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snacks

Snacks

really, i don't get why this diode is there. Was wondering if it's to protect the usb from higher voltages on the dc in but in this diagram you can see that's not the case. It just seems to be a rectifying diode on a dc input
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snacks

Snacks

Reply to @snacks
i'm prob just too dumb to figure out what it's supposed to do
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mia@shrimptest.0x0.st

mia (developer mode)

Reply to @snacks
@snacks ESD?
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snacks

Snacks

Reply to @mia@shrimptest.0x0.st
@mia for the psu?
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mia@shrimptest.0x0.st

mia (developer mode)

Reply to @snacks
@snacks didn’t actually look at the diagram lol
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snacks

Snacks

Reply to @snacks
@mia ohhhhhhh. It shipped with a 9v battery adapter. Maybe it's supposed to protect against idiots jamming the battery against the terminals the wrong way around
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mia@shrimptest.0x0.st

mia (developer mode)

Reply to @snacks
@snacks oh that seems likely
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mia@shrimptest.0x0.st

mia (developer mode)

Reply to @mia@shrimptest.0x0.st
Edited 5 days ago
@snacks no protection rune for the USB tho…
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twinspin6@outerheaven.club

twinspin

Reply to @mia@shrimptest.0x0.st
@mia @snacks protection sigil waow
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snacks

Snacks

Reply to @mia@shrimptest.0x0.st
@mia someone is paranoid about bad usb implementations
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mia@shrimptest.0x0.st

mia (developer mode)

Reply to @snacks
@snacks all of them are
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mia@shrimptest.0x0.st

mia (developer mode)

Reply to @mia@shrimptest.0x0.st
@snacks USB power is noisier than a ham radio, you have no idea how much ESD is going on there
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mia@shrimptest.0x0.st

mia (developer mode)

Reply to @mia@shrimptest.0x0.st
@snacks if you have an ungrounded ethernet switch connecting two systems across the room, bringing the USB connector close to the computer chassis can already cause arcing
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snacks

Snacks

Reply to @mia@shrimptest.0x0.st
@mia ok, but against noise you usually get filtering, not clamping and reverse current protection^4
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snacks

Snacks

Reply to @snacks
@mia nvm, can't really filter a data line akkoderp
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snacks

Snacks

Reply to @snacks
@mia but, that thing really looks like an optocoupler could do its job better?
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