Good day folks. With nothing better to do in the shop and the weather being all cold and rainy, I was digging around the parts bin and found an audio amp module presumably out of a TV or something...smells like a Vestel TBH, since it's an 18AMP...something (can't remember) and I could've sworn I've seen this board before somewhere.
Without going into too much detail, I wired it up and powered it with 24v from a laptop power brick and it works pretty good...great for driving speakers and stuff (you can never have too many speakers) But I noticed one thing: when I connect the power to it there's quite a considerable spark at the connector - enough to make me jump the first time, though I should've expected it with so many electrolytic caps on there. I dug around the internet to devise the simplest possible inrush limit circuit for this thing and I believe I found something here, towards the bottom with the N-channel MOSFET in series with the negative line.
Looks simple enough to build....no specs on those components though, so that's why I'm hesitant and requires some guessing. I don't have access to some super fancy measuring equipment, nor do I expect any laboratory-grade result...just something simple to allow this thing to turn on without creating a loud pop....I was gonna put this in an enclosure and make a desktop amp for a friend (don't judge ), but it's got this slight issue which would ruin any power connector pretty quickly, plus it would cause jump-scares The device itself is not relevant - it could be any DC capacitive load.
Without going into too much detail, I wired it up and powered it with 24v from a laptop power brick and it works pretty good...great for driving speakers and stuff (you can never have too many speakers) But I noticed one thing: when I connect the power to it there's quite a considerable spark at the connector - enough to make me jump the first time, though I should've expected it with so many electrolytic caps on there. I dug around the internet to devise the simplest possible inrush limit circuit for this thing and I believe I found something here, towards the bottom with the N-channel MOSFET in series with the negative line.
Looks simple enough to build....no specs on those components though, so that's why I'm hesitant and requires some guessing. I don't have access to some super fancy measuring equipment, nor do I expect any laboratory-grade result...just something simple to allow this thing to turn on without creating a loud pop....I was gonna put this in an enclosure and make a desktop amp for a friend (don't judge ), but it's got this slight issue which would ruin any power connector pretty quickly, plus it would cause jump-scares The device itself is not relevant - it could be any DC capacitive load.
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