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by mahjongg
Thu Nov 23, 2017 12:12 am
Forum: General discussion
Topic: How to use Raspberry as Hi fi sound card in desktop pc
Replies: 12
Views: 444

Re: How to use Raspberry as Hi fi sound card in desktop pc

Not how I see it, he clearly thought the RPI contained a "sound card". It is logical for a person that only knows PC's to think that. most unlikely that he has ever heard about the HiFiBerry, and unless he tells us he did its speculation to assume he did. In any case I will not delete this topic bec...
by mahjongg
Wed Nov 22, 2017 11:57 pm
Forum: General discussion
Topic: How to use Raspberry as Hi fi sound card in desktop pc
Replies: 12
Views: 444

Re: How to use Raspberry as Hi fi sound card in desktop pc

"The PI as HiFi soundcard" I translate that as the the PI having HDMI sound output, so can a PI be used as an USB sound-card? Perhaps a bit insulting question for PI aficionados, but a valid one. AFAIK there is no "raspberry PI USB soundcard", and if there were one it could also be used with a PC, a...
by mahjongg
Wed Nov 22, 2017 11:52 pm
Forum: Deutsch
Topic: Raspberry Pie 3 für weihnachten
Replies: 3
Views: 86

Re: Raspberry Pie 3 für weihnachten

moved to Deutsch and changed title.
by mahjongg
Wed Nov 22, 2017 6:37 pm
Forum: Beginners
Topic: Raspberry PI 3 datasheet?
Replies: 3
Views: 118

Re: Raspberry PI 3 datasheet?

The hardware of the Raspberry PI is NOT "open source", but what is available can be found here:
https://www.raspberrypi.org/documentation/hardware/
by mahjongg
Tue Nov 21, 2017 11:59 pm
Forum: General programming discussion
Topic: A better gui text editor?
Replies: 51
Views: 17723

Re: A better gui text editor?

+1
by mahjongg
Tue Nov 21, 2017 5:53 pm
Forum: General discussion
Topic: How to use Raspberry as Hi fi sound card in desktop pc
Replies: 12
Views: 444

Re: How to use Raspberry as Hi fi sound card in desktop pc

You will need a raspberry PI that can act as an USB slave if you want to connect it to a PC as a peripheral, the only one that can is a raspberry PI zero. You will also need specific software to emulate an USB sound device, I don't think that exists. So, not worth it, it's much cheaper to just buy a...
by mahjongg
Tue Nov 21, 2017 5:48 pm
Forum: Beginners
Topic: Problems with Booting RPi on For the First Time
Replies: 2
Views: 66

Re: Problems with Booting RPi on For the First Time

Read the boot problem sticky in the beginners section.
by mahjongg
Mon Nov 20, 2017 12:23 am
Forum: General discussion
Topic: Format SD card
Replies: 5
Views: 189

Re: Format SD card

if the micro controller inside the SD-card senses that the flash memory inside the card is at the end of its life it switches itself to read only to protect the data that is in the flash cells.
The best thing to do is to back the card up, to a new SD-card and continue with new "fresh" flash cells.
by mahjongg
Sun Nov 19, 2017 4:58 pm
Forum: Windows 10 for IoT
Topic: buzzer sound in iot project c#
Replies: 2
Views: 94

Re: buzzer sound in iot project c#

tbx1 wrote:
Sun Nov 19, 2017 4:34 pm
the code is written in python , i would like to ask how to code this in c#
Really understand what the code does, then recreate it using C#.

want to add this as a trigger for my rfid sensor when it senses a card
add a music playing program as a "trigger"? doesn't make sense.... :mrgreen:
by mahjongg
Sun Nov 19, 2017 4:38 pm
Forum: Add-ons
Topic: Can this LCD display be used on RPI ?
Replies: 2
Views: 120

Re: Can this LCD display be used on RPI ?

these are simple bare LCD panels, so they need a lot of extra electronics, electronics that creates a RAM memory called a "frame buffer" which it can use to drive the LCD panel, then you also need more electronics so that your driving computer can write into the frame buffer, copying from its own in...
by mahjongg
Sun Nov 19, 2017 4:26 pm
Forum: Off topic discussion
Topic: Mike OS on Raspberry Pi
Replies: 21
Views: 1038

Re: Mike OS on Raspberry Pi

In addition to Mike OS needing an x86 processor, it also needs the video characteristics provided by a PC with a typical PC video card, such as CGA, EGA or VGA and predecessor video systems, meaning it needs video character memory a a certain memory location and color video memory at another locatio...
by mahjongg
Sat Nov 18, 2017 3:34 pm
Forum: General discussion
Topic: Combining Voltage From Multiple GPIO Pins?
Replies: 10
Views: 429

Re: Combining Voltage From Multiple GPIO Pins?

A joule thief is great, but needs a transformer, so is a bit large and expensive, my idea was to use a voltage doubler circuit like this: https://www.elprocus.com/wp-content/uploads/2015/01/Voltage-Doubler.jpg on the input you need a square wave of a few hundred Hz, which can be easily done with a p...
by mahjongg
Fri Nov 17, 2017 11:00 pm
Forum: General discussion
Topic: Combining Voltage From Multiple GPIO Pins?
Replies: 10
Views: 429

Re: Combining Voltage From Multiple GPIO Pins?

no, GPIO's share a common GND pin, so they cannot be placed "in series". Also, it seems that the forward voltage for your LED is actually larger than the voltage on a GPIO pin, (which often the case with blue or white LED's) so no current will flow through the LED. so normally this would not be poss...
by mahjongg
Thu Nov 16, 2017 12:10 am
Forum: Compute Module
Topic: Making a IO board
Replies: 9
Views: 322

Re: Making a IO board

PhilE wrote:
Wed Nov 15, 2017 9:40 pm
The BCM283x family of processors can't address more than 1GB of RAM, so item 1) is essentially impossible. The other requirements sounds reasonable, but be careful of running out of memory bandwidth.
storage, not RAM, a PI can essentially use a (nearly) limitless amount of storage.
by mahjongg
Tue Nov 14, 2017 11:05 am
Forum: FreeBSD
Topic: altq support on FREEBSD
Replies: 8
Views: 360

Re: altq support on FREEBSD

right you are...
by mahjongg
Sun Nov 12, 2017 1:14 pm
Forum: FreeBSD
Topic: altq support on FREEBSD
Replies: 8
Views: 360

Re: altq support on FREEBSD

moved post to "OTHER OS", added "on freebsd" to subject line.
by mahjongg
Sat Nov 11, 2017 4:27 pm
Forum: Beginners
Topic: How to Update Bitcoin Core Software?
Replies: 2
Views: 132

Re: How to Update Bitcoin Core Software?

mining bitcoins with a PI makes no sense, real mining is done with special hardware (large FPGA's), which may be controlled with PI's, but a PI alone, that makes no sense!
by mahjongg
Wed Nov 08, 2017 11:58 am
Forum: Other
Topic: Repackaging Debian Desktop on USB?
Replies: 5
Views: 374

Re: Repackaging Debian Desktop on USB?

Moved to other OS, and changed the title, please don't confuse by calling Debian Raspbian!!!!
by mahjongg
Mon Nov 06, 2017 9:49 am
Forum: Advanced users
Topic: Rotary encoder on Raspberry Pi 3 [solved]
Replies: 4
Views: 207

Re: Rotary encoder on Raspberry Pi 3

Changed all instances op "potentiometer" in your post to rotary encoder, as that is what it is.
A potentiometer, is just an adjustable resistor divider, and couldn't be used the way you want to use it.
by mahjongg
Sun Nov 05, 2017 4:26 pm
Forum: Beginners
Topic: can I control the 5V rail?
Replies: 10
Views: 362

Re: can I control the 5V rail?

Please don't do necromancy! split your post off from the older thread and locked it, and renamed this post.
No you cannot control the 5V rail, it simply hardwired to the microUSB (via the polyfuse if your PI has one).
by mahjongg
Wed Nov 01, 2017 6:17 pm
Forum: Deutsch
Topic: Androide Smart TV
Replies: 1
Views: 258

Re: Androide Smart TV

Gibt es nicht!
Sehe viewtopic.php?f=73&t=71658
by mahjongg
Wed Nov 01, 2017 12:06 am
Forum: Beginners
Topic: Can I wire OR multiple GPIO?
Replies: 17
Views: 545

Re: Can I wire OR multiple GPIO?

Yes and no, NO you cannot wire two outputs together, and program one to output a high and the other low, as a near short circuit current would run between the two, burning out both GPIO's, destroying your PI. However it is possible, but a bit dangerous, to program a GPIO to act as an "Open drain" or...
by mahjongg
Tue Oct 31, 2017 12:54 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Raspberry Pi Zero W pulling power from USB data
Replies: 3
Views: 247

Re: Raspberry Pi Zero W pulling power from USB data

Vbus is also simply connected to 5V. so if power is removed the VBUS isn't powered either, so the dateline receive no power either from the 5V line, no different than other simple devices that use USB, and no different from the first PI model A, (the one with just one USB port, which didn't have an ...
by mahjongg
Mon Oct 30, 2017 10:34 am
Forum: General discussion
Topic: My rasp PI , changing IP and dynamic networking
Replies: 3
Views: 160

Re: My rasp PI , changing IP and dynamic networking

Posted by DJB in your duplicate thread, please don't create duplicates, they are confusing and create work for moderators. Service advertisement and discovery (on a local network) is done via multicast-DNS. Avahi is a daemon that provides mDNS on Raspbian and aside from providing hostname resolution...

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