Recent content in James Wu on Analogist

 
 
 Background 
 Quickstart 
 
 Inexpensive wall-power solution 
 On-the-go battery-powered solution 
 
 
 Noise Testing USB Power Supplies in 5V DC mode 
 
 Test setup 
 Test results 
 
 
 Discussion 
 
 
 
 Background 
 A group of us (Covid-cautious companions in the Seattle area) have recently acquired…

 
 
 How do I find out how bad the wildfire smoke is in the US? 
 
 What if I don’t live in the US? 
 What do all the colors mean? 
 What do I do if the air is bad? 
 Can I see data even faster than the US EPA Map? 
 
 
 Where do I find future smoke forecasts? 
 
 Are there additional hour-by-hour forecasts for other US locations? 
…
The implant 
 Recently I was implanted with a wireless capsule to monitor stomach pH (specifically, the Medtronic “Bravo Reflux Capsule” ). It’s a sensor that’s temporarily attached to your lower esophagus, in order to measure the pH in-situ. This is a pretty common procedure ever since it supplanted the previous gold standard of cathether-based ambulatory pH…

 Not a very good password storage system 
 
 

 When you log in (“authenticate”) yourself to somewhere using a password, that password has to be stored, in some form , on the other side. Usually this is in a server: whether it’s Facebook, Snapchat, Yahoo, or shop-rare-trinkets.com, the server have to have a saved copy of that password. Otherwise, there would…

 Amplified EEG. Mark Stone, CSNE 
 
 

 This piece was written by James Wu and Dr. Rajesh P.N. Rao at the University of Washington for The Conversation . It has since been featured in Scientific American and Smithsonian Magazine . 
 Just as ancient Greeks fantasized about soaring flight, today’s imaginations dream of melding minds and machines as a remedy to the pesky…

 

 The true potential of noninvasive neuroengineering is still waiting to be unlocked. Unfortunately, no existing implementation of a noninvasive neurotechnology - one that doesn’t break the skin - yet provides the value required of a consumer facing product. This shouldn’t stop you from pushing forward, but in the following methods, let’s examine the common…