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by drgeoff
Mon Aug 20, 2018 3:48 pm
Forum: Troubleshooting
Topic: Wi-Fi Hotspot
Replies: 2
Views: 63

Re: Wi-Fi Hotspot

How much better is the on-board wi-fi compared to a USB wi-fi network adapter plugged into one of the USB ports? No one can give you a definitive answer to that without knowing what nameless USB Wi-Fi adaptor you are referring to. Even knowing that you are unlikely to get an answer that will accura...
by drgeoff
Mon Aug 20, 2018 3:39 pm
Forum: General discussion
Topic: Application pc on raspberry pi 3b
Replies: 4
Views: 151

Re: Application pc on raspberry pi 3b

With vnc can I play game or its just for application ( photoshop, after effect...) VNC merely "copies" the screen of one computer to another computer. Network and processing power limitations put some constraints on the rate at which the remote screen can be updated. If you want o play modern PC ga...
by drgeoff
Mon Aug 20, 2018 11:48 am
Forum: Beginners
Topic: can't boot PI3 after dropping the heat sink onto the board by accident
Replies: 16
Views: 266

Re: can't boot PI3 after dropping the heat sink onto the board by accident

hippy wrote:
Mon Aug 20, 2018 10:16 am
I think they could have a good case for blaming the accident on others not telling them not to do what they attempted to do.
After washing poodle, do not put it in microwave oven to dry.
by drgeoff
Mon Aug 20, 2018 11:40 am
Forum: General discussion
Topic: RPi3 's usb port fail
Replies: 4
Views: 106

Re: RPi3 's usb port fail

Wireless mouse and keyboard set? With its own USB wireless dongle?
by drgeoff
Sun Aug 19, 2018 3:43 pm
Forum: Beginners
Topic: 64 gb mini sd card
Replies: 6
Views: 151

Re: 64 gb mini sd card

grandpa wrote:
Sun Aug 19, 2018 12:41 pm
I tried to use a 64gb mini sd card to setup my pi zero.
For future reference get the terminology correct. It is a micro-SD card.
by drgeoff
Sat Aug 18, 2018 8:12 pm
Forum: Beginners
Topic: No video out of jack socket. Pi3 B+
Replies: 25
Views: 325

Re: No video out of jack socket. Pi3 B+

Mikexx wrote:
Sat Aug 18, 2018 7:19 pm
I was doing very well, but on trying to save I get "Cannot open file to write"!
Files in /boot are read-only to user pi. Preface the file opening command with sudo.
by drgeoff
Sat Aug 18, 2018 2:23 pm
Forum: Beginners
Topic: No video out of jack socket. Pi3 B+
Replies: 25
Views: 325

Re: No video out of jack socket. Pi3 B+

Is it a PAL/NTSC issue I wonder No, a mismatch between the PAL/NTSC setting on the RPi and the PAL/NTSC/SECAM ability of the TV never results in nothing recognisable as being from the RPi appearing on the screen. Might lack colour, might roll up or down but it will be visible. If there was any vide...
by drgeoff
Sat Aug 18, 2018 1:54 pm
Forum: Beginners
Topic: No video out of jack socket. Pi3 B+
Replies: 25
Views: 325

Re: No video out of jack socket. Pi3 B+

mattmiller wrote:
Sat Aug 18, 2018 1:45 pm
Is it a PAL/NTSC issue I wonder
No, a mismatch between the PAL/NTSC setting on the RPi and the PAL/NTSC/SECAM ability of the TV never results in nothing recognisable as being from the RPi appearing on the screen. Might lack colour, might roll up or down but it will be visible.
by drgeoff
Sat Aug 18, 2018 1:43 pm
Forum: Beginners
Topic: No video out of jack socket. Pi3 B+
Replies: 25
Views: 325

Re: No video out of jack socket. Pi3 B+

Read the "not booting" sticky. Use CRTL-F to find the sentence that starts "Booting to NOOBS works a bit differently: it will always output .." Read the rest of that paragraph.
by drgeoff
Sat Aug 18, 2018 9:36 am
Forum: Networking and servers
Topic: LTE-4G signal strength measurement by Raspberry Pi
Replies: 16
Views: 306

Re: LTE-4G signal strength measurement by Raspberry Pi

Also some oscilloscope has a "build" in spectrum analyser. But not so good as a real one. Yes some digital storage scopes have a spectrum analyser function. However they do that by FFT on the sampled signal. The raw LTE RF signals are at a couple of GHz. If a digital scope exists that can do spectr...
by drgeoff
Sat Aug 18, 2018 9:22 am
Forum: Advanced users
Topic: Floating input on industrial usage
Replies: 8
Views: 237

Re: Floating input on industrial usage

mikronauts wrote:
Fri Aug 17, 2018 11:19 pm
..use a proper voltage divider instead of just a 10k resistor (may damage Pi with just that resistot)
Not so. The only voltages on the RPi side of the opto are ground and 3.3 volts. 3.3 volts is safe without a voltage divider.
by drgeoff
Sat Aug 18, 2018 9:18 am
Forum: Advanced users
Topic: Floating input on industrial usage
Replies: 8
Views: 237

Re: Floating input on industrial usage

The other question is which GPIO pin are you using and which naming scheme are you using to access it? (BCM, Board, WiringPi?) It may be you are not reading the pin you think you are reading. I doubt that is the issue. The OP wrote "I'm sure it's the machine generating much perturbations, same circ...
by drgeoff
Fri Aug 17, 2018 9:18 pm
Forum: Beginners
Topic: PWM AC Dimmer
Replies: 18
Views: 317

Re: PWM AC Dimmer

But that your probably only going to be able to run it at 100% and one other level without it humming and vibrating anoyingly I think that "two levels" is a bad translation from the original German and was meant to mean two axes or two directions or something like that. Not that the fan will hum or...
by drgeoff
Fri Aug 17, 2018 9:10 pm
Forum: Beginners
Topic: No video out of jack socket. Pi3 B+
Replies: 25
Views: 325

Re: No video out of jack socket. Pi3 B+

I can get a screen with HDMI so it boots fine, but nothing out of the Jack. I thought the Jack output was the default unless a HDMI cable was plugged in? "Pure" Raspbian (Ie not installed using NOOBS) with default config.txt will output composite video if booted with HDMI disconnected. If booted to...
by drgeoff
Fri Aug 17, 2018 12:52 pm
Forum: Advanced users
Topic: Floating input on industrial usage
Replies: 8
Views: 237

Re: Floating input on industrial usage

What do you mean by "floating"? Do you mean the RPi is seeing the GPIO input changing between 0 and 1 and the reverse even with only the 10k resistor connected?

Are there high electrical or magnetic fields where the RPi is at the machine?
by drgeoff
Fri Aug 17, 2018 9:42 am
Forum: Troubleshooting
Topic: Press "next" to get started.
Replies: 12
Views: 209

Re: Press "next" to get started.

DarkPlatinum wrote:
Fri Aug 17, 2018 8:17 am
Buy a cheap-o mouse and click continue :P
@DarkPlatinum

The OP wrote (my emphasis):

"but neither wired or wireless mouse/kbd are responding!"

which, although grammatically incorrect, makes me suspect that acting on your suggestion will be turn out to be fruitless.
by drgeoff
Thu Aug 16, 2018 6:45 pm
Forum: Troubleshooting
Topic: Press "next" to get started.
Replies: 12
Views: 209

Re: Press "next" to get started.

Is it a USB3 hub?
by drgeoff
Thu Aug 16, 2018 6:05 pm
Forum: Troubleshooting
Topic: Static Ip Problem
Replies: 5
Views: 125

Re: Static Ip Problem

SEI wrote:
Thu Aug 16, 2018 2:06 pm
static domain_name=10.10.10.8 10.10.10.4
What is that supposed to do?
by drgeoff
Thu Aug 16, 2018 5:26 pm
Forum: Troubleshooting
Topic: Press "next" to get started.
Replies: 12
Views: 209

Re: Press "next" to get started.

Ah. The literal interpretation of what you wrote is that you hadn't encountered the "Press next ..." before. What you meant is that this is the first time that the keyboard and mouse are not working. Were all the previous successes on non-Zero(W) devices? i've never been convinced that the USB on Ze...
by drgeoff
Thu Aug 16, 2018 4:41 pm
Forum: Advanced users
Topic: Ethernet between 3B+ and multiple Zero W
Replies: 5
Views: 201

Re: Ethernet between 3B+ and multiple Zero W

szapo wrote:
Thu Aug 16, 2018 11:58 am
Sometimes you're just googling for the wrong terms ..
IP over USB is not ethernet.
by drgeoff
Thu Aug 16, 2018 4:28 pm
Forum: Beginners
Topic: !
Replies: 1
Views: 67

Re: Multi video GPI button

Indents are a critical part of python. If you want help with python code, use the code button to preserve the indents when you post.
by drgeoff
Thu Aug 16, 2018 4:21 pm
Forum: General discussion
Topic: Pi 3B+ hdmi audio output or headphone jack to VGA monitor question
Replies: 14
Views: 257

Re: Pi 3B+ hdmi audio output or headphone jack to VGA monitor question

.my intention was to drive my onboard LED monitor speaker somehow "directly" off the Pi boards jacks.....which apparently cannot be done without some sort of either digital to analog conversion(HDMI output) or simply amplification using the TRRS jack. I have never heard of a monitor with onboard sp...
by drgeoff
Wed Aug 15, 2018 11:26 pm
Forum: Networking and servers
Topic: Raspberry pi doesn't connect to internet
Replies: 28
Views: 517

Re: Raspberry pi doesn't connect to internet

When you did the traceroute to www.google.com the DNS returned an IPv4 address.

When you try to ping www.google.com the DNS returns an IPv6 address. Why?

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