January 13, 2013

Name the Thing Contest – 217

    The prize this week is a breadboard power supply. This contest will run for one week (January 13 2013 – January 18, 2013). Ending time is based on central standard time. To enter, identify the item above and what it can be used for. Please do not give the answer in the comments. Send an email to contest @ hackedgadgets.com with “Name the Thing Contest” as the subject,

DIY Gamma-Ray Probe

  David Prutchi has just put together a DIY Gamma-Ray Probe using a Philips XP5312/SN photomultiplier tube and a piece of scintillation plastic. A paint can was selected as a nice solid enclosure, the tube and plastic are supported by some foam on the inside to protect them from damage. “The probe yields a background count of approximately 1,000 counts/minute (cpm) in our lab, and 7,400 cpm from a 137Cs