Paisa Stick- A tangible cashless payment interface

IDC IIT Bombay India

This project was done during Masters at IDC. The project was selected as winner in student design category at CHI 2017 in Denver, Colorado. The paper on the same has been included in conference proceedings and can be read here. The team members were Udayan and Silpa.

The competition brief can be read here.

We chose to work on how might we help the elderly and digitally illiterate perform cashless transactions. The recent events of demonetization helped in setting up the premise for such a solution. Our main contribution was conducting several studies to try and understand the conceptual model elderly have towards performing such transactions.

The design process is covered in the video below :

Product renders by Nikhil with hopes to support braille Imgur

Scenario of particular payment instance Imgur

What happens if the device value diminishes Imgur

What happens if it gets lost Imgur

Stages of prototyping Imgur

Working prototype demonstration

At CHI Poster Presentation

The Artefacts


The detailed paper can be read here.