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  • in reply to: Opensource KIT1 firmware #28584

    Thank you! Come what may, I have saved it now as PDF 😉
    In the meantime, Wolferl helped me with the recompiling of the modified source code
    (for my STS-1 tube).

    in reply to: DIY KIT1 v102 – Unit voltage on GM tube is too low #28469

    The low 15V tube voltage is also displayed on-screen (KIT1 screen, not multimeter).
    I have measured R3 to ground: 8.5 Mohm. R3+R5 to ground: 17.2 Mohm (with the tube in circuit).
    I suppose M1 has only 2.7V because I use 2xAA batteries to power the kit.

    in reply to: DIY KIT1 v102 – Unit voltage on GM tube is too low #28463

    While I’m waiting for help for compiling/modifying the firmware for my STS-1 tube (practically identical to the SI1G already defined in the code), I’m troubleshooting the high-voltage stage. I’m using firmware made to work with the SBM-20 tube while I have a STS-1 version, but I don’t think that is the reason for having such a low voltage – 15V on the tube!
    I took some measurements with the oscilloscope. Could it be the MPSA42 transistor? Or the 2N2907 transistor?
    The coil is a quality 2.2 mH, very low resistance, not the green version that looked like a resistor.
    Any ideas? Can someone measure same test points on their units?

    in reply to: Opensource KIT1 firmware #28431

    Thank you so much, Wolferl! I will send you the modified source code.

    I would love to read that tutorial too, when it might resurface.
    I started this project because I want to familiarize myself with both
    programming in general and microcontrollers in particular, so I chose
    something that interests me.

    in reply to: Opensource KIT1 firmware #28427

    Can someone be kind enough and post a short tutorial on compiling Kit1 source code on a Windows machine?
    I have Atmel Studio 7 and AVRISP MkII programmer, but I’m willing to use AVR Toolchain if that’s
    what you guys used.
    I have modified the source code to use my tube (STS-1, not a particularly sensitive tube but that’s what
    I had on hand).

    There was a tutorial on this page:

    but not anymore. Wolferl, the author, no longer has it and Radu is busy right now, so… maybe
    someone saved it and would be able to post it here as a PDF or something?…
    I have finished constructing the device (PCB completely redesigned to fit my enclosure), and I’m barely
    waiting to compile the code and get it running!
    Thank you so much!

    in reply to: DIY KIT1 v102 – Unit voltage on GM tube is too low #28420

    Hi Wolferl!

    My mistake… I meant the internal voltage measurement is 15V, as it is shown on the LCD.
    The LCD is powered at 3V (2xAA batteries).
    I have replaced the small axial inductance (2.2 mH, 32 ohms) with a larger, ferrite-core one (2.2 mH, 3 ohms),
    but the voltage remained the same.

    in reply to: DIY KIT1 v102 – Unit voltage on GM tube is too low #28406

    Tuxik, could you please elaborate on the problem? Ițm having the same situation here (15V on LCD, 8V measured across the tube).
    Thank you!

    in reply to: KIT1 Feedback #3954

    @Radhoo, thanks for your benevolence; it was not my idea, I just quoted from your #3932,

    <<As said, it was a “competition, for all those that post their construction here. We’ll have some voting in place, and the nicest build wins a model A2 detector. DIY units go as well.”>>

    Seems like I misunderstood that quote. I’ll look forward for future chances to win a nice kit! It’s really great that you are offering this to us!

    in reply to: KIT1 Feedback #3951

    Congratulations to ecloud, the winner!

    Reading post #3932, I’m a BIT conFUSEd. It is mentioned a random selection but also a competition that decides a winner based on voting. Is that coming up?

    in reply to: KIT1 Feedback #3933

    My DIM (do-it-myself 🙂 version, still under development. I’m using a very sturdy Gainta enclosure for portability. I hope that my personal touches would not disqualify me from this contest!
    The protective window has a narrow overlapping edge (grinded by hand, just like the opening hole) that prevents it from falling inside, should it be pushed hard from the outside (it would be glued anyway). The very edge of the edge will be chamfered to fit more snugly with the front panel.

    I have recently dropped the idea of using the 8-pin connector of the LCD board; the LCD will use the 4 thick but pliable copper wires not only as a precisely 3D-adjustable support but also as electrical connections, together with another 4 flexible wires that will connect to the main PCB in various points – that would simplify my PCB design a lot (the enclosure is quite spacious, the PCB not as much).
    The power switch is mounted on the side, under the enclosure’s shoulder, to protect against accidental flipping.

    The center metal button has a white LED inside, that will blink in unison with the sound from the internal speaker. This button and LED will have internal counterparts (selectable via jumpers), to allow testing without having the cover in place.

    in reply to: Unlawful data collection forbidden in Wyoming #2931

    I think someone overreacted. I’ve just perused the bill posted in the first LEGISCAN link (which looks like a draft anyway) and found this definition:

    <<“Collect” means to take a sample of material, acquire, gather, photograph or otherwise preserve information in any form from open land which is submitted or intended to be submitted to any agency of the state or federal government;>>

    So, as long as you don’t collect data with the intention of submitting it to the government, you’re good to go.

    This link looks like the final form of the law:

    which says:

    <<“Resource data” does not include data: […]
    (D) Collected incidental to a recreational activity or educational activity done with statutory, contractual or other legal authorization to enter or cross open private land and the data is not used for legal or regulatory proceeding.>>

    So I guess you can take photos again while hiking. Who knows, maybe even smuggle a thermometer in your tent.

    Razvan N.

    in reply to: Hardware Conversion Factor #2923

    Hello, Radu!

    I’m building a portable one based on STS-1 (that’s what I had nearby). I already have all the parts, I’m working now to position parts on the PCB
    that suits my case (Gainta 828G-S-BC).

    I know that you have used the same model on your previous prototypes, can you please tell me what factor to include in detectors.cpp? I will add STS1 in detectors.h too (at number 9).

    This particular prototype would not be used online. When I would decide to become part of the community, I will use a tube that would allow uniformity between my measurements and the rest of the network.

Viewing 12 posts - 1 through 12 (of 12 total)