Understand the inner science & tech of your gadgets with me, a Carnegie Mellon alumnus. Join 170+ readers every other Wednesday to see the world differently in just 3 minutes—regardless of your background! 🚀
Hey friends, Happy Wednesday!
Last week, I celebrated my Dad's 60th birthday in a town with some of my relatives.
Last week, I asked a few questions for you to answer so that I can drive the newsletter in a direction that’d benefit everyone. Thanks a lot for filling them and here are the results.
There are some changes and new subsections I’m introducing next week, thank you again for engaging with my newsletter and for your constant support!
I aim to write my newsletter issues in a way one can follow them while traveling on a bus, having a coffee, waiting for your food, etc. Let’s jump in!
The accelerometer sends out acceleration data along the 3-axis (X, Y, Z) of the fitness watch. The acceleration and jerk (rate of change of acceleration) are measured. If both their values are beyond a threshold, then the fall detection algorithm begins!
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Helper - All the terms in double quotes below refer to the blocks in the Figure 1.
What is Sensor fusion and what does it do? What other gadgets do you think use sensor fusion? Share your thoughts by replying to this email, and we can have a discussion. This is the topic for my next week’s issue by the way.
I’ll send you my full blog post S1E8 on Fall Detection after we discuss Sensor Fusion and the basics of Feature Extraction next week so that it's readable. I’m thinking of writing about one of the following - an electric toothbrush, sleep rate sensor among a few other options on my mind for the next episode S1E9. Also, let me know if you’d like to read about a specific gadget/device.
Have a nice rest of the week, and take care!
Until next Wednesday,
Chendur
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Chendur Singaram - One Gadget at a Time
Understand the inner science & tech of your gadgets with me, a Carnegie Mellon alumnus. Join 170+ readers every other Wednesday to see the world differently in just 3 minutes—regardless of your background! 🚀
Hey friends, Happy Wednesday! Last week, I hosted dinner for a couple of friends at my place. Let’s look at how fingerprint scanner works this week. I aim to write my newsletter issues in a way one can follow them while traveling on a bus, having a coffee, waiting for food, etc. Let's jump in! Here is a simplified version of the complex process of fingerprint reading and registering. How it works: 15-second answer Fingerprint technology uses the distinct ridges and valleys on our fingers for...
Hey friends, Happy Wednesday! Last week, I went to the birthday party of my first cousin once removed. Let’s look at how a TV remote works this week. I aim to write my newsletter issues in a way one can follow them while traveling on a bus, having a coffee, waiting for food, etc. Let's jump in! How it works: 15-second answer When a button is pressed, your TV remote emits infrared light pulses from an LED. Each button press sends a unique series of light pulses (using light ON and OFF),...
Hey gadgeteers, Happy Wednesday! Last week, I tried Escape Room experience with a couple of my friends for the first time. Let’s look at how Breathalyzer (Alcohol detector) works this week. I aim to write my newsletter issues in a way one can follow them while traveling on a bus, having a coffee, waiting for food, etc. Let's jump in! How it works: 15-second answer Breathalyzer technology measures blood alcohol concentration (BAC) by analyzing exhaled air. After drinking, alcohol is absorbed...