Olimex active/passive electrodes

trishhtrishh Singapore
in Electrodes
Hi, I have been trying to use olimex electrodes with cyton board to display real live data. 

At first I tested if it can detect ECG data but for both types of electrodes, it doesn't seem to have a clear ECG signal, in fact there is some noise in the signal. (I use passive electrode as reference , SRB and use my bare hands for contact in the electrodes)

For passive , I connected the GND wire with the AGND of the cyton board and the output to the cyton channel. This is how it looks like:

image


For active, I connected the GND wire with the AGND of the cyton board , the +5V from the active electrode is connected to AVDD of the cyton and the output to the cyton channel. (AVDD to GND is 2.5 V). This is how it looks like: (I'm not sure where that noise comes from?)


image
At first, I thought the active electrode need 5V for the power so I connected another hardware (Voltage regulator) that is able to supply +5V but there are no improvements on the signal as well and from previous forums, it says the power of the cyton board should be enough to get a clean signal. 
I'm not really sure of what the problem is, is it the way I connect the electrodes to cyton or something else?(I'm sorry if I sound clueless , it's because I'm new to using openBCI or EEG in general )


Any replies would be great, thanks in advance!

Regards,
Trish 

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