Portable Data Logger for Long-Time Storage of Bio-Signals Implemented with an Auto-Range Amplifier and an Analog Multiplexer

The main goal of this project was to design a Portable Low Voltage Amplifier in which the amplification level is based on the signal strength being detected and was implemented with the use of analog filter, operational amplifiers and an analog multiplexer. Using this device, a portable data logger was constructed with the use of an Arduino microcontroller. The ultimate purpose of designing and fabricating this device is to a have a portable data logger to capture bio-signals for different applications. In particular the device will be used to capture the heartbeat of mollusk in the field.