EEVblog Electronics Community Forum
Products => Crowd Funded Projects => Topic started by: newbadboy on August 18, 2016, 08:38:04 pm
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I've listened to ideas from backers and i'm soon releasing the latest version of UsbFuse2.
It will feature
OVP, over voltage protection
Current monitor
Anti juice jacking mode
Open source
Competitive pricing
Navigate to https://www.crowdsupply.com/karoly-simon/usbsafe2 (https://www.crowdsupply.com/karoly-simon/usbsafe2) and subscribe for news and release date!!
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So.... https://www.kickstarter.com/projects/885642492/multipurpose-usb-fuse (https://www.kickstarter.com/projects/885642492/multipurpose-usb-fuse) ?
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Yes this is the follow up.
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What happens if you overvoltage this?
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6V is absolut maximum rating for this at the moment. Damage to Ic will occure. Why are you asking?
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6V is absolut maximum rating for this at the moment. Damage to Ic will occure. Why are you asking?
Why don't you add a simple overvoltage protection circuit? Would be a nice additional feature.
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+1 for overvoltage protection, damage from that is actually more likely to occur than from overcurrent. Most ports are already current-protected.
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Overvoltage protection would limit the use of fast chargers (like Qualcomm Quick Charge 2.0/3.0), which can supply up to 12V.
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Overvoltage protection would limit the use of fast chargers (like Qualcomm Quick Charge 2.0/3.0), which can supply up to 12V.
But why would you want to use this device to protect a charger? Also according to the OP it gets destroyed from anything over 5V anyways.
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You are all right but somewhere i needed to draw the line. Maybe in future.
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Have you heard of the USB Condom before?
Yours looks similar but with OCP.
Great video; shows off the product really well, but I'm not quite sure why I'd buy one.
Most (all?) USB ports on PCs/laptops are protected by a polyfuse, and I've never heard of a charger accidentally sending huge current surges into batteries.
I'd actually be curious to know if this is possible to have a spike in the current without also spiking the voltage.
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The only thing this can be useful for is the case where a faulty USB cable or device shorts an unprotected port on and expensive device, which is indeed a very unlikely scenario. Can't see who would be willing to put up with the cost and bulk of this thing on each of their USB connections.
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I made a thingy before; it could be scaled down to the same thing, but with more accurate current limiting and higher voltage tolerance:
http://seventransistorlabs.com/Fuse/ (http://seventransistorlabs.com/Fuse/)
Tim
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The only damage I've had from USB is over voltage, but I work with 200V plus stuff
Safe to say after the first destruction everything is fully isolated and sitting behind a USB hub
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https://www.usbkill.com/ (https://www.usbkill.com/)
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Have you heard of the USB Condom before?
Yours looks similar but with OCP.
Great video; shows off the product really well, but I'm not quite sure why I'd buy one.
Most (all?) USB ports on PCs/laptops are protected by a polyfuse, and I've never heard of a charger accidentally sending huge current surges into batteries.
I'd actually be curious to know if this is possible to have a spike in the current without also spiking the voltage.
Yes, the crowdfounded usb condom seems to be a pure passive dongle which you can't controll and don't have usb passthrough.
thx regarding the video, took some time to get it right :)
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I made a thingy before; it could be scaled down to the same thing, but with more accurate current limiting and higher voltage tolerance:
http://seventransistorlabs.com/Fuse/ (http://seventransistorlabs.com/Fuse/)
Tim
Yes and i would surely use one myself in the lab. But still it's not optimized for a non techie nor usb at the moment.
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https://www.usbkill.com/ (https://www.usbkill.com/)
tihi power surge attack, that seems kind of BS. But it will probably kill your USB if thats what you want :)
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I've listened to ideas from backers and i'm soon releasing the latest version of UsbFuse2.
It will feature
OVP, over voltage protection
Current monitor
Anti juice jacking mode
Open source
Competitive pricing
Navigate to https://www.crowdsupply.com/karoly-simon/usbsafe2 (https://www.crowdsupply.com/karoly-simon/usbsafe2) and subscribe for news and release date!!
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The campaign is now live. Go and get one!
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Actually the campaign is picking up speed now and thing seems to develop good!!!!
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https://www.usbkill.com/ (https://www.usbkill.com/)
It is not very efficient as a USB port killer.
Judging from its look, it seems like it uses a photo flash IGBT to fire a shock, which looks like a bad design to me.
In these port killers, you want as fast di/dt as possible to make ESD diodes useless
USB killer does not try to have a very fast di/dt, because that is the purpose of ESD diodes to protect from ESD events with a high di/dt because of the high voltage involved. Instead the USB killer puts enough energy into the data lines to burn the ESD diodes/their bond wires. You don't need any fast di/dt, and also no very high current, because high speed ESD diodes are designed only for a small amount of energy.
Are SCRs really faster than IGBTs at turn on? Most SCRs are specified at max 50A/us to 100A/us and have a switching time somewhere around 1us. That's why you usally put an inductor in series to limit the di/dt, otherwise they will fail.
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So the campaign has reached 100%. Feels great!
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4 days left!
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Now it's possible to pre order if you want one!
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Thanks, it arrived in mail today.
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Great to hear! Hope it meets your expectations, and once again thx for backing!