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by wh7qq
Mon Jan 21, 2019 11:51 pm
Forum: General discussion
Topic: Need a case, heatsinks and fan. Also "is this a bad case?"
Replies: 64
Views: 3696

Re: Need a case, heatsinks and fan. Also "is this a bad case?"

I avoided Arctic epoxy because of this comment on their web site Arctic Silver™ Thermal Adhesive Arctic Silver Thermal Adhesive is a two part permanent adhesive for thermal joints in minimum bond line applications. It is NOT intended to be used between a CPU and the CPU heatsink. On a CPU please us...
by wh7qq
Mon Jan 21, 2019 7:01 pm
Forum: General discussion
Topic: Need a case, heatsinks and fan. Also "is this a bad case?"
Replies: 64
Views: 3696

Re: Need a case, heatsinks and fan. Also "is this a bad case?"

The Pi doesn't include any way to mount a heatsink (it uses an old cellphone processor after all - what cellphone has a heatsink?) So removing your heatsink and replacing it entirely depends on how you mount it. In my case, one SBC I use simply has the heatsink held in place by nothing more than th...
by wh7qq
Mon Jan 21, 2019 1:49 am
Forum: Beginners
Topic: First steps on coming Raspberry Pi 3 B+
Replies: 5
Views: 441

Re: First steps on coming Raspberry Pi 3 B+

Sounds like you have it all "wired" and you need little help from here. The Picoreplayer web pages and forums are going to be more to your interest. The RPi part is just a network appliance and the picoreplayer and add-ons cover it all. I really have no idea how an outboard ADC would interface or cr...
by wh7qq
Sun Jan 20, 2019 8:33 pm
Forum: Beginners
Topic: First steps on coming Raspberry Pi 3 B+
Replies: 5
Views: 441

Re: First steps on coming Raspberry Pi 3 B+

If you are really that picky about audio quality, perhaps the RPi is useful only as a network device for bringing in all those high resolution audio files and storing them. Perhaps you need an outboard ADC unit for the vinyl ripping feeding to the RPi for storage and your Topping DAC to convert the ...
by wh7qq
Sun Jan 20, 2019 6:46 pm
Forum: Troubleshooting
Topic: Help! Raspberrypi GPIO not giving enough current when battery management system shows 50%.
Replies: 5
Views: 256

Re: Help! Raspberrypi GPIO not giving enough current when battery management system shows 50%.

Depending on the model RPi and the current drain of the motor circuit, 2A may be insufficient. The RPi recommendation may be as high as 2.5 A for the model 3B+ and on the other end, zero's may draw up to 1 A. Add the motor to that and 2 A may not make it. Again, if you parallel more 18650's into the...
by wh7qq
Sat Jan 19, 2019 7:02 pm
Forum: Beginners
Topic: Logitech Wireless Touch Keyboard K400: Does it work for you?
Replies: 90
Views: 112952

Re: Logitech Wireless Touch Keyboard K400: Does it work for you?

The K400 worked out of the box on US English keyboard setting from Raspbian. I had some minor mix-up with the 105 key selection and reverted to the 101 and was ok. The thing that fooled me the worst was the stupid packaging arrangement: The development team designed a nice holder for the USB dongle ...
by wh7qq
Sat Jan 19, 2019 6:34 pm
Forum: Troubleshooting
Topic: raspberrypi-bootloader error during apt-get upgrade after restore form backup, how to fix?
Replies: 1
Views: 206

Re: raspberrypi-bootloader error during apt-get upgrade after restore form backup, how to fix?

Probably the least painful approach is to save your existing SD card as is and get a fresh one and burn the most recent OS on it. You an then transfer your important data to the new card. It sounds like you have a mismatch between your backups and the upgrades and if the versions don't all match up ...
by wh7qq
Sat Jan 19, 2019 5:40 pm
Forum: Beginners
Topic: First steps on coming Raspberry Pi 3 B+
Replies: 5
Views: 441

Re: First steps on coming Raspberry Pi 3 B+

Having just gone through some of what you are trying to do, I have some comments. I use an AudioInjector Stereo "hat" on an RPi 2B connected to line level outputs from RIAA preamp, tape deck, etc. An "easy" way to do it is by first getting the correct "alsamixer" settings and then actually controlli...
by wh7qq
Sat Jan 19, 2019 4:45 pm
Forum: Troubleshooting
Topic: Help! Raspberrypi GPIO not giving enough current when battery management system shows 50%.
Replies: 5
Views: 256

Re: Help! Raspberrypi GPIO not giving enough current when battery management system shows 50%.

The 18650 has a nominal voltage of 3.7 but its operational range is between 4.2 and something around 3.2 depending on when it is cut off. There is no way to tell from your post, how much current your car setup requires but the RPi cpu requires a minimum of 4.65 vdc give or take a few hundredths of a...
by wh7qq
Fri Jan 18, 2019 7:36 pm
Forum: Other projects
Topic: Alarm over Raspberry Pi
Replies: 7
Views: 609

Re: Alarm over Raspberry Pi

As best as I can understand from your post, you want to return a signal to the RPi when the native temperature control (TC) is cut back or off. The GPIO pins can either read or write so one could be configured to respond to an external signal...just be very sure that the GPiO pin never sees a voltag...
by wh7qq
Fri Jan 18, 2019 7:25 pm
Forum: Troubleshooting
Topic: Noisy Pi power supply?
Replies: 5
Views: 280

Re: Noisy Pi power supply?

Sounds like a defective supply...fight it out with Adafruit's Customer "Support".
by wh7qq
Fri Jan 18, 2019 7:21 pm
Forum: General discussion
Topic: 64-bit OS for RPi 3B+ [solved]
Replies: 10
Views: 10413

Re: 64-bit OS for RPi 3B+

I have heard that there is a 64 bit Ubuntu Mate available,
by wh7qq
Fri Jan 18, 2019 7:18 pm
Forum: General discussion
Topic: computer power supply
Replies: 26
Views: 1439

Re: computer power supply

The fuse may still be a good idea in the event of "misadventures" between the computer supply and the RPi.
by wh7qq
Fri Jan 18, 2019 2:30 am
Forum: Beginners
Topic: first app on pi, can't decide on language
Replies: 3
Views: 179

Re: first app on pi, can't decide on language

You might want to continue with the language you are familiar with, if it can be compiled by the RPi but you will find more pre-writen RPi code with python, somewhat less so with c. If the object is to make the RPi do something, using ground broken by others is efficient. On the other hand, if you n...
by wh7qq
Fri Jan 18, 2019 2:18 am
Forum: Beginners
Topic: How do i know when reboot is required after 'apt upgrade' command?
Replies: 6
Views: 290

Re: How do i know when reboot is required after 'apt upgrade' command?

If you don't reboot, the RPi keeps on running the same old stuff as before. The only way to bring in the upgraded material is to reboot. I am not convinced that is entirely correct as an absolute. As an absolute, no. If your office, or Scratch or another package is not running at the time, the fres...
by wh7qq
Wed Jan 16, 2019 8:00 pm
Forum: Networking and servers
Topic: Send data from raspberry pi to another raspberry pi
Replies: 2
Views: 324

Re: Send data from raspberry pi to another raspberry pi

One way would be to put the data from the first RPi into a file and send it to the second with an "scp" or "sftp" command where it gets opened, parsed and included with the second RPi's data. There may also be a way to connect the serial ports with each other...can't help with that.
by wh7qq
Wed Jan 16, 2019 6:54 pm
Forum: Beginners
Topic: How do i know when reboot is required after 'apt upgrade' command?
Replies: 6
Views: 290

Re: How do i know when reboot is required after 'apt upgrade' command?

If you don't reboot, the RPi keeps on running the same old stuff as before. The only way to bring in the upgraded material is to reboot. That is true for most any Linux distribution. It is never mandatory...the RPi will keep on trucking as before the upgrade...but you may run into problems if you lo...
by wh7qq
Sun Jan 13, 2019 4:56 pm
Forum: Troubleshooting
Topic: Autostart of executable
Replies: 3
Views: 189

Re: Autostart of executable

Code: Select all

@reboot
is a cron command to perform the following command(s) once at boot up. See:

https://www.maketecheasier.com/beginner ... ron-linux/
by wh7qq
Sun Jan 13, 2019 9:11 am
Forum: Troubleshooting
Topic: Brand new pi zero kernel panics
Replies: 2
Views: 230

Re: Brand new pi zero kernel panics

If you have another working RPi. try swapping the uSD cards. Failing that, verify the sha256sum of your download .zip file against the published sha256 on the downloads page and burn the uSD card again with the download using Etcher. Etcher unzips the file, formats the uSD and burns the image to the...
by wh7qq
Sat Jan 12, 2019 8:41 pm
Forum: Graphics, sound and multimedia
Topic: Capturing multiple audio inputs
Replies: 5
Views: 1477

Re: Capturing multiple audio inputs

You should look at the AudioInjector web site (www.audioinjector.net) , for the "Octo Soundcard". Support has been a bit scanty of late but their forum has been pretty helpful. I have the basic stereo card and I am currently having problems getting it to work from Raspbian Stretch...it previously wo...
by wh7qq
Sat Jan 12, 2019 8:28 pm
Forum: Networking and servers
Topic: IP Camera on ethernet and using internet with wifi
Replies: 1
Views: 381

Re: IP Camera on ethernet and using internet with wifi

As soon as I connect camera to the ethernet wifi connection to router no longer works. That sentence does not make sense to me. For starters, you should disclose the model RPi in use as well as the OS, and the make and model of IP camera. Then, specify how everything is connected and what you are t...
by wh7qq
Sat Jan 12, 2019 8:12 pm
Forum: Troubleshooting
Topic: install ssh server on Raspbian Stretch Lite, i only have access to the sd card
Replies: 3
Views: 597

Re: install ssh server on Raspbian Stretch Lite, i only have access to the sd card

The prescribed way (if you read the instructions) is to add the text file named "ssh" to the top directory of the boot partition (small FAT partition on the SD card), or to enable it via "raspi-config" or the top menu configuration item on the desktop. See https://www.raspberrypi.org/blog/a-security...
by wh7qq
Sat Jan 12, 2019 7:48 pm
Forum: Troubleshooting
Topic: Pi3 Hard disk doesn't spin up
Replies: 1
Views: 94

Re: Pi3 Hard disk doesn't spin up

Even with your 3A, supply, the HD may well exceed the current capability of the USB port. A self powered USB expander might cure your problem.
by wh7qq
Sat Jan 12, 2019 7:41 pm
Forum: Troubleshooting
Topic: Static shock causing false GPIO detection
Replies: 14
Views: 580

Re: Static shock causing false GPIO detection

It is possible to generate some extreme voltages when walking across carpeting, especially synthetics, with leather soled shoes. Steve Wozniak of Apple Computer fame has a nice video on the subject and you can probably find it on line somewhere (try https://www.youtube.com/watch?v=hLOQ7zOWGAA). The ...
by wh7qq
Sat Jan 12, 2019 7:31 pm
Forum: General discussion
Topic: Would a Pi Zero be compatible with this tutorial?
Replies: 9
Views: 522

Re: Would a Pi Zero be compatible with this tutorial?

The zero would probably work but from a very cursory look, the course appears to be pretty "bare metal". The registers on the zero should be pretty much the same as the "A" but you might find some problems...I don't know for sure. You could come back here and ask for some help with that if you encou...

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