Anyone who's worked in electronics manufacturing knows that printed circuit boards and soldered assemblies have a distinctive smell. The epoxy laminate boards get washed, but still have an odor, and we wash the flux residue off after soldering, but there are still odors that linger when acres of PCBs go across your manufacturing floor.
I am a little surprised that a dog's nose is sensitive and rapid enough to find the circuit board in a microSD card. The number of atoms of this residue that off-gas and waft through the air to the dog's nose must be tiny!
I am a little surprised that a dog's nose is sensitive and rapid enough to find the circuit board in a microSD card. The number of atoms of this residue that off-gas and waft through the air to the dog's nose must be tiny!