Recent content by josephii3

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  1. J

    Compass 320 magnum metal detector where plugs go

    If you have a 6-pin header on the board but the connector only has 3 female wires, it usually means only 3 of those pins are actually used for that specific connection. Look closely at the board to see if there are any faint printed labels near those pins (like TX, RX, GND, or power).
  2. J

    Design and construct a reaction timer

    Before you start drawing the schematic, figure out if you're doing this with discrete logic chips or a microcontroller. If it's a school project for discrete logic, grab a handful of 555 timers and 4026 chips. If you're allowed to use a microcontroller (like an Arduino), this is a 20-minute...
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