Tuesday, 12 January 2016

wall wart - Is there a standard DC power jack that prevents devices from being damaged by the wrong voltage?



USB is by far the most widely used serial bus by consumers. Plugging any device in any USB port is safe from hardware point of view.


On the other hand, the common DC power jack . For example this guy is quite common, but without regard for the output voltage shape or size:


enter image description here


I recently ruined an expensive device by plugging a 12VDC power supply into it, instead of 5VDC (I was using two devices, that need different voltages, but have the same connector).


Is there a standard that prevents connecting a device with a power supply of the wrong voltage? E.g. square plugs for 5V, triangle for 12V etc. Or PC-like molex connector with the not needed voltages hallow? enter image description here





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