Juz89
New elf
Hi,
After coming across a post asking about over voltage protection on devices specifically following the failure of a Buck converter i decided to post a design i had been playing with a while ago. I have since created a prototype PCB rated to 5amps and proved its function.
Basically what this circuit board will do is if greater then 5.3v (This voltage can be changed by changing 2 resistors) is detected on the input side it will essentially short circuit the + to - causing the on board fuse to blow.
In actual testing what i have found is that once that voltage limit is reached it drops the output power to approx 1.2v for a period of approx 1 sec before blowing the fuse.
These boards could also be used to protect 12v systems by just changing 2 resistors in manufacturing.
There was some feedback within chat last night about removing the fuse to reduce the footprint size which could be done but you would just need a fuse placed on the input side of the board. Doing this would also allow the removal of the Screw terminals and allowing wire to be soldered directly to the board and being covered in adhesive heat shrink for example.
These boards would be $10 each which i believe to be a decent price compared to the potential of replacing things that have been supplied power greater then designed to handle.
My questions are
Is there any interest within this community for such a board?
Is there any improvements anyone can suggest on the design?
After coming across a post asking about over voltage protection on devices specifically following the failure of a Buck converter i decided to post a design i had been playing with a while ago. I have since created a prototype PCB rated to 5amps and proved its function.
Basically what this circuit board will do is if greater then 5.3v (This voltage can be changed by changing 2 resistors) is detected on the input side it will essentially short circuit the + to - causing the on board fuse to blow.
In actual testing what i have found is that once that voltage limit is reached it drops the output power to approx 1.2v for a period of approx 1 sec before blowing the fuse.
These boards could also be used to protect 12v systems by just changing 2 resistors in manufacturing.
There was some feedback within chat last night about removing the fuse to reduce the footprint size which could be done but you would just need a fuse placed on the input side of the board. Doing this would also allow the removal of the Screw terminals and allowing wire to be soldered directly to the board and being covered in adhesive heat shrink for example.
These boards would be $10 each which i believe to be a decent price compared to the potential of replacing things that have been supplied power greater then designed to handle.
My questions are
Is there any interest within this community for such a board?
Is there any improvements anyone can suggest on the design?
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