Författare: jenslabs.com
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DIY IR-filter
Almost all digital cameras are sensitive to both visible light and infrared light. To prevent images to be contaminated with IR-light camera makers install an infrared blocking filter in front of the sensor in their cameras. The filter blocks out almost all IR-light but since it doesn’t filter out 100% of the IR light it is possible IR photographs…
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Sensors
There are a bunch of different sensors out there, based on price and sensitivity I have chosen to buy two different sensors the TGS822 from Figaro sensors and the MQ-3 from HANWEI ELETRONICS. If i wasn’t on a budget I would also have ordered a WSP2110 – air polution detection since I believe that a combination with on of the TGS882…
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Expected aceton concentration
After doing some Google searching I found several different studies on the concentration of acetone in a persons breath and here I will look in to some of them. Study 1 I found a Study published in the paper ”The American Journal of clinical nutrition” where the concentration of breath acetone was measured after every hour for…
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What am I looking for?
Based on Steves posts it looks like it is actually possible to detect if a person is in a ketose state or not by analyzing that persons breath. But what are the signs of ketosis? After doing some researching on Wikipedia I concluded that what we are looking for is acetone. Properties Molecular formula C3H6O…
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Steve’s newsgroup post
Steve also published a post at a newsgroup were he presented some more details about his ”KetoFlute”. He also included a picture of his creation. Date: Jun 12 2012 21:12:02 Gang… I’ve been silent for the past week while I’ve been pushing to get a prototype ketone breathalyzer finished I’ve never worked with USB at the…
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Ketone detector – First research
This all began when I heard of Steve Gibsons work of building a ”KetoFlute” and I decided to look in to if I could build one as well. I use this blog as a note book for my initial research. From what I have found Steve talked about his ”KetoFlute” twice at the Security now! podcast.…
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