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by wh7qq
Thu Jan 31, 2019 6:49 pm
Forum: Troubleshooting
Topic: Raspberry Pi 3 B+ portable power source
Replies: 6
Views: 622

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: 732

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: 897

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: 670

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: 766

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: 766

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: 858

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: 858

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: 247

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: 414

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: 636

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: 1078

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: 213

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: 691

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/...
by wh7qq
Fri Jan 25, 2019 2:53 am
Forum: Troubleshooting
Topic: RPi B3 do not stay on
Replies: 13
Views: 601

Re: RPi B3 do not stay on

I stand corrected...blame my careless terminology on advanced age. The 317 and other 3 terminal types use a "series pass" transistor for regulation and excess input voltage is dumped as heat in the pass transistor junction. I tend to lump series pass or shunt type, linear regulators as "heaters" and...
by wh7qq
Fri Jan 25, 2019 12:32 am
Forum: Troubleshooting
Topic: RPi B3 do not stay on
Replies: 13
Views: 601

Re: RPi B3 do not stay on

The lm317 is very handy in that it allows simple adjustment of output voltage but any linear regulator is a "shunt type regulator" that wastes the excess energy as heat to maintain the designed voltage level. A quick and cursory look at TI's data http://www.ti.com/lit/ds/slvs044x/slvs044x.pdf on thi...
by wh7qq
Thu Jan 24, 2019 6:35 pm
Forum: Troubleshooting
Topic: RPi B3 do not stay on
Replies: 13
Views: 601

Re: RPi B3 do not stay on

It sounds like a power supply issue...either the supply or the connecting cable. I haven't looked at the LM317 data sheet for a while but if I recall, it is only good for 1-1 1/2 amps using a heat sink and the 3b+ recommended minimum supply voltage is 2.5. You are putting some additional loads on it...
by wh7qq
Thu Jan 24, 2019 6:26 pm
Forum: Beginners
Topic: Unable to Update
Replies: 7
Views: 612

Re: Unable to Update

It looks as though you are doing "something else" that you have not bothered to tell us about...all those ubuntu references do not show up in a normal Raspbian update/upgrade. That changes everything and I can't advise you on that except to do a fresh download of whatever it is and update/upgrade th...
by wh7qq
Thu Jan 24, 2019 6:26 am
Forum: Graphics, sound and multimedia
Topic: Capturing multiple audio inputs
Replies: 5
Views: 1944

Re: Capturing multiple audio inputs

I subsequently have ironed out my problems with the AI Stereo on Stretch. As a result of a use hiatus...6 months or so... I screwed up the alsamixer settings. It is working like a champ now...perfect recordings from my vinyl and cassettes. It was all my fault and none of the AI Stereo Card's. The "O...
by wh7qq
Thu Jan 24, 2019 6:10 am
Forum: Beginners
Topic: Unable to Update
Replies: 7
Views: 612

Re: Unable to Update

You don't need to post the log...just the output from "sudo apt..". Do a Ctl-Shft-C in your console to copy a highlighted area and a Ctl-V in your posting here to paste it.
by wh7qq
Wed Jan 23, 2019 7:13 pm
Forum: Automation, sensing and robotics
Topic: UR10 and RPi
Replies: 5
Views: 726

Re: UR10 and RPi

So what is a UR10?
by wh7qq
Wed Jan 23, 2019 7:05 pm
Forum: General discussion
Topic: Boot from HDD and boot wait times
Replies: 8
Views: 542

Re: Boot from HDD and boot wait times

There is no bios on the RPi. Everything is on the uSD or the bootable USB drive. If you are using a spinning disk, it should be powered from a separate, self powered USB hub. This is an old problem: see https://www.raspberrypi.org/forums/viewtopic.php?t=41911 or do your own search online for more re...
by wh7qq
Wed Jan 23, 2019 6:56 pm
Forum: Troubleshooting
Topic: Raspberry Pi 3B: WiFi connects but won't access internet
Replies: 9
Views: 421

Re: Raspberry Pi 3B: WiFi connects but won't access internet

That was not your wpa_supplicant.conf file but your /etc/network/interfaces. Show /etc/wpa_supplicant/wpa_supplicant.conf.

You should learn to do a copy/paste (ctl-c/ctl-v) to post the files as quotes rather than the hard to read pictures of your screen.
by wh7qq
Wed Jan 23, 2019 4:35 pm
Forum: Troubleshooting
Topic: Raspberry Pi 3B: WiFi connects but won't access internet
Replies: 9
Views: 421

Re: Raspberry Pi 3B: WiFi connects but won't access internet

It would help if you would show your wpa_supplicant.conf file. Raspbian will not connect to wifi unless the WPA2 passphrase is used along with several other seemingly minor things in that file.
by wh7qq
Wed Jan 23, 2019 4:28 pm
Forum: Beginners
Topic: Unable to Update
Replies: 7
Views: 612

Re: Unable to Update

Can you show us the error messages generated by apt? Mirrors do go down occasionally for various reasons and may be down for several days. The fix is to wait and try later. Ad blocking can sometimes prevent access to mirrors. I recently discovered my "Pi-hole" ad blocker was blocking the mirror that...

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