How do you make cheap ecg electrodes?

Cheap ECG electrodes can be made using conductive materials like silver/silver chloride paste on a substrate such as medical tape or adhesive fabric. To create the electrodes, apply the conductive paste to the substrate and allow it to dry, ensuring good adhesion. You can also use conductive gel or saline solution to enhance conductivity and skin contact. Ensure that the electrodes are properly cleaned and prepared before use to maintain accuracy and reliability in ECG readings.