Here's some basic info on how to use the ECG functionality of your card10## Finger ECG![Top View Harmony Board](top_1-4.jpg"Finger ECG and Pulse Oxymeter")Your card10 comes with a number of fun things to play with - 1 : Contact, negative ECG electrode - 2 : Pluse oxymeter (can [potentially, if at some point supported by software] measure pulse and blood oxygen levels using an optical sensor) - 3 : Contact, negative ECG electrode (again) - 4 : Screw (also works as a negative electrode, see )![Bottom View - ](bottom_5-6.jpg"COM for Bias and positive electrode for finger ECG") - 5 : COM (for bias) - 6 : Contact, positive ECG electrode ![Side View Details](side_front_7-8.jpg"Pin and isolation") - 7 : Pin for soldering/stitching an alternative electrode, if you don't want to use (6) - 8 : Plastic distancer, works as an isolation (see )## USB ECG - see [ECG Kit Assembly](../ecg_kit_assembly/) on how to solder your ECG cable - NB: it DOES matter how you connect the kit via USB. if you get a lot of noise, try to turn the connectionHave fun experimenting with the ECG.