10K pot. I also experimented with increasing the gain at the second stage, but that didn't work too.
My frequency is 150Hz.
I have managed to design a circuit:
that is able to read an ECG signal where the signal is then acquired through a DAQ called TiePie. From there, the signal is then digitally processed (HPF,50Hz removal,etc), through MATLAB. Everything is fine. However the problem now is that when I tried to...
Alright guys, I finally build a portable ECG device where by the ECG signal will then be sent to Arduino UNO where the data will be transmitted via Bluetooth and the waveform will be displayed on Android Phone. I've already built a circuit and have a good waveform. I also managed to successfully...
Hi guys,
I managed to get an ECG signal with the circuit.
Attached is an Image of my output signal.
Right now what I would like to do is to transmit the analog signal into digital signal through Arduino UNO where the data can then be analyzed and process further in MATLAB.
How do I go...
Hi,
Right now, I am designing a hardware circuit to read the ECG signal where the output signal will eventually be read by n oscilloscope. I have already build the circuit, using AD620 as the IA and OP177 GPZ as my op-amp. I am referencing my circuit from this website ...
Hey there,
Im from singapore, and ordering the book will take a long time just to reach here. Is there any websites that you can recommend me or you can personally help me with the codes ??
Hi guys, Im a student new in the fields of programming. I was asked to program an electronic combinational lock on an explorer 16 development board. The software that im using to compile is MPLAB ICD 3. The microchip is PIC24FJ128GA. I have been going to the library, googling in the internet...
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