cheap ds18b20's, are they legit??

[Heckler]

YEP!! they are all reading very close to each other...
Below is a sequential read of nine sensors that are all in parallel on a bread board:

1 TempC = +25.1250 C
2 TempC = +25.2500 C
3 TempC = +25.1875 C
4 TempC = +25.1250 C
5 TempC = +25.625 C
6 TempC = +25.625 C
7 TempC = +25.625 C
8 TempC = +25.625 C
9 TempC = +25.0 C

I modified Bruces code that is posted on rentron. First I read each serial number and made a note of it as I placed it in line on the bread board. Then I did a For/Next read of each sensor and displayed the temp using debug.

I also sequentially touched each one with a hot soldering iron and watched just that sensor change in value confirming that I, indeed, was reading each sensor.





If anybody is interested in my test code... I would be happy to post it. I used a 16F690 on a Microchip LowPinCount demo board with pickit2. You can see all nine sensors lined up 3 x 3 on the breadboard.