treehouse

Member Since: March 14, 2011

Country: United States

Profile

Bio

CEO, Treehouse Lab, manufacturer of natural wood finishes, other fun stuff.

Spoken Languages

English

Programming Languages

PHP, C++, SQL, Postscript

Associations

Vanduino project lead.

Universities

NMTECH, Socorro, NM Univ of Calif, Los Alamos

Expertise

Arithmetic, hand tools, dish washing, web design, classical history, slave robots

Interests

Automation, new business models, mobile living

Websites

treehouselab.com

  • Product SEN-09848 | about 3 years ago

    Can someone point me to a tutorial on how to upload new firmware to this board?

  • Product SEN-09848 | about 3 years ago

    Member 115862,
    My above conversion factor of 0.00812 uSv/h/CPM based on tube’s Co60 specs is about 6.5% higher than your lab data based on Cs137. Your data gives a factor of 0.0076 uSv/h/CPM. Can you tell me a little about the provenance of this data?
    Also, I have a Windows XP console program that puts out a table of CPM, uSv/h, uSv cumulative, elapsed time, etc., for Sparkfun geiger. Can select various formats, beeps, sample rates from command line. Email me and I can send you the C code and .exe. mike@treehouselab.com

  • Product SEN-09848 | about 3 years ago

    Maybe I am missing something here. Could someone check my conversion?
    For the ND-712 tube used in the Sparkfun geiger counter, we know the dry air dose rate for Co60 gamma response:
    18 CPS/mR/hr
    Therefore: 1080 CPM = 1E-3 R/hr;
    Given 1 R = .00877 Sieverts,
    then 1 CPM = 0.00812 uSv/hr
    Does this makes sense for a conversion factor? What are people using?

  • Product SEN-09848 | about 3 years ago

    I just bought 2 of these. Out of the box, one reads 30% less CPM than the other. I am getting an average 14 CPM out of the high one, for 60 sec sample periods.
    Also, the conversion factor I keep reading of 0.00233 uSv/hr/CPM, can anyone show how that is derived from the LND-712 specs?

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