This document describes the design of a low-cost heart monitoring system. It discusses two methods for measuring heart rate: electrocardiography (ECG) and using an optical sensor. The system design uses discrete components like resistors, capacitors and the TL084 instrumentation amplifier IC. The Livewire and Eagle software are used for simulation and PCB layout. Troubleshooting tips and potential improvements using a microcontroller are also provided. The goal is to create an affordable device for home heart rate measurement.