This is a clever approach to making a portable air pump.  Whether you need to aerate something while travelling or have an emergency battery backed or solar powered air source, this unit could be useful.

It's based on what appears to be a standard pump with a very minimalist cover, and current is low - especially after a little hack.

I'm not sure what overall lifespan this unit has for continuous operation.  The weakest points may be the rotating offset pin-cam or the motor brushes.

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