Member Since: March 18, 2009

Country: United States

  • These appears to be the same sensors that the Ambient Weather WS-2080 uses:

    They work and will probably last awhile for most applications. But they are not "rugged."

  • Interesting. Why not make a "studio quality" version with the Texas Instruments INA217:
    "Fresh from a comparison test against preamps costing $200 and $1500 - which it beat handsomely - the secrets of the $5 preamp are at last revealed."

  • The ATmega328 has a built-in temperature sensor on ADC line 7 (IIRC). But, the Arduino IDE doesn't support it. Nor, I have I seen any code that does. But, it's there.

  • This antenna has TERRIBLE sensitivity. Indoors, the Venus GPS cannot get a lock, even next to a large window. The magnet on it isn't even strong enough to hold it down.
    It is so bad SparkFun should not be selling it.

  • You'd need some sort of controller (like an Arduino) to configure the WiFly, "send the snapshot command" to the camera and then send the jpeg data to the WiFly. Raw jpeg data over a socket connection isn't terribly useful without something on the server side. So, you'd also need a simple server daemon of some sort to receive the data and save and/or display it.

  • Placing the Geiger tube inside a case will make it mostly insensitive to alpha radiation and inhibit beta radiation. If you cut a hole for the front face of the Geiger tube, it's dandy. But, it's not omnidirectional for alpha and beta.
    You'll want to get a radiation source to increase the number of readings. I recommend United Nuclear:
    This Geiger tube is well suited to have an isotope disk source placed directly in front of it's detection window. But, beware of maximum detection rates.
    Also, Nuclear Safety for kids:

  • "In practice, to avoid any residual bias resulting from non-random systematic errors in the apparatus or measuring process consistently favouring one state, the sense of the comparison between T1 and T2 is reversed for consecutive bits." --John Walker
    ie, measure the time between 4 counts and compare the length of T1->T2 to T3->T4, if the latter is greater, output one, if the former is greater, output zero, if they are the same, no output.

No public wish lists :(