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by wh7qq
Wed Mar 27, 2019 12:47 am
Forum: General discussion
Topic: Sterilization of Pi
Replies: 27
Views: 1109

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: 1109

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: 1109

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: 66814

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: 115

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: 115

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: 1686

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: 1686

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: 1686

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: 256

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: 244

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: 345

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...
by wh7qq
Thu Jan 31, 2019 6:44 am
Forum: Raspbian
Topic: Ethernet Problems
Replies: 10
Views: 476

Re: Ethernet Problems

Most router firmware has a way to make an IP static and it ties to the Mac address of the device in question. That is the easiest approach. I have no idea what you have done already so it may just be easier to start from scratch: Download .zip, verify sha256sum, burn to uSD with Etcher. When the des...
by wh7qq
Thu Jan 31, 2019 3:54 am
Forum: Troubleshooting
Topic: The most stubborn pi3 around. I HAVE GONE UP AND DOWN THE STICKY
Replies: 17
Views: 622

Re: The most stubborn pi3 around. I HAVE GONE UP AND DOWN THE STICKY

Humor me and try this just as I have written it (at least for now, forget the stickies): Download a fresh .zip file of the latest Raspbian Stretch with desktop...not Noobs, the torrent or anything else. Verify the sha256sum of your download (.zip file) against the published value. There are free uti...
by wh7qq
Thu Jan 31, 2019 1:14 am
Forum: Camera board
Topic: Camera V2.1 not (or no longer) working on Pi Zero W
Replies: 4
Views: 399

Re: Camera V2.1 not (or no longer) working on Pi Zero W

There have been a number of posts here on the fragility of the camera connector on the RPi Zero...any variant...due to its small size and delicacy. That is the most likely scenario for your problem. If the tiny black locking bar is still intact, you might try using a small bit of transparent tape on...
by wh7qq
Thu Jan 31, 2019 12:56 am
Forum: Camera board
Topic: LISIPAROI LED Light Ring IR
Replies: 4
Views: 370

Re: LISIPAROI LED Light Ring IR

I have no idea...have not used them but had seen these or something similar in another user's post. Looked as though there were a number of them on the market so characteristics may vary from one to the next. They are so cheap that it invites experimentation with a power supply (no RPi or camera inv...
by wh7qq
Tue Jan 29, 2019 9:22 pm
Forum: Camera board
Topic: LISIPAROI LED Light Ring IR
Replies: 4
Views: 370

Re: LISIPAROI LED Light Ring IR

How about 4 of them for very little $$.

https://www.amazon.com/Qisheng-Infrared ... +LED+board
by wh7qq
Tue Jan 29, 2019 9:16 pm
Forum: Troubleshooting
Topic: RasPi B+ not power on
Replies: 14
Views: 549

Re: RasPi B+ not power on

Misread...for some reason thought I saw 2.

If it boots fine with a official power supply, the cause is pretty clear...the 48v supply with buck regulator, or the connecting cable. How are you connecting...using what? The B+ on its own doesn't draw much. What is sharing the power?
by wh7qq
Tue Jan 29, 2019 4:27 pm
Forum: Troubleshooting
Topic: RasPi B+ not power on
Replies: 14
Views: 549

Re: RasPi B+ not power on

Is your RPi a 3B+ or a B+...big difference. The 2A output would not be sufficient for two 3B+ RPis. One maybe, although 2.5 A is recommended.
by wh7qq
Tue Jan 29, 2019 5:58 am
Forum: General discussion
Topic: DS-5 can be connected to raspberry pi?
Replies: 3
Views: 168

Re: DS-5 can be connected to raspberry pi?

It is an arm debugging tool or something of the sort but it took 3 trips to Startpage to finally get to that...as in "WTF is DS-5?". The first two trips resulted in references to a nice looking Citroen. From their web page: Note: DS-5 is supported on 64-bit x86 host platforms only. so the answer is ...
by wh7qq
Sun Jan 27, 2019 5:02 pm
Forum: Camera board
Topic: 24 LED IR Board with Raspberry Pi Zero and Camera
Replies: 4
Views: 281

Re: 24 LED IR Board with Raspberry Pi Zero and Camera

If you can make it all fit in the dummy case, that part is probably good. The problem comes as you try to power it, as the IR LED board wants 12V power and the RPi and camera can tolerate only 5V. You will need separate voltage sources for the two devices. The case looks to be metal and that will pr...
by wh7qq
Sat Jan 26, 2019 6:17 pm
Forum: Raspbian
Topic: Updating APT to Avoid MitM Attacks(CVE-2019-3462)
Replies: 3
Views: 504

Re: Updating APT to Avoid MitM Attacks(CVE-2019-3462)

The updated "apt" packages should be showing up pretty quickly in the RPi repositories, having been modified for arm v6 and checked for dependencies and problems. As this is a security type update, it will come in pretty quickly. It is probably safer to wait and do daily upgrades to get the complete...
by wh7qq
Sat Jan 26, 2019 5:05 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi Zero W and USB audio
Replies: 3
Views: 367

Re: Raspberry Pi Zero W and USB audio

Your USB device is not loaded automatically at boot unless you have that "device tree" in the /boot/config.txt file. The device tree is loaded by including the line dtoverlay= USB Audio [USB Audio] at the bottom of the /boot/config.txt file and commenting out (place "#" as the first character in the...
by wh7qq
Sat Jan 26, 2019 6:01 am
Forum: Troubleshooting
Topic: Pi 3 loses Ethernet connectivity
Replies: 1
Views: 109

Re: Pi 3 loses Ethernet connectivity

Baffling on the surface. Usually, ethernet connections are like a rock. I also use a 3B, a zero and a B+,various x86 desktops and RPis connected by ethernet and wifi via my old reliable Asus RT-N 66U and have never seen such an issue. The zero and B+ are both headless. As you seem always to have con...
by wh7qq
Fri Jan 25, 2019 4:20 am
Forum: Beginners
Topic: ECG signal monitoring
Replies: 2
Views: 293

Re: ECG signal monitoring

If you haven't already found it, https://www.sparkfun.com/products/12650 has some information on usage of the AD8232 that you might find useful. the ADS 1115 is among the Adafruit product line and they may have some info on the hookup and use of it with the RPi. See https://www.adafruit.com/product/...

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