For the basic pre-built EKG circuit built by the teacher:

• 4 - 10k resistors
• 1 - 10k variable resistor
• 1 - 39k resistor
• 1 - 47k resistor
• 1 - 100k resistor
• 1 - 220k resistor
• 2 - 470k resistors
• 2 - 1M resistors
• 2 - 470pF capacitors
• 1 - 1uF capacitor
• 1 - 2.2nF capacitor
• 1 - 4.7nF capacitor
• 5 - 741 op amps
• 4 - electronic project boxes
• 1 - breadboard
• Plus an oscilloscope, power supply, electrodes, wires, etc., as described in the EKG Diagram with Instructions
• overhead projector, to go over handout answers with the class

Most components can be found at Jameco at www.jameco.com or RadioShack at https://www.radioshack.com.