alternatasha a site to catalog random projects

alternatasha
Archive for January, 2012
temperature sensor
temperature sensor

It’s winter time, and I need to monitor temperature throughout my place.  I had an extra Maxim DS18B20 “One-Wire” digital temperature sensor.  This can easily be read by any arduino-type microprocessor board.  I decided to use the Seeeduino Stalker for the task.  WIth its numerous digital pins, it made sense for me to hook up […]

removing a cast iron fitting
removing a cast iron fitting

This steam pipe ran into the wall and stopped there.  It had no purpose, and I needed to install a main vent somewhere on that line.  Too nervous to tap a hole in its typical spot (at the end of the main), I decided to use this unused pipe at the top of the riser […]

main vents for steam heat
main vents for steam heat

These cracked radiator vents, labelled “USAV 880B,” were masking an even greater problem in the crawl space — no real air elimination vents on the mains.  The one that was located on the southern main, turned out to be an old Hoffman #43, a convector air valve, not a mains one.  Who knows how well […]

home heating index
home heating index

How efficient, in terms of heat, is your home? The Home Heating Index (HHI) is a simple calculation that gives you a number with which to categorize your home heating efficiency. A simple guide here takes you step by step through the calculation.  Basically, you find the ‘Heating Degree Days’ (HDD) for your area here. […]