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by wh7qq
Thu Jun 27, 2019 3:28 am
Forum: General discussion
Topic: Raspberry Pi 4 Heatsink vs Fan vs Flirc Case
Replies: 68
Views: 16728

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...
by wh7qq
Thu Jun 27, 2019 3:25 am
Forum: General discussion
Topic: Raspberry Pi 4 Heatsink vs Fan vs Flirc Case
Replies: 68
Views: 16728

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...
by wh7qq
Wed Jun 26, 2019 8:12 pm
Forum: General discussion
Topic: Can the Cortex-A73 be replaced?
Replies: 5
Views: 696

Re: Can the Cortex-A73 be replaced?

Actually its quite simple! Take 1 Pi Take 1 chisel Get new processor Get glue (two part epoxy) Put chisel to Pi processor and push Take new processor Apply glue to processor Apply hardener to Pi (love a crisp crust) Stick processor on Pi To get it working - use the $35 - $55 fix cream... Not the be...
by wh7qq
Wed Jun 26, 2019 7:58 pm
Forum: General discussion
Topic: Raspberry Pi 4 Heatsink vs Fan vs Flirc Case
Replies: 68
Views: 16728

Re: Raspberry Pi 4 Heatsink vs Fan vs Flirc Case

The answer depends on what you are doing with the RPi 4. Small heat-sinks made a big difference on my RPi 3B but the heat-sink adhesive tapes tend to be a better insulator than conductor. I attached mine with Arctic brand epoxy and went from frequent throttles on web pages with lots of java crap to ...
by wh7qq
Wed Jun 26, 2019 7:44 pm
Forum: General discussion
Topic: Posture Sensor
Replies: 3
Views: 304

Re: Posture Sensor

Good luck finding a parameter to monitor that is sufficiently specific and relatively non-invasive. When you have that figured out, we might be able to help you. Right now, the question(s) is too vague. Actually two questions in one...what to monitor and how to do it.
by wh7qq
Wed Jun 26, 2019 6:33 pm
Forum: General discussion
Topic: Why is the RPi4 being advertised as a desktop computer?
Replies: 114
Views: 11245

Re: Why is the RPi4 being advertised as a desktop computer?

The RPi4 with a full memory load probably blows off my x86-64 desktop. I tried to run the RPi3 as a desktop and it wasn't speed so much as the 1 gig memory limit that caused me to give up on it...I like to open a few more browser tabs than it would allow. That, the slow USB 2.0 and so on were to bla...
by wh7qq
Tue Jun 25, 2019 7:18 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 895
Views: 96263

Re: Raspberry Pi 4 Thread - general discussion

The enhancement I crave is to print the model number in a larger font on the board. My eyesight isn't what it was! I was having that problem, but a lot of it was solved last year when I had cataract surgery on my eyes. (NOT that I'm suggesting seeking to do that, but talk to your opthamologist if y...
by wh7qq
Tue Jun 18, 2019 6:30 pm
Forum: General discussion
Topic: Raspberry Pi Zero W board - Deep Sleep Mode configuration and wake up
Replies: 3
Views: 302

Re: Raspberry Pi Zero W board - Deep Sleep Mode configuration and wake up

The WittyPi Mini or WittyPi 2 from uugear.com might just fill your bill.
by wh7qq
Wed Jun 12, 2019 7:16 pm
Forum: General discussion
Topic: DIY OpenVPN
Replies: 1
Views: 176

DIY OpenVPN

I saw this in LXer.com this morning. https://www.iottechtrends.com/set-up-ho ... pberry-pi/Perfect for anyone looking for a job for their RPi or someone looking to protect all their IoT stuff or....
by wh7qq
Mon Jun 10, 2019 4:31 pm
Forum: General discussion
Topic: How do I keep my Pi clean?
Replies: 16
Views: 922

Re: How do I keep my Pi clean?

If you really need the fan to keep the RPi cool, you should keep in mind that any filter you put in the way of airflow will reduce the efficiency of the fan. More filter = more airflow loss. Keep checking "vcgencmd measure_temp" to be sure. Unless you overheat or throttle due to heat in normal use, ...
by wh7qq
Thu Jun 06, 2019 7:26 pm
Forum: General discussion
Topic: marine navigation
Replies: 6
Views: 625

Re: marine navigation

To the dismay and neglect of my wife and child, I sailed a C27 for 11 or 12 years nearly every weekend and can say unequivocally that the simile to a VW microbus is way off the mark...for what they were/are, they were a quick and solid little sail boat. At the time I sold mine, there were more of th...
by wh7qq
Tue Jun 04, 2019 1:32 am
Forum: General discussion
Topic: Audio input raspberry pi 3
Replies: 4
Views: 271

Re: Audio input raspberry pi 3

Not sure if this is your solution but it is worthy of further investigation: the AudioInjector "Octo" soundcard that features up to 8 analog inputs. I am unsure of its ability to handle low level inputs such as microphones but you might find some insight on their Octo pages on their forum: http://fo...
by wh7qq
Fri May 17, 2019 8:15 pm
Forum: General discussion
Topic: Danger of high voltage from HDMI cable
Replies: 11
Views: 819

Re: Danger of high voltage from HDMI cable

This thread is of considerable interest to me as in a prior life, I was a biomed tech in a hospital and one of my duties was to see that everything metallic within the patient's reach was at iso-potential ground. Most hospital rooms now have the TVs mounted high on the wall and out of reach but hard...
by wh7qq
Wed Mar 27, 2019 12:47 am
Forum: General discussion
Topic: Sterilization of Pi
Replies: 27
Views: 1644

Re: Sterilization of Pi

I perhaps learned more about sterilizing endoscopes than I ever wanted to. Please...not "sterilizing" but "disinfecting". Sterilizing means NO viable bugs. Disinfecting means "few", but not the same as "Sterile". ...but there is dry-heat sterilization also https://en.wikipedia.org/wiki/Dry_heat_ste...
by wh7qq
Sat Mar 23, 2019 8:33 pm
Forum: General discussion
Topic: Sterilization of Pi
Replies: 27
Views: 1644

Re: Sterilization of Pi

Careful testing required! According to wikipedia Ethyle oxide is often used for sterilization of electronics: "Ethylene oxide is one of the most commonly used sterilization methods in the healthcare industry because of its non-damaging effects for delicate instruments and devices that require steril...
by wh7qq
Sat Mar 23, 2019 4:05 am
Forum: General discussion
Topic: Sterilization of Pi
Replies: 27
Views: 1644

Re: Sterilization of Pi

Sterilized? If any human use is contemplated, I would expect the mods to have plenty to say on that subject. The country's regulatory agencies (FDA, etc.) definitely would. As there are lots of plastics and other compounds in use in the RPi they need to be tested for survival with the actual sterila...
by wh7qq
Wed Mar 20, 2019 7:45 pm
Forum: General discussion
Topic: Pi Zero USB hub
Replies: 96
Views: 72585

Re: Pi Zero USB hub

The "Zero4U", http://www.uugear.com/product/zero4u/ is dirt cheap and works great. It mounts under the RPi Zero and is powered by pogo pins in contact with the powered contacts on the bottom of the Zero. It has 4 standard USB ports with white LEDs indicating ports in use and a blue LED showing its p...
by wh7qq
Tue Mar 12, 2019 7:39 pm
Forum: Troubleshooting
Topic: RPi 0 W wifi dropouts
Replies: 2
Views: 189

Re: RPi 0 W wifi dropouts

I ran it as you suggested...power management is still on and still showing accumulating excessive TX retries but I will let it run for a while and see how it does. I did have to add "apt" before "install" in your commands ;) . Thanks for the response in any case.
by wh7qq
Mon Mar 11, 2019 3:57 am
Forum: Troubleshooting
Topic: RPi 0 W wifi dropouts
Replies: 2
Views: 189

RPi 0 W wifi dropouts

My RPi 0 W was working flawlessly until an update/upgrade yesterday. It runs headless about 6 meters from the router and remote from usual monitoring and access. It runs Raspbian Stretch (11/18) with Desktop. Now the wireless drops out shortly after a reboot. This is in spite of a crontab line that ...
by wh7qq
Fri Feb 01, 2019 1:44 am
Forum: General discussion
Topic: Translation issues
Replies: 49
Views: 2451

Re: Translation issues

A lot of folks here proclaiming their ignorance. I am just trying to improve communication and expand support where often one is inclined to simply pass over an incomprehensible posting. Is that a bad idea? How did this somehow become about me and my nickname and not the topic I raised? Argumentum a...
by wh7qq
Thu Jan 31, 2019 9:12 pm
Forum: General discussion
Topic: Translation issues
Replies: 49
Views: 2451

Re: Translation issues

If I were English challenged, it would make lots of sense. If you just don't like the Yankee accent, that is your problem. Actually, my use of my Hawaiian US amateur radio call sign as a nickname pretty well nails down my location. Seemed silly and redundant to specify the obvious.
by wh7qq
Thu Jan 31, 2019 8:00 pm
Forum: General discussion
Topic: Translation issues
Replies: 49
Views: 2451

Translation issues

I have seen a large number of posts that are really difficult to understand. It occurs to me that some of this may be related more to non-English speakers using online translator facilities to post requests originally written in the poster's native tongue. The online translators have a nasty habit o...
by wh7qq
Thu Jan 31, 2019 7:07 pm
Forum: General discussion
Topic: understanding regulator frame work
Replies: 4
Views: 436

Re: understanding regulator frame work

drgeoff is right...the CPU in the RPi requires the 3.3 volts to operate and the 5 volt level is required to run some of the other bits on the board like the USB ports. 3.3 volts is derived for that purpose and is available at the 3.3 v terminals at a very limited current level (not specified AFAIK)....
by wh7qq
Thu Jan 31, 2019 6:59 pm
Forum: General discussion
Topic: Cannot download NOOBS
Replies: 5
Views: 378

Re: Cannot download NOOBS

You have not mentioned the area you are working in so it is possible that the mirror for that location is not working or is overloaded. Try it late at night or wait a day or so. I recently discovered that my pi-hole ad blocker was blocking a server and it took whitelisting that server to upgrade my ...
by wh7qq
Thu Jan 31, 2019 6:49 pm
Forum: Troubleshooting
Topic: Raspberry Pi 3 B+ portable power source
Replies: 6
Views: 621

Re: Raspberry Pi 3 B+ portable power source

Unfortunately, the dealer is probably right. Power supplies designed for smart phones may not work because they do not provide the narrow range of voltage required by the RPi under all load conditions. For this reason, it can be a challenge to find a "power bank" that will work. The recommended supp...

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