Go to advanced search

by davidcoton
Sat Jan 20, 2018 10:33 pm
Forum: Troubleshooting
Topic: STICKY: Analog audio problems? post comments here!
Replies: 126
Views: 61410

Re: STICKY: Analog audio problems? post comments here!

Is it possible to transmit audio output through LAN? I don't have a TV with speakers, Pi's headphone jack output is horrible, and I use a Bluetooth keyboard, so HDMI, Bluetooth and headphone jack are not the way to go. Do you know the way? :mrgreen: Thank you in advance! Try this https://www.raspbe...
by davidcoton
Sat Jan 20, 2018 10:01 pm
Forum: General discussion
Topic: Raspberry Pi3 wont boot a second time
Replies: 4
Views: 97

Re: Raspberry Pi3 wont boot a second time

See The Boot Problems Sticky.

If that doesn't help, try removing the screen, use an HDMI display, and a new , clean image of Raspbian Strretch with Desktop from here copied using Etcher (here). Instructions are here.
by davidcoton
Sat Jan 20, 2018 3:50 pm
Forum: Beginners
Topic: Relay "monitor" on GPIO
Replies: 2
Views: 45

Re: Relay "monitor" on GPIO

The Pi will even provide the necesarry 3V3 supply -- just make sure your wiring practices are: Safe, and compliant with your local standards, on the mains side. Consult an electrician. Designed to avoid picking up noise on the low voltage side. Twisted pair wire, short as possible, route away from m...
by davidcoton
Sat Jan 20, 2018 3:41 pm
Forum: General discussion
Topic: Broadcom BCM2835 Power Saving
Replies: 25
Views: 625

Re: Broadcom BCM2835 Power Saving

bullen wrote:
Sat Jan 20, 2018 3:24 pm
AIUI?
As I Understand It. Google is your friend (or even DuckDuckGo)
bullen wrote:
Sat Jan 20, 2018 3:24 pm
So there is a way to save energy by turning off the GPU altogether?
Yes, it's called the OFF switch :lol:
bullen wrote:
Sat Jan 20, 2018 3:24 pm
But raspbian craps out if you do?
Yes. Not surprising really.
by davidcoton
Sat Jan 20, 2018 2:25 pm
Forum: General discussion
Topic: how to install wine in raspbian wheezy
Replies: 16
Views: 17717

Re: how to install wine in raspbian wheezy

Givo wrote:
Sat Jan 20, 2018 1:22 pm
Hope my 3 months of expertise helped you!
When replying to a three year old post? Unlikely, though it could be useful to others. The wget download may be an error (which I guess will soon get closed), or it may be the free trial version. No idea what the limitations are.
by davidcoton
Sat Jan 20, 2018 10:21 am
Forum: Troubleshooting
Topic: pi touch screen works sorta
Replies: 5
Views: 115

Re: pi touch screen works sorta

Hey! So sorry for not specifying that. I'm using Raspbian Jessie, screen is 3.5" GPIO LCD TFT (http://www.hostingpics.net/viewer.php?id=923396rasp1.jpg) and I don't know the manufacturer since they don't have their name on the screen, however it's the exact same one I linked here. As I said to the ...
by davidcoton
Fri Jan 19, 2018 9:29 pm
Forum: Troubleshooting
Topic: pi touch screen works sorta
Replies: 5
Views: 115

Re: pi touch screen works sorta

i got the waveshare 3.5 inch touchscreen and i installed the custom image and the screen works but it doesnt respond to touch send help xd Ask Waveshare. I doubt anyone here can support their custom image. I'm facing a similiar problem, except my touch screen is from a different manufacture and the...
by davidcoton
Thu Jan 18, 2018 10:50 pm
Forum: Beginners
Topic: HDD partitioning for Raspbian installation.
Replies: 6
Views: 166

Re: HDD partitioning for Raspbian installation.

Whichever way you find, make a backup of your data first. (Surely you make regular backups of anything important anyway?) I do not know of a method to install an OS while keeping an existing data partition, and I would regard any suggested method as risky. Edit: But I do trust procount's knowledge a...
by davidcoton
Thu Jan 18, 2018 9:45 pm
Forum: Troubleshooting
Topic: Can not login
Replies: 3
Views: 88

Re: Can not login

This may be a silly question, but are you sure the password is pi?

What OS are you using? If Raspbian, the default account is pi but the password is raspberry. Unless you changed it, it will still be raspberry.
If not Raspbian, all my bets are off.
by davidcoton
Thu Jan 18, 2018 5:44 pm
Forum: General discussion
Topic: Best Small Cheap Way To Power A Pi
Replies: 11
Views: 340

Re: Best Cheap Lipo Batteries For Pi

I would not recommend cheap LiPos under any circumstances.
by davidcoton
Thu Jan 18, 2018 5:43 pm
Forum: General discussion
Topic: RPi2B right for me?
Replies: 6
Views: 213

Re: RPi2B right for me?

If you can sort the OS issue, the Pi2B does not have onboard Bluetooth. For that use a Pi3B. It also runs faster by default. It should have enough power to do video and voice recognition -- there are four processotr cores.
by davidcoton
Thu Jan 18, 2018 4:47 pm
Forum: General discussion
Topic: RPi 3 going portable - suitable battery
Replies: 7
Views: 226

Re: RPi 3 going portable - suitable battery

First thing you need to do is measure the actual current consumption of your hardware while it's doing what you want it to do when on battery. Convert that to power in watts (multiply by 5V). Multiply by the run time to give energy in Watt-hours. Convert that to ampere-hours at the battery voltage (...
by davidcoton
Thu Jan 18, 2018 4:33 pm
Forum: General discussion
Topic: Whoops! - Two Power Sources
Replies: 8
Views: 240

Re: Whoops! - Two Power Sources

PeterO wrote:This is just appliaction of owm's law.
I'm not sure I know that one. Is it the derivation of Ohm's law that applies when it hurts? :lol:
by davidcoton
Wed Jan 17, 2018 11:03 pm
Forum: Beginners
Topic: GPIO input from external power source
Replies: 6
Views: 159

Re: GPIO input from external power source

What has your "trusted source" of 3.2V got to do with the 3V signal from the alarm panel? As already recommended, use an opto-isolator. It will save you (and your Pi) from a world of pain. It will also help protect you and your property in the event of serious problems to either side of the interfac...
by davidcoton
Wed Jan 17, 2018 10:47 pm
Forum: Beginners
Topic: Internal pull up/down function explanation
Replies: 16
Views: 405

Re: Internal pull up/down function explanation

You cannot use internal pulls on an output. You can configure internal pulls regardless of whether the pads are set as input, output, or alternate function. The pulls stay in circuit even when they are competing with the output drivers, though obviously they make next to no difference in that case....
by davidcoton
Wed Jan 17, 2018 10:31 pm
Forum: General discussion
Topic: Most efficient way to power the Zero board from LiPoly?
Replies: 10
Views: 344

Re: Most efficient way to power the Zero board from LiPoly?

Another option would be to use a DC DC down convertor and connect it to the 3.3v rail. Which one of these would be better? There is a very good 5V to 3V3 LDO regulator already on board. It will function with inputs as low as 3V5. There is probably no gain in adding your own, and you risk damage wit...
by davidcoton
Tue Jan 16, 2018 10:35 pm
Forum: General discussion
Topic: Failing USB hard drive
Replies: 40
Views: 914

Re: Failing USB hard drive

Heater wrote:
Tue Jan 16, 2018 9:30 pm
I have to say, I'm amazed.

"Later", I would not be wasting any time in this situation...
I'm not surprised that @Heater does not approve of freezing drives :lol:
by davidcoton
Mon Jan 15, 2018 9:59 pm
Forum: Beginners
Topic: upgrade stretch error
Replies: 4
Views: 150

Re: upgrade stretch error

viewtopic.php?f=28&t=202523
Read the whole topic before doing anything.
by davidcoton
Mon Jan 15, 2018 9:42 pm
Forum: Troubleshooting
Topic: NEED HELP! COMBINING ULTRASONIC SENSOR AND LED DIODE
Replies: 7
Views: 171

Re: NEED HELP! COMBINING ULTRASONIC SENSOR AND LED DIODE

School assignment?

How far have you got? Is the problem hardware or software?
HARDWARE: Upload a picture of you setup to a hosting site and link here. Post a schematic.
SOFTWARE: Post your code so far and explain in more detail what is not working.
by davidcoton
Mon Jan 15, 2018 9:34 pm
Forum: General discussion
Topic: How to change 32 bit packages to default architecture on a raspberry pi 3
Replies: 25
Views: 858

Re: How to change 32 bit packages to default architecture on a raspberry pi 3

Luigi3711 wrote:
Mon Jan 15, 2018 9:32 pm
I am still having the same problem. It has something to do with a java plugin and armhf.
You had more than one problem. The above should have solved one of them. Sorry I can't help with the rest.
by davidcoton
Mon Jan 15, 2018 9:32 pm
Forum: General discussion
Topic: Failing USB hard drive
Replies: 40
Views: 914

Re: Failing USB hard drive

I think I've only done it once. I think I tapped from the circumference towards the axis, as the casing looked strongest that way. I may have mis-remembered. My plan may be theoretically flawed. That's why I put it in the "Last Resort, nothing to lose" category.
by davidcoton
Mon Jan 15, 2018 9:28 pm
Forum: Beginners
Topic: Internal pull up/down function explanation
Replies: 16
Views: 405

Re: Internal pull up/down function explanation

Another way to look at the pull up / down is to consider the output in a default state. When a pull up is used there is a 1 'felt' at the output when the input is not being used and when the pull down is used there is a 0 'felt at the output when the input is not being used. If 'something' is conne...
by davidcoton
Mon Jan 15, 2018 9:11 pm
Forum: General discussion
Topic: Failing USB hard drive
Replies: 40
Views: 914

Re: Failing USB hard drive

The other possible temporary fix when there is nothing to lose is a sharp tap with the handle of a medium sized screwdriver. Sometimes it can unstick things.
Note my use of the word temporary.
by davidcoton
Mon Jan 15, 2018 4:50 pm
Forum: Beginners
Topic: Internal pull up/down function explanation
Replies: 16
Views: 405

Re: Internal pull up/down function explanation

so if we look at the 2 circuits they are the same its just that the 10K pull down resistor is internal on the pi ( actually 50K on pi) Umfortunately, that is not quite true. You can implement an EXTERNAL pull-down like that, but the INTERNAL 50K pull-down is, well, internal -- on the other side of ...

Go to advanced search