Anyone looking for a convenient way to protect electronic devices whilst they are being charged may be interested in a new multipurpose USB fuse board that has been created by Karoly Simon based in Sweden and is available for around £16.
The multipurpose USB fuse offers five modes that make it safe to charge and power almost anything from a USB outlet, watch the video below to learn more about how this small USB board can help you look after your expensive electronic devices with ease.
Features of the multipurpose USB fuse include :
– OV (over voltage) protection.
– Visual OV warning by LED. (Ongoing)
– OC (over current) protection.
– Microprocessor controlled (Microchip 12F675).
– Mode1=0.5A, Mode2=0.9A, Mode3=1.5A, Mode4=2.1A, Mode5=2.4A.
– USB 2 verified. (Usb 3 ongoing).
– Easy use.
– Setting saved at powerloss.
– Operating ambient temperature. Indoor use ony.
– Operating voltage.4,75V-5.4V.
– Maximum operating current 2.5A.
I often connect different equipment to my computer for lab purpose and at one occasion i shortcircuited the USB port. It was not damaged but i then realized how great it would be to have some kind of external protection, that can be used with many applications. Not only for computers.
The function should fit many situations and electronic gadgets. The idea evolved to be a solution that will protect anything from shortcircuit/ overload and which can be connected together with a USB connector/ port. The fuse shall work indenpendently and use settings set by user and not by some software controll. Then you are always sure what the current limits/ settings are!
There are endless ways of implementing the functionality but i early decided to keep it simple. The only thing the user needs to take care of is to set the maximum current limit for every unique usercase. There are 5 current modes that would fit the most common situations. A button is used for all interaction with the fuse. A long press on the button sets a new mode. Short press on the button at any time will show the current setting. As mentioned before there are 5 current limits to chose between and this is displayed by the LED after a short button press. As example, if mode 3 is set the LED will blink three times, mode 5 will result in five blinks.
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