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by ianwill
Sun Jun 17, 2012 9:36 pm
Forum: General discussion
Topic: Design flaw? Polyfuses for USB current limiting
Replies: 245
Views: 125337

Re: Design flaw? Polyfuses for USB current limiting

That may work fine, but be aware that the microUSB connector is usually rated for somewhat under 2 amps. If you push the current rating I would expect the connector to get hot, and also perhaps have more voltage drop than expected. If I was going to do this much rework on the PCB, I think I'd also a...
by ianwill
Sun Jun 17, 2012 11:09 am
Forum: General discussion
Topic: Design flaw? Polyfuses for USB current limiting
Replies: 245
Views: 125337

Re: Design flaw? Polyfuses for USB current limiting

Hi, ..... For the last few days I was trying, in vain, to get my wifi dongle (RT2770 based) to work. But all the erratic behaviour I was seeing vanished after I ran a wire from the Raspberry Pi 5V input to the USB sockets pins 1 (effectively bridging the fuses). In conclusion: 1. If you can't get y...
by ianwill
Sun Jun 17, 2012 10:45 am
Forum: General discussion
Topic: Design flaw? Polyfuses for USB current limiting
Replies: 245
Views: 125337

Re: Design flaw? Polyfuses for USB current limiting

I have been watching with interest the discussions re fusing and current draw from usb ports and have a few observations to make from my own experience. I had a lot of problems initially with the pi with intermittent resetting or not booting at all so did some investigations into the power supply ra...

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