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  • April 16, 2016 at 8:04 pm #2867
    Dave K
    Participant

    Hi,

    Would it be possible to tap into the pulses coming from the tube, as to add a clicker sound to the Radiation Monitor A3.4 ? I would like the device to click on each incoming particle.

    What I would like to know is which point in the circuit (if any) can be used to connect to a simpel amp to drive a piezo.

    Thanks!

    Dave

    April 22, 2016 at 8:40 am #2868
    uRADMonitor
    Keymaster

    Hi Dave, this is a nice question and the answer is YES.

    The PCB’s have been designed with a connector where you can add a clicker. See it in the picture attached.
    I recommend the self oscillating 3V piezo buzzers. Here’s an examples:
    http://www.ebay.com/itm/Black-3V-Electromagnetic-Type-Piezo-Buzzer-Continuous-Sound-Pack-of-20-/271455683312?hash=item3f340502f0:g:b9wAAOSwu4BVyxYp
    You will also need a firmware upgrade, as by default the digital output pulses on that connector are disabled.

    Radu

    Attachments:

    1. uradmonitor_model_A_add_speaker.jpg

    June 20, 2021 at 4:35 am #28907
    Klaverblad Hoevelaken
    Participant

    Old topic, I know, but would a (weather-proof) LED also be possible?

    June 21, 2021 at 10:10 am #28908
    uRADMonitor
    Keymaster

    hi Rob, are you asking for a way to modify an existing unit or is this a question/suggestion for a future hardware revision?

    Thanks,

    June 21, 2021 at 10:37 am #28910
    Klaverblad Hoevelaken
    Participant

    Hi Radu,
    In my case it would be modifying an existing Model A3.4, if possible.
    As some kind of “in-service” indicator. (thus flashing instead of making the clicking-sound)

    Unfortunately the link to the eBay listing is a dead-end as it is too long ago and no history shown, so I can’t see the technical details (impedance, load etc) of that piezo buzzer.

    July 10, 2021 at 7:23 pm #28931
    uRADMonitor
    Keymaster

    Nothing fancy there, really, these were some 3.3V (5V is good too) active buzzers . They are controlled with a NPN transistor so you can use pretty much anything. You can also connect a LED instead. Here is another link: https://www.aliexpress.com/item/33059794164.html and a picture attached.

    Attachments:

    1. U769ee342818e41019da42e53d90031d8c.jpg

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