The amount of busted modules ive got over the years ive started to buy the SMD individual parts so i can swap them out as the most important part of the module is the PCB itself.
This is an awesome introduction to the modules we quite frequently find on places like Ebay and Aliexpress - So id like to give you a huge round of thanks especially at helping also introduce failure-points (the replaceable fuse section ! BEFORE ! the voltage step-down converter) so that the fuse blows instead of the module itself.
If you want to know more about the fuses please refer to our tutorial on them when we release it. Of course this means that we will have to replace the Fuse (because it's melted now) and correct the circuit which tried to draw too much current. This will stop the current flow and the high current won't be able to come to the converter. Inside the Fuse there is a thin wire made of a material which melts on low temperatures, the thickness of the wire is carefully adjusted during the manufacturing so that the wire will break (or unsolder) if the current goes above 2 Amps. This will provide the necessary protection for our IC. So we will take a 2 Amp fuse and wire it according to the image below. In this specific case our converter needs protection from 2 Amps.
Here we would like to introduce another component: the Fuse. I believe that you have already understood that from the step above, but how to protect the IC from the high current? Another thing to mention when working with power modules like converters is that they will burn out if the current goes too high.
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