ECG signal from a simulator

Today I get the Phantom 320  ECG signal simulator from my lab. I will use it to test my hardware which called ArmBrain from now (Arm stands for the ARM micro controller; Later, if ArmBrain is used for BCI application, Arm also stands for users' hand).

ArmBrain Kit (TI daughter card is on the left; STM32F4 Discovery is on the right; The red board is the FTDI board)

ECG signal simulator

My setup: Left Arm(LA) and Right Arm(RA) signals from the simulator are connected to differential inputs of ADS1299 Channel 1. The Right Leg reference signal is connected to Bias electrode of the ADS board. Below are the graphs of data which I collected.

ECG signal from simulator collected by ArmBrain (3 wires set up)

I unplug the RL reference signal to test the output voltage graph without reference. It's noticeably noisier.

ECG signal from simulator collected by ArmBrain (2 wires set up - no reference)

The ECG signal simulator is a good tool to study and test bio-signal circuit.  I'm lucky to have it with me. If you don't have it, you can build one with Arduino kit.