Sensor circuit!

After i have finish my standalone arduino, I would like to construct my sensor circuit which contain amps like LM358 and filters..But before that, i have tested my standalone arduino and it works great!..There's no short circuit or malfunction...

Etching, Drilling..

This part of etching and drilling is very tricky part...I have to do it carefully..In this section, I have choose UV pcb board for my standalone arduino because it is much easier than the usual one..This UV only takes 5-10 minutes to complete all the process compared to usual one which takes about an hour to do it..So here's the pictures of my etching and drilling...Enjoy!

UV Box

1 minute trace

Trace visible place

Trace become visible

Oh yeah!

All the components are ready to be constructed..So, starting with my standalone arduino..I do it first..Before this I have attach the sketch of my standalone arduino, so that's how I construct it..Let's go to the construction!!!!!!!!!!!!!!!!!!

Components

 

 

 

 

Components

Receipts

Jalan Pasar

Today is "Jalan Pasar" Day because i go to Jalan Pasar to buy my equipments..hehe..
So, what are my requirements?..All the components listed before this is very important..So, I have decided to build ECG circuit using LM358..I buy all the components such as resistors and capacitors for my band-pass filter..So, see you in Jalan Pasar!

Examples of ECG circuit

As I search the web for ECG circuit, I have noticed that there's a lot of ECG circuits that has different types of equipments they used..So, I've decided to take some of them as my references...

• AD624

•  LM358                                                  

Amplifiers?

As we know, ECG needs lots of filter in order to get a very smooth and nice signal..But in my case, I would like to produce digital signal for my ECG which means that there is no analog signal like we see in hospital..
So, I have to build amplifiers and filters circuit so that i can produce the digital signal of ECG graph..There are several types of amps that I would like to use...I just need time to choose one of them..Here's my amps :-

• LM358N
• INA128P
• AD620
• LM324
• AD624

That's all the amps that i will choose later..By now, I have to search for a simple ECG circuit in order to build it as my sensor circuit..

Stand Alone Arduino..

                  During my previous blog...I have mentioned that i am going to build a standalone arduino for my FYP...This standalone arduino can act as arduino and it is more cheaper than the real arduino..
                   So, before i go and buy all the equipments, i have to design the circuit for standalone arduino first..This sketch is made from DipTrace software and it is going to be printed on OHP paper which then i can trace it on my UV PCB board...This is my example of standalone arduino.. :-

StandAlone Arduino