So, I'm in the the process of building some of the DIY amps on this site, so far it going great, one finished, one in progress. When I am testing the amp modules I use either my CD-player, cellphone or laptop - but I am worried if something goes wrong/shorts in the amp-module that excessive current/voltage is going directly to my input device, and most likely destroying the input device.
My question is: Is there some way of protecting the input device (circuit, some kind of fuse, isolation transformer etc. ) ?
This will only be in the testing phase - so no special requirements for audio quality.
My question is: Is there some way of protecting the input device (circuit, some kind of fuse, isolation transformer etc. ) ?
This will only be in the testing phase - so no special requirements for audio quality.
That is an unlikely scenario for any typical amplifier unless you yourself shorted (say) the supply voltage directly to the input.
If that's a possibility then the best protection is a series resistor at the input, and diode (zener) clamping on the source component side of things. You should also add a non polarised coupling cap of voltage rating equal or higher than either rail.
If that's a possibility then the best protection is a series resistor at the input, and diode (zener) clamping on the source component side of things. You should also add a non polarised coupling cap of voltage rating equal or higher than either rail.
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