• catloaf@lemm.ee
    link
    fedilink
    English
    arrow-up
    6
    ·
    2 months ago

    I was thinking the same thing. This isn’t your Nokia IED where you just wire the ringer to the detonator. There must be some additional circuitry to handle a special signal. A pre-programmed high-pitched ring for certain numbers maybe? Or a little logic chip to recognize numbers or messages?