Raspberry Pi Forums

Bellisarius

For a Seismograph project, and other projects, I would really like to have a strip chart control. I'm not really bothered what language it's implemented in, as I want to box it up so it can just receive telegrams with new values from the kids code. Although there are many strip chart controls for SD...

Bellisarius

It is possible that the phone is drawing current from the USB port and this is overloading your PI supply leading to dropouts that cause flash corruption.

Do you have a little rainbow square in the corner of the screen?

Bellisarius

I don't think it's a software issue as it does reach the shutdown point. PSU and reset cct's in the RPI are poor, the problem may be electrical. What is that little message that flashes in the middle of the monitor just before it goes down?

Bellisarius

BTW, if you do get it working, make a snapshot of your SD card

Bellisarius

Next command I would run is

sudo apt-get check

Bellisarius

It does if you stick it back in the PC to try rewriting it......

Bellisarius

As Firefox requires X windows, your best option could be to set the Pi up for auto login to the X desktop (default on current Raspian distros), and then launch it from the window manager configuration file: ~/.config/lxsession/LXDE/autostart (You may need to create it) Just add the program name to t...

Bellisarius

I would expect the Kernel to get beyond the rainbow even if the SD card was ready only. You do mean a fullscreen rainbow and not just a little rainbow in the corner? If it does not get beyond that screen then the RPI is not able to boot from the SD card. How did you format and prepare the card? Why ...

Bellisarius

I've been trying out various Python development environments on Raspbian, and I've found IEP to be head and shoulders above the alternatives. It's not particularly fast, but on the latest Pi's it's quite usable. Given the important role Python has in the RPI ecosphere, I couldn't help wondering whet...

Bellisarius

Thanks, I wasn't aware that a new CM was on the way; I guess I should also take into account the spec of that as well....is it available anywhere?

Bellisarius

I'm no expert on this, but in the second example who is actually shifting the data from the mmc to memory?

Bellisarius

What about trying to print other attributes of $conn before calling query?

Bellisarius

Use trained homing-pigeon/parrot crossbreeds to memorise and deliver the data. A speech-to-text engine will be able to convert the data back to enable it to be posted on your django. RFC 1149 describes a far more efficient way of using Avian carriers, and it has been successfully implemented and te...

Bellisarius

sfe2me wrote:I have a temperature sensor I want to send the data to an html file in a django project

First thing to is to tell people where the django project is being hosted. On the same Pi, on another computer on the local network, or on a remote webserver.

Bellisarius

You can add USB sound adapaters for as many outputs as you want.

Pi has a stereo output on the board, but hdmi monitors often have audio outputs which come form the hdmi channel. I'm not sure if the mixer allows concurrent use of both outputs on the Pi.

Bellisarius

First thing to remeber about touchscreens is they are fiddly, so you will want to keep pots and buttons. Touch screen is good for doing screens of modes or hotkeys put not for altering values. I do industrial control panels and put numeric keypads along side the touchscreens for numeric input. When ...

Bellisarius

[quote="asandford"]Been answered many times already. I'm sorry, I've spent 2 hours reading about supply and availability and the situation is clear, but what is not clear whether this will eventually become a regular product distributed by RS Farnell etc, or whether it's only intended to b...

Bellisarius

The compute module is designed to be embedded onto another board, but the Pi Zero can also be easily mounted onto another board and from my viewpoint has a number of advantages. One great feature of the Pi is you make copies of known working SD card snapshots and just slot them in and out, which is ...

Bellisarius

Ah. OK. I was under the impression that you thought it was missing from yours and not from others. I love to tinker as much as the next man, but I'd have sent it back under warranty as it's brand new if it were mine, rather than voiding the warranty by solder bits to it. Each to their own. Good luc...

Bellisarius

In that case, every single close-up photograph found via Google Images clearly showing R40 to be missing on the B+ must be of non-functioning boards then, so I defer to your wisdom. I know they don't normally have them, I've got other Pi B+'s myself. I was curious, and seeing as how it's supposed t...

Bellisarius

That's because it's not meant to be there. The datasheet is quite categoric, Test3 is only for factory testing and MUST be tied to VDD33IO for normal operation. This is what linking R40 does. Have you followed any of the advice given so far? I haven't actually been given much advice. As I noted in ...

Bellisarius

I have now established that we are missing the enable signal from the LAN9514 If I wire this up by hand the USB is enabled, but not working. Clearly there is something wrong in the LSI. I noticed that R40 was missing. Without this TEST3 pin is not pulled up to the adjacent VDD33IO, which it should b...

Bellisarius

Mind you, I could always hack the SD card in another Pi to give me the status of the LSI on the video without login....if the info is available.

Bellisarius

That makes it a bit clearer...but it looks like there's no way to tell between a fault condition and the device being forced off by the LSI unless we cut a track.

It's not that there's any sware indication in the boot mesg if there's that fault condition?

Bellisarius

The enable to U13 is low

Search found 37 matches

Strip Chart

Re: sd card corrupts/is unable to boot RPi often

Re: raspberry pi will not reboot

Re: I can't use apt-get cause I've have held broken package

Re: I can't use apt-get cause I've have held broken package

Re: Stuck on rainbow screen, sd card has become write-protec

Re: Auto Start Firefox-Esr on Boot

Re: Stuck on rainbow screen, sd card has become write-protec

IEP - Python editor

Re: Zero Vs Compute module

Re: Booting non-linux kernels

Re: php and mysql failing

Re: sending data from raspberry

Re: sending data from raspberry

Re: 2 speakers

Re: Controller with a touchscreen

Re: Zero Vs Compute module

Zero Vs Compute module

Re: Pi B+ USB PSU cct

Re: Pi B+ USB PSU cct

Re: Pi B+ USB PSU cct

Re: Pi B+ USB PSU cct

Re: Pi B+ USB PSU cct

Re: Pi B+ USB PSU cct

Re: Pi B+ USB PSU cct