Archive for September, 2015

I just found these :

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it looks like it’s accurate to +-15%

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There must have been a weekend chinese food festival at South Bank in London over the weekend.

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The recreation ground by our house

It looks like the majority of “dust” in our house is in the 2.5um range

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The particle sensors sensitivity is quite impressive – see the following graph

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The spike around 06:00 is me getting up and spending 5 mins in the living room!

The spike around 19:00 is my wife lighting a piece of paper in the living room fire for a minute or so.

I think the sensor is working!!

This is a pretty interesting project – even for a home. The use of long distance checking of inexpensive RFID sticker to track tools and other items :

 

Long Range UHF RFID Item Tracking System – Hackster.io: “Long Range UHF RFID Item Tracking System © GPL For makerspaces to keep track of tools and other items. Tag items with inexpensive RFID tags and track their physical locations.”

(Via.)

Just to test the particle sensor I blew smoke from a match in front of the sensor – and it worked – to at least is did show up very clearly.

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A enormous spike.

A long awaited new book from Glyn Stewart has just been released :

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and I’ve just bought it.

Really like this one

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and it’s available at our local Waitress!

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