Hari standing next to Science Fair Project

Free/Low-Cost Periodic Table Teaching Tool for the Visually Impaired

I am a student at Kennedy Middle ​S​chool in Cupertino, California and ​I am working on making a tool to help the visually impaired learn the atomic structures

I am a student at Kennedy Middle ​S​chool in Cupertino, California and ​I am working on making a tool to help the visually impaired learn the atomic structures for all the elements in the periodic table. ​ ​I am really excited to see if anyone would be willing to give me feedback. I would love for it to be used! ​ Here are the details of what I have been doing.

Electron Configuration

Valence Electrons

Tool to Teach Students about Atomic Structure

After that:

Lewis Dot Notation



Adapting the Tool for Students with Visual Impairments

I added a voice to ask the user to enter an atomic number. Then, using a braille keyboard, they can type in any atomic number. My product will, in return, read aloud the element name, atomic number, chemical symbol, group number, and electron configuration, and valence electrons. Though they can’t see the atom being drawn, using the information they heard, they can predict the reactivity and behavior of the atom! In addition, if there are any people with very low vision (such that they can’t see things on computer screens, but they can make out glowing lights), they can still see the bright LED’s on my breadboard that show the Lewis Dot Notation. This would give them a visual on the valence electrons, which might help them understand more about the element.

​The tool can immediatly be used anywhere with a computer (except that the LEDs would’nt work). Also, if there is a braille printer in handy, the atomic model that is drawn on the screen can also be printed for the visually impared to see. In addition, even the complete solution which also includes a computer (Raspberry Pi) and LEDs i less than $50, and my parents would be happy to donate it. I think this would be a great opportunity for the visually impaired students to learn, just like I d ​o!​ ​

I would love to meet students who would be willing to try out my tool, so I can take their feedback and improve it!

I developed all this on Raspberry Pi and it is a very compact, low-cost tool.

  1. I used braille stickers so that my keyboard can be used by the visually impaired (Seen in video).
  2. If there is a braille printer, the atomic structure that is drawn can also be printed besides being heard.
  3. The valence electrons can be heard with beeps as the LED’s light up (Seen in video).
  4. If the Raspberry Pi is used, the LED’s can also be seen by the low vision students (who can see the difference between light and dark, but can’t see specific details).
  5. Everything except the LED’s can be made a free, web-based tool.
  6. Even with the LED’s, this is a very low-cost (less than $40) tool including a complete computer (Raspberry Pi).

By Hari Bhimaraju

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