My Hardware Designs

Hardware Designs

These are some of the PCB designs that I made during my free time and also for my PCB design class. (You can check my Github for design files).The EEG, Piano and USB-UART Converter PCBs were designed before learning best design practices. You can clearly see the difference in the PCB design.

The best design practices used were:

• Keep decoupling capacitors near the decoupled IC.

• Use continuous return plane for all the signals.

• Use less number of crossunders which will cut the plane.

Vital Sign Monitor - Project page 

The goal of the project  is to design and implement a device that monitors vital signs of a human body. Four major vital signs that the project focuses on are:

• Temperature

• Electrocardiogram (ECG)

• Pulse rate

The design comprises two separate devices connected to each other via Bluetooth Low Energy. The hardware board developed consisting of all the sensors will measure the vital signs while the application hosted on the PC  will collect information and show it to the user. The main user group that we target are doctors or trained professionals.

Golden Arduino Board

This is an adaptation of Commercial Arduino board, but with much better performance. Golden Arduino designed has almost 84% less noise than the  Commercial Arduino board. Many design practices were used while designing this board so that there will be less noise. The board also has extra ground pins (one for each pin) to create a fast return path for the currents flowing. I have made a detailed report about my observations and noise measurements done.

Switching Noise Board

This board was designed to learn about the difference between switching noise that happens when design practices mentioned above are followed and when it is not. One side of the board has a continuous ground plane while the Bad layout part does not and the ground is connected through long traces. I have made a report  about the analysis that was done using this board. The report has the schematic and measurements that I took explained in detail.

EEG Circuit

This circuit was designed to measure EEG (Brain waves :P). The size of the circuit is very small compared to other EEG machines and can be used as primary test.

Piano circuit (Standard)

This circuit replicates a piano and has corresponding notes. Designed using dimensions of standard components, the circuit will be an ideal personalized gift for your piano playing friend.

Circular Cansat PCB (SMD/Standard) 

The circular PCB was designed for International Cansat competition 2021. The board is small telemetry circuit with XBee integrated.  It is a combination of both SMD and standard components. Read about our team here ! 

USB-UART Converter(SMD)

The USB to UART convert boards are designed to program microcontroller from PC. The circuit was designed using SMD components.