Intro: Portable ECG (using OLED to Display the Signal)
Hi, i'm working on a portable ECG , EKG, see all steps...
Step 1: The Design, the Circuit the Summary
If there are any error in the description, please leave me feedback, thanks
Hi, I'm working on a portable ecg, EKG , the idea is to make a low cost ecg visualizer device that can be powered by 3.7 batteries
The circuit has three filter, lowpass, highpass and notch or stopband filter, also the instrumentation amplifier is used, after this one the signal goes to the filters. then the signal is sampled by the msp430 uc, and then the values are send to the esp8266, I was planning to do all in the ESP but the board that I have dont have any pins connected to the adc and I have not a I2C adc IC.
More info feel free to comment , since I dont make this one as a special entry for instructables, so pardon me for the lack of information. but again feel free to ask.
Step 2: The Analog Signal
This is the result of the filters and one lead configuration of the three lead standard.
Step 3: Adding the Digital
Some 60hz noise and some visuals of the signal on the oled display
Step 4: The Pcb
This is the smd pcb that I did, one problem in the design make this one totally useless, well the signal is good after the first filter then is mess up
The box will containg the whole device, by now i have to fix the pcb :/