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by ProfSparkles
Mon Aug 05, 2019 11:47 am
Forum: Troubleshooting
Topic: Raspberry Pi 4 - Dead USB, no VBUS
Replies: 12
Views: 660

Re: Raspberry Pi 4 - Dead USB, no VBUS

Sure, I would have otherwise RMA'd with the shop I got it from. Can we maybe do this via email, I send you my postal address and you send me a shipping label as PDF?
You can send me a PM here or on twitter https://twitter.com/timonsku
by ProfSparkles
Thu Aug 01, 2019 2:48 pm
Forum: Troubleshooting
Topic: Raspberry Pi 4 - Dead USB, no VBUS
Replies: 12
Views: 660

Re: Raspberry Pi 4 - Dead USB, no VBUS

So Source is sitting on a signal from VL805 instead of GND which got a pull up to 3.3v and another signal from VL805 is also switching the Gate? That sounds a bit odd, are you sure that Source is not supposed to be tied to GND? This is what I'm currently understanding and doesn't sound right. https:...
by ProfSparkles
Thu Aug 01, 2019 11:43 am
Forum: Troubleshooting
Topic: Raspberry Pi 4 - Dead USB, no VBUS
Replies: 12
Views: 660

Re: Raspberry Pi 4 - Dead USB, no VBUS

But how does it switch the EN signal to GND then? Is this a depletion or enhancement mode mosfet?
by ProfSparkles
Wed Jul 31, 2019 11:58 pm
Forum: Troubleshooting
Topic: Raspberry Pi 4 - Dead USB, no VBUS
Replies: 12
Views: 660

Re: Raspberry Pi 4 - Dead USB, no VBUS

Ah interesting, will probe around a bit in the meantime. E: Here is what I measured on the mosfet. That source sits at 3.3v sounds like an issue, can't imagine that is normal? Is it not tied to GND permanently? A little more complete schematics for the Pi4 would be great tbh :) https://i.imgur.com/X...
by ProfSparkles
Tue Jul 30, 2019 9:35 pm
Forum: Troubleshooting
Topic: Raspberry Pi 4 - Dead USB, no VBUS
Replies: 12
Views: 660

Raspberry Pi 4 - Dead USB, no VBUS

The USB on my Raspberry Pi 4 died after attaching it to the official touchscreen (via the 5V on the GPIO on older models this was not recommended but I was pretty confident that this should not be an issue with the 15W power budget of the Pi4 (with official PSU)). The Pi still works fine otherwise a...
by ProfSparkles
Sun Aug 28, 2016 9:45 pm
Forum: Automation, sensing and robotics
Topic: Fast ADC with MCP3208
Replies: 69
Views: 32441

Re: Fast ADC with MCP3208

@Gordon
Did you ever got around to implement the MCP3208 into WirinigPi?
Looked into the git but couldn't find anything.
A big +1 for a proper WiringPi implementation. Would have no problem to send you a few for testing.
by ProfSparkles
Mon Feb 29, 2016 6:07 pm
Forum: Advanced users
Topic: Raspberry Pi 3 Video decoding
Replies: 13
Views: 20850

Re: Raspberry Pi 3 Video decoding

Awesome! Will there be some standalone software available for this? Kind of like omxplayer.
by ProfSparkles
Mon Feb 29, 2016 5:53 pm
Forum: Advanced users
Topic: Raspberry Pi 3 Video decoding
Replies: 13
Views: 20850

Raspberry Pi 3 Video decoding

So ArsTechnica is claiming [email protected] for h264 and [email protected] for h265. This contradicts other information I read which stated the same specs for video decoding. Could we get that cleared up? http://arstechnica.com/information-technology/2016/02/raspberry-pi-3-has-wi-fi-and-bluetooth-64-bit-chip-s...
by ProfSparkles
Sat Jan 02, 2016 11:13 pm
Forum: General discussion
Topic: wayland/weston and maynard ???
Replies: 14
Views: 3142

Re: wayland/weston and maynard ???

@Heater
Yes that is part of the picture and imo the most important part that Wayland will bring us. With that the Pi has a lot more to offer in terms of GUI and games programming.
by ProfSparkles
Mon Sep 29, 2014 7:41 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi and 4k @ 15Hz
Replies: 123
Views: 169019

Re: Raspberry Pi and 4k @ 15Hz

This is a super interesting topic, has there been any progress?
I was wondering if h264_freq wasn't (software?) locked to 250MHz we might have a chance of playing back 4k video by increasing that clock?

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