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by wh7qq
Fri Jul 26, 2019 9:21 pm
Forum: General discussion
Topic: Using the pi as Hi Fi system.
Replies: 11
Views: 529

Re: Using the pi as Hi Fi system.

Hi There Can anyone help with the following pr point me in the right direction. I am new to using the PI, however I want to re purpose my dads HIFI system and bring him up to the 21st century. Lol . Despite the obvious "ageist" attitude of the above, I offer the following: Check out the AudioInject...
by wh7qq
Mon Jul 22, 2019 10:14 pm
Forum: General discussion
Topic: Arduino shield tft dislay
Replies: 2
Views: 73

Re: Arduino shield tft dislay

You're not getting much response here...you might want to look at the Adafruit tft displays as they may have tutorials for their use that might help you out with a way to go. Google has lots of references to RPis and tft displays. I have no idea of how to do that and you possibly have no option but ...
by wh7qq
Sat Jul 20, 2019 9:12 pm
Forum: General discussion
Topic: Any issues - Logitech Logitech Wireless Touch KB K400r?
Replies: 15
Views: 11594

Re: Any issues - Logitech Logitech Wireless Touch KB K400r?

To pair Logitech unifying receiver to K400 or other Logitech wireless device that uses it directly from the RPi: From https://community.linuxmint.com/tutorial/view/1459 solaar has an official PPA. Add the PPA like this: sudo add-apt-repository ppa:daniel.pavel/solaar sudo apt-get update Now install ...
by wh7qq
Fri Jul 19, 2019 9:48 pm
Forum: General discussion
Topic: I NEED HELP TO FIND A SENSOR THAT MEASURES OXYGEN
Replies: 5
Views: 246

Re: I NEED HELP TO FIND A SENSOR THAT MEASURES OXYGEN

You don't mention the measurement range required or the output characteristics you need. Also, the nature of your application...automotive, aeronautical, medical...all make a difference in the manufacturer's cost burden, hence your price. From just a cursory search, the 44 euro price looks ok...most...
by wh7qq
Fri Jul 19, 2019 2:58 am
Forum: General discussion
Topic: Error Updating and Upgrading or installing packages
Replies: 9
Views: 634

Re: Error Updating and Upgrading or installing packages

I've never seen this type of error from an update/upgrade..."403 error" is an http status code that you would get from a web page. Are you working from a terminal window or a browser? These commands must be run from a terminal or a terminal window (hope that isn't too obvious). Stretch should still ...
by wh7qq
Fri Jul 19, 2019 2:17 am
Forum: General discussion
Topic: From where should i download raspbian stretch with desktop and raspbian stretch with desktop and recommended software
Replies: 9
Views: 210

Re: From where should i download raspbian stretch with desktop and raspbian stretch with desktop and recommended softwar

This labors the obvious but the files you want are right here...this page. If you open the 3 heavy lines at the extreme right-top of this page, you will see on the left a large band marked "Downloads". Select that and follow the instructions. This has all been changed recently, not for the better IM...
by wh7qq
Fri Jul 19, 2019 1:14 am
Forum: General discussion
Topic: is JB weld good idea to attach HeatSink to 4b ?
Replies: 7
Views: 380

Re: is JB weld good idea to attach HeatSink to 4b ?

3M heatsink tape has had good reviews here...thin and easy to use. Personally, as I never expect to reuse the heatsinks, I have used Arctic aluminum epoxy with good success but it has to be applied in a thin, even coat and avoid the contacts on the edge. It is permanent once cured. The black, gooey,...
by wh7qq
Wed Jul 17, 2019 8:00 pm
Forum: General discussion
Topic: Can i use this charger on my Raspberry?
Replies: 3
Views: 305

Re: Can i use this charger on my Raspberry?

As has been repeated many times in these forums, phone chargers, regardless of current rating, may not have proper voltage regulation to maintain the RPi's narrow range under load and may create unreliable operation/failures particularly at start-up. Chargers need only produce sufficient voltage to ...
by wh7qq
Wed Jul 17, 2019 7:46 pm
Forum: General discussion
Topic: Pi4b cooling fan wirerd to TP No??
Replies: 12
Views: 718

Re: Pi4b cooling fan wirerd to TP No??

Be sure to add a reverse diode (anode to positive) across the fan leads. It may already be built into the fan but they don't tell you. 1N4001 and the like. When the motor turns off, an inductive spike may occur that could damage the RPi. Ohm's law definitely does not apply to motors...they are a par...
by wh7qq
Tue Jul 16, 2019 1:03 am
Forum: General discussion
Topic: Raspberry Pi 4 4GB slow transfer speeds
Replies: 7
Views: 849

Re: Raspberry Pi 4 4GB slow transfer speeds

Did you do a fresh burn to a uSD card with the current Raspbian_latest on the RPi4 itself or just try to upgrade your prior installation or use the RPi2 for the burn? I believe I saw information on this forum to the effect that software burned on prior models was not forward compatible to the 4 due ...
by wh7qq
Wed Jul 10, 2019 1:34 am
Forum: General discussion
Topic: PI4B and Raspbian challenge - Use as main computer a fortnight.
Replies: 36
Views: 2006

Re: PI4B and Raspbian challenge - Use as main computer a fortnight.

Give me a break...did this with a 3B months ago...ran that way for months and it was OK so long as I didn't open too many browser tabs. A 4B would be no challenge at all but I recommend at least 2G of RAM for all but the masochistic.
by wh7qq
Wed Jul 10, 2019 1:23 am
Forum: General discussion
Topic: Want to measure battery volts
Replies: 38
Views: 1619

Re: Want to measure battery volts

The ADS1115 or its cousin, the ADS1015 are both fine A-D converters but are gross overkill for what you are trying to do. If you have not already purchased an RPi and ADS1115, you might consider the Arduino Uno which has 6, ten bit analog inputs which is more than sufficient to your need. A nice tut...
by wh7qq
Tue Jul 09, 2019 4:01 am
Forum: General discussion
Topic: Starting up
Replies: 14
Views: 523

Re: Starting up

[/quote] Thanks. Card came direct in desktop kit bought from store. I thought this would stop any fun and games and set up would be simple.....all good lessons here for sure. But seems I am best heading back to the store (6 hour round trip!) [/quote] I sure would not drive a long way to go back to t...
by wh7qq
Mon Jul 08, 2019 8:03 pm
Forum: General discussion
Topic: 3M tape with heatsink
Replies: 7
Views: 632

Re: 3M tape with heatsink

First off, the RPi will throttle well in advance of any damage to chip or flesh. Subsequently the command line vcgencmd measure_temp I suggest vcgencmd get_throttled It shows (1) if the Pi is throttled, (2) if it has throttled since last boot, or if there are/have been other problems such as under ...
by wh7qq
Mon Jul 08, 2019 7:34 pm
Forum: General discussion
Topic: IoT home project setup
Replies: 3
Views: 185

Re: IoT home project setup

You might want to look at VPNs to eliminate having to update the cloud with your IP. If used properly, they are also more secure than having direct access from the web or wifi.
by wh7qq
Mon Jul 08, 2019 7:23 pm
Forum: General discussion
Topic: Starting up
Replies: 14
Views: 523

Re: Starting up

If, as you say, it is indeed the fit between the SD card and the PC board, sometimes a small piece of transparent tape on the side of the SD opposite the contacts is the fix. This has happened on one of my older uSD cards. If you use the tape, take care not to overlap the edges, allowing the tape to...
by wh7qq
Sun Jul 07, 2019 8:13 pm
Forum: General discussion
Topic: Starting up
Replies: 14
Views: 523

Re: Starting up

The first guess is the SD card. Is it fully inserted the correct way (contacts to PC board)? Do you see any text on the boot screen or raspberry's at the top? On a working computer, download the latest Raspbian image (forget NOOBS) and use Etcher to unzip it and burn it to the SD card. If that goes ...
by wh7qq
Sun Jul 07, 2019 6:40 pm
Forum: General discussion
Topic: 3M tape with heatsink
Replies: 7
Views: 632

Re: 3M tape with heatsink

The heat-sink and tape in the Amazon reference look good and adequate but it may be unnecessary to go to the bother. First off, the RPi will throttle well in advance of any damage to chip or flesh. Subsequently the command line vcgencmd measure_temp will return the actual measured chip temp in degre...
by wh7qq
Sat Jul 06, 2019 9:06 pm
Forum: General discussion
Topic: 3M tape with heatsink
Replies: 7
Views: 632

Re: 3M tape with heatsink

The 3M tape is probably a better choice than the black, gooey excrement that some heat sink mfgrs provide. I used that on my 3B which was overheating on some of the bigger Adafruit tutorials with a lot of java and it barely made any difference in the problem. I scraped it off and cleaned the residua...
by wh7qq
Thu Jul 04, 2019 2:03 am
Forum: General discussion
Topic: Connecting Raspberry Pi to existing bilge alarm
Replies: 1
Views: 84

Re: Connecting Raspberry Pi to existing bilge alarm

Assuming you have an existing wifi or ethernet connection to the vessel: It is pretty trivial to convert the output from existing float switches and other water level devices (you don't tell us what you have) to a GPIO pin. A python or bash script can handle the email message. This is not tuff and t...
by wh7qq
Sat Jun 29, 2019 6:08 pm
Forum: General discussion
Topic: (pi4) so how fast is 'entry level pc performance'
Replies: 37
Views: 2595

Re: (pi4) so how fast is 'entry level pc performance'

Not sure how this relates to the RPi 4 but my "speedometer 2.0" ran a ripping 16.2 mean. Considering my long satellite latency is a factor so it may be a poor point of reference. On what system?. On the x86 system described above based on the Celeron J3455. Web performance seems to be about the sam...
by wh7qq
Sat Jun 29, 2019 3:47 am
Forum: General discussion
Topic: (pi4) so how fast is 'entry level pc performance'
Replies: 37
Views: 2595

Re: (pi4) so how fast is 'entry level pc performance'

Not sure how this relates to the RPi 4 but my "speedometer 2.0" ran a ripping 16.2 mean. Considering my long satellite latency is a factor so it may be a poor point of reference.
by wh7qq
Sat Jun 29, 2019 12:25 am
Forum: General discussion
Topic: (pi4) so how fast is 'entry level pc performance'
Replies: 37
Views: 2595

Re: (pi4) so how fast is 'entry level pc performance'

My current x86-64 is pretty much "entry level" by my lights. It is an Asrock J3455 mobo with 4G of LPDDR3 and boots from a 240G SSD. The mobo runs a Celeron 3455 4 core CPU. This may be a basis for comparison but not documented with benchmark testing. I use the onboard Intel Graphics and the onboard...
by wh7qq
Fri Jun 28, 2019 1:12 am
Forum: General discussion
Topic: Raspberry Pi 4 Heatsink vs Fan vs Flirc Case
Replies: 30
Views: 7296

Re: Raspberry Pi 4 Heatsink vs Fan vs Flirc Case

I already told you, in the manual. Specifically section 5.6 on the bottom of page 11 The 50°C you are referring to is ambient maximum. If this isn't acceptable, here is a post by a Raspberry Pi engineer. https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=243713&p=1486109#p1486109 Indeed. I saw...
by wh7qq
Thu Jun 27, 2019 3:28 am
Forum: General discussion
Topic: Raspberry Pi 4 Heatsink vs Fan vs Flirc Case
Replies: 30
Views: 7296

Re: Raspberry Pi 4 Heatsink vs Fan vs Flirc Case

That said, the RPi 4 has a maximum operating temp of 50 C according to their published specs so it may require both sink and fan to keep it below that line under normal conditions. Where did you read that. The manual I read says 85°C like all previous Pi models. Somewhere on this site...it surprise...

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