What is your favorite thermometer?
jefm
Posts: 50
I've been looking at thermometers for an upcoming project, will probably be using a dozen or more.
The DS1620 that comes with Stampworks is really cool. You can program some pins to go high if the temp goes outside a setpoint, so you can have a whole 'nother safety circuit that will work no matter what the Stamp does. Uses a lot of pins though and many thermometers can lead to an I/O intensive project. (plus the DS1620 isn't available anymore?)
The DS1820 is smaller, a little cheaper, and has that 1-wire thing, so with an interface to the stamp you can have several thermometers on a pin. Seems simple enough, I'd miss the safety circuit thing but who knows if I'd take the time to figure it out anyhow :}
Are there any others I should be looking at? Thanks for any help!
jefm
The DS1620 that comes with Stampworks is really cool. You can program some pins to go high if the temp goes outside a setpoint, so you can have a whole 'nother safety circuit that will work no matter what the Stamp does. Uses a lot of pins though and many thermometers can lead to an I/O intensive project. (plus the DS1620 isn't available anymore?)
The DS1820 is smaller, a little cheaper, and has that 1-wire thing, so with an interface to the stamp you can have several thermometers on a pin. Seems simple enough, I'd miss the safety circuit thing but who knows if I'd take the time to figure it out anyhow :}
Are there any others I should be looking at? Thanks for any help!
jefm
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Tracy Allen
www.emesystems.com
Basically area temperatures; temperatures of rooms in a house. I guess 50f to 100f, and that's pretty extreme even.
The DS1820 too has been superceded by the DS18B20, which also gives higher resolution.
For either of these sensors, the PBASIC code is similar to the older version, but not exactly.
It is true you could make the wiring much simpler with a One-wire chain. It will need a pullup resistor at the low end of the range so that the signal will not be degraded by long wires. If you are setting up a network of one wire sensors, the code is simpler if you find out the unique address of each one before you install it in the network. The commands that automatically identify sensors on the network are more complicated, but a nice thing to have if you want to plug in more sensors and have them automatically register with the network.
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Tracy Allen
www.emesystems.com