Smart meditation

Inspiration

Help people (mostly for student) to meditate that also loves data driven methods to help them active their goal.

What it does

It uses a IR sensor to measure the heart rate and it will find out if the user stressed if the user is stressed the app will platy a video and audio to calm and reduce the the heart rate and brpm.

How we built it

For the electronics we are using an IR sensor, and two cascade operational amplifier circuit with a band-pass filter (composed of a passive high-pass filter and an active low-pass filter). What we are aiming with the circuit is creating an IR sensor that only detects higher frequencies such as the heart beat one (around 2.3Hz). We have cascade it in order to amplify even more the signal and have more reliable heartbeat peaks that can be processed through the code easier. To control the circuit we have used an ATmega644P programmed in C that connects by a serial interface (UART) to PuTTy) so we can display the hearbeat and the bpm.

Challenges we ran into

We had an issue getting the data from the ilMatto to the app to resolve this we used a raspberry pi and a serial Bluetooth connection to talk to the app, also we couldn't get a 32x64 LED display correctly working with the Raspberry Pi to display calming effects.