Identifying the Odd Electronic Component

If you ever come across an electronic component that looks like this (a small electrolytic capacitor or radial inductor) with simply the letters “HDX” and rattles if you shake it (even a little bit) then I’ll save you some trouble.  It’s called a “vibration switch”!  And, as you might guess, it’s a SPST switch that […]

Power Supply

I needed a power supply that could give out enough peak current to power at least three Raspberry Pi 2s.  Just idle one Raspberry Pi 2 can draw almost 500 mA but at peak processing speed one can draw around 2 Amps at 5V.  I didn’t want to have to have three “wall warts” so I […]

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