Beginning to Play with Switches

Switches on Switches

I create a simple switch control. There are three switches that each individually control their own LED (red, green, yellow). The schematic is shown below.


Green LED




Yellow LED



All Three LEDs lit up


Close up



PComp Simple Switch Video from Jesal Trivedi on Vimeo.


Further Thoughts

I wanted to try to see if I could create just one switch that made the light jump from one LED to another, sort of like Christmas lights, but I couldn’t figure out the right amount of resistors and power needed to do something like this. This might be something to consider in the near future, possibly with some Arduino programming.


Thoughts on Reading

Don Norman’s The Design of Everyday Things has been one of my favorite books on design. I’m happy that I read the second article on emotions and attractiveness of designs, that Norman ALSO wrote, because that was a criticism of his work that I had previously. I thought Don had a utilitarian view of the world and how products should be designed, so after reading both, I definitely see more balance between his thinking.

I discussed affordance in my last blog post as something that is critical for good interactivity. Your product has to be designed in a way so that the user understands what needs to be done in order to use it. He used a door as a fantastic example to explain this and the concept of ‘visibility’, and how it can go wrong in design. The can also be seen shopping cart

Mapping was another interesting topic (especially since we are learning how to use this function in ICM!). I liked how he distinguished between additive dimensions (adding more of something to show incremental increases) versus substitute dimensions (replacing something of one particular value for another to make change). I kept thinking of color and how it can be both an additive and substitute dimensions. For example, if you are showing the prices and higher prices are indicated with yellow, orange and eventually red, and lower prices range from yellow, to green to blue, you can map color to prices and it can serve an additive utility.

It was fascinating seeing the other student’s projects. I recall seeing some of them when I visited during the Winter and Spring ITP shows over the past couple of years. I do agree that you can add your own spin to the projects. Motion, LEDs, and ‘FIELDS OF GRASS’ are particularly interesting, but I’m excited to see what we can come up with here in this class. I’m curious to see if any of the past projects have been based on actual product development rather than installation designs, which most of the projects that I noticed, are.

P.S. Now I want some teapots!