UsbSafe2 - Page 1
Forum section: electronics / general

author: newbadboy
author_rank: Regular Contributor
timestamp: August 18, 2016, 08:38:04 pm
content: I've listened to ideas from backers and i'm soon releasing the latest version of UsbFuse2.It will featureOVP, over voltage protectionCurrent monitorAnti juice jacking modeOpen sourceCompetitive pricingNavigate tohttps://www.crowdsupply.com/karoly-simon/usbsafe2and subscribe for news and release date!!

author: Xenoamor
author_rank: Regular Contributor
timestamp: August 23, 2016, 12:17:54 pm
content: So....https://www.kickstarter.com/projects/885642492/multipurpose-usb-fuse?

author: badboy
author_rank: Contributor
timestamp: August 23, 2016, 12:21:58 pm
content: Yes this is the follow up.

author: Xenoamor
author_rank: Regular Contributor
timestamp: August 23, 2016, 12:42:50 pm
content: What happens if you overvoltage this?

author: badboy
author_rank: Contributor
timestamp: August 24, 2016, 05:46:08 pm
content: 6V is absolut maximum rating for this at the moment. Damage to Ic will occure. Why are you asking?

author: m98
author_rank: Frequent Contributor
timestamp: August 27, 2016, 08:18:29 pm
content: Quote from: badboy on August 24, 2016, 05:46:08 pmWhy don't you add a simple overvoltage protection circuit? Would be a nice additional feature.

author: Kilrah
author_rank: Unknown
timestamp: August 28, 2016, 10:55:16 am
content: +1 for overvoltage protection, damage from that is actually more likely to occur than from overcurrent. Most ports are already current-protected.

author: Wilo
author_rank: Newbie
timestamp: August 28, 2016, 03:21:45 pm
content: Overvoltage protection would limit the use of fast chargers (like Qualcomm Quick Charge 2.0/3.0), which can supply up to 12V.

author: m98
author_rank: Frequent Contributor
timestamp: August 28, 2016, 05:14:43 pm
content: Quote from: Wilo on August 28, 2016, 03:21:45 pmBut 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.

author: badboy
author_rank: Contributor
timestamp: August 28, 2016, 07:30:06 pm
content: You are all right but somewhere i needed to draw the line. Maybe in future.

author: Esposch T. Tapir
author_rank: Contributor
timestamp: August 30, 2016, 09:33:49 am
content: 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.

author: Kilrah
author_rank: Unknown
timestamp: August 30, 2016, 09:47:17 am
content: 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.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: August 30, 2016, 04:07:41 pm
content: 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/Tim

author: Xenoamor
author_rank: Regular Contributor
timestamp: August 31, 2016, 11:44:47 am
content: The only damage I've had from USB is over voltage, but I work with 200V plus stuffSafe to say after the first destruction everything is fully isolated and sitting behind a USB hub

author: Kilrah
author_rank: Unknown
timestamp: August 31, 2016, 01:09:26 pm
content: https://www.usbkill.com/

author: newbadboy
author_rank: Regular Contributor
timestamp: August 31, 2016, 04:40:26 pm
content: Quote from: Esposch T. Tapir on August 30, 2016, 09:33:49 amYes, 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

author: newbadboy
author_rank: Regular Contributor
timestamp: August 31, 2016, 04:48:29 pm
content: Quote from: T3sl4co1l on August 30, 2016, 04:07:41 pmYes 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.

author: newbadboy
author_rank: Regular Contributor
timestamp: August 31, 2016, 04:53:00 pm
content: Quote from: Kilrah on August 31, 2016, 01:09:26 pmtihi power surge attack, that seems kind of BS. But it will probably kill your USB if thats what you want

author: newbadboy
author_rank: Regular Contributor
timestamp: September 28, 2016, 11:58:13 am
content: I've listened to ideas from backers and i'm soon releasing the latest version of UsbFuse2.It will featureOVP, over voltage protectionCurrent monitorAnti juice jacking modeOpen sourceCompetitive pricingNavigate tohttps://www.crowdsupply.com/karoly-simon/usbsafe2and subscribe for news and release date!!

author: newbadboy
author_rank: Regular Contributor
timestamp: October 22, 2016, 08:01:24 am
content: The campaign is now live. Go and get one!

author: newbadboy
author_rank: Regular Contributor
timestamp: November 03, 2016, 06:50:33 pm
content: Actually the campaign is picking up speed now and thing seems to develop good!!!!

author: bktemp
author_rank: Super Contributor
timestamp: November 06, 2016, 05:48:00 pm
content: Quote from: blueskull on November 06, 2016, 03:13:02 pmUSB 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.

author: newbadboy
author_rank: Regular Contributor
timestamp: November 15, 2016, 12:51:41 pm
content: So the campaign has reached 100%. Feels great!

author: newbadboy
author_rank: Regular Contributor
timestamp: December 01, 2016, 08:28:11 pm
content: 4 days left!

author: newbadboy
author_rank: Regular Contributor
timestamp: December 30, 2016, 10:39:54 am
content: Now it's possible to pre order if you want one!

author: Sjokolade
author_rank: Regular Contributor
timestamp: March 09, 2017, 11:36:59 pm
content: Thanks, it arrived in mail today.

author: newbadboy
author_rank: Regular Contributor
timestamp: March 10, 2017, 05:32:21 am
content: Great to hear! Hope it meets your expectations, and once again thx for backing!