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by Zwartoog
Tue Mar 10, 2020 2:49 pm
Forum: Beginners
Topic: House audio distribution. Please point me in the right direction....
Replies: 2
Views: 429

Re: House audio distribution. Please point me in the right direction....

First off: I have no clue how C-Bus works, so here is a solution that only uses WiFi/UTP. I think the "simplest" way is to use multiple Pi's for this: a master Pi, and in each room a client Pi. Each client has a DAC HAT, to which you can connect your amplifiers. Depending on your demands, Pi Zero's ...
by Zwartoog
Tue Mar 10, 2020 1:11 pm
Forum: Beginners
Topic: Audio output
Replies: 2
Views: 181

Re: Audio output

Not sure why the subwoofer does not work: this could be the problem of the speakers. Does it work when you connect these to another source (e.g. your computer)? It can also be that the Pi does not output low audio frequencies. It seems generally accepted that if you want some decent audio output, yo...
by Zwartoog
Mon Mar 09, 2020 10:23 pm
Forum: Advanced users
Topic: Raspberry Pi and Powerbank
Replies: 16
Views: 1367

Re: Raspberry Pi and Powerbank

Far more likely those cheapie powerbanks and LM2596 modules are not putting out stable enough voltage. Something which can only be checked with a scope & shunt. Even the best meter can deceive. In fact attaching a meter of any kind will make things worse due to 'burden voltage'. On at least 2 occas...
by Zwartoog
Mon Mar 09, 2020 9:34 pm
Forum: Advanced users
Topic: What is the best way to create compressed disk image?
Replies: 19
Views: 1404

Re: What is the best way to create compressed disk image?

Ouch, that's embarrassing :oops:
by Zwartoog
Mon Mar 09, 2020 9:33 pm
Forum: Advanced users
Topic: Raspberry Pi and Powerbank
Replies: 16
Views: 1367

Re: Raspberry Pi and Powerbank

I experimented previously with a Pi4B, put ~5V adjustable power supply to the +5V rail directly. The "under voltage" message still appears with 5.00V (according to my voltage meter), turning it up a bit to 5.05V or so removes the message. Not sure where the 4.65V fits in. IIRC (it's been a long whi...
by Zwartoog
Mon Mar 09, 2020 2:09 pm
Forum: Advanced users
Topic: Raspberry Pi and Powerbank
Replies: 16
Views: 1367

Re: Raspberry Pi and Powerbank

I know this is an old thread, but: the Pi registering undervoltage means in my experience nothing more than that the supply voltage is less than its reference. I experimented previously with a Pi4B, put ~5V adjustable power supply to the +5V rail directly. The "under voltage" message still appears w...
by Zwartoog
Mon Mar 09, 2020 11:26 am
Forum: Advanced users
Topic: What is the best way to create compressed disk image?
Replies: 19
Views: 1404

Re: What is the best way to create compressed disk image?

I am not sure why you keep on moving back-and-forth between Windows and the Pi. I assume this is a process you do yourself to prepare a suitable image to prepare for the generic audience? I would do something like this: - by a USB-SD card reader - prepare your distribution on SD card 1, i.e. SDPEPPY...
by Zwartoog
Sun Mar 08, 2020 5:38 pm
Forum: Advanced users
Topic: Powering my RPi projects using buck converters
Replies: 52
Views: 6395

Re: Powering my RPi projects using buck converters

These buck converters look very familiar. There is one problem in using them. They create a lot of high frequency noise on the 5V power line. I have never been able to use these converter with the 7" official touch screen. The display image looks ok. But the touch screen part refuses to work. Addin...

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