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by scrishton
Thu Apr 26, 2018 1:46 pm
Forum: Advanced users
Topic: Rotated screen and / or mouse - help please.
Replies: 0
Views: 163

Rotated screen and / or mouse - help please.

I am working on a project written using Python and Pygame which uses a screen rotated to Portrait format. Using display_rotate=2 in the config.txt successfully rotates the display and the mouse, but seems to slow down display updates and cause an annoying diagonal line across the screen whenever I s...
by scrishton
Sat Apr 01, 2017 8:27 pm
Forum: Other projects
Topic: Portable ADS-B low flying aircraft alarm
Replies: 0
Views: 348

Portable ADS-B low flying aircraft alarm

I have a Pi in my loft receiving ADS-B aircraft signals and sending them to the Planefinder website. All works very well. Most of the transmissions have location data, but some aircraft, including military ones, only give their altitude. I have recently started flying a drone. I am very careful to o...
by scrishton
Tue Feb 21, 2017 2:40 pm
Forum: Python
Topic: pygame restart after tvservice -o
Replies: 1
Views: 507

Re: pygame restart after tvservice -o

Did you ever find an answer for this one John?
by scrishton
Wed Dec 18, 2013 12:24 am
Forum: Graphics, sound and multimedia
Topic: Generating SMPTE timecode on the 3.5mm jack
Replies: 7
Views: 6558

Re: Generating SMPTE timecode on the 3.5mm jack

Thankyou Vadim! I knew I was missing something obvious somewhere. I do want to be able to override the time sometimes - it's useful to be able to over write tapes with timecode later than anything you're going to record that day so if you play beyond the end of your recordings it knows which way to ...
by scrishton
Tue Dec 17, 2013 11:50 pm
Forum: Graphics, sound and multimedia
Topic: Generating SMPTE timecode on the 3.5mm jack
Replies: 7
Views: 6558

Generating SMPTE timecode on the 3.5mm jack

As part of my next crazy project on the Pi I'm trying to generate time of day linear timecode in order to jam a real timecode generator. I have written a Python function which runs in the background as a daemon thread. It gets the time from time.time, converts it to local hours, minutes, seconds and...
by scrishton
Mon Dec 09, 2013 1:16 pm
Forum: Troubleshooting
Topic: USB redux
Replies: 514
Views: 200982

Re: USB redux

dom wrote:
thradtke wrote:Would you mind recommending one or two that comply to the current USB driver?
http://www.raspberrypi.org/archives/4803
But it's only four port. How about a seven port hub?
by scrishton
Mon Dec 09, 2013 9:42 am
Forum: Troubleshooting
Topic: USB redux
Replies: 514
Views: 200982

Re: USB redux

If you already have the latest firmware (which has a lot of USB fixes), then probably buying a a decent hub? Would you mind recommending one or two that comply to the current USB driver? Yes please, let us all know what hub will work. I have bought and tried quite a few and none of them work entire...
by scrishton
Fri Dec 06, 2013 7:40 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Multiple USB > Serial adaptors
Replies: 31
Views: 20324

Re: Multiple USB > Serial adaptors

Hi Max, Yes, it's very much alive, and recording 'The Voice' at Media City this evening. It is currently written in Python, though I may re write it in C some time. If you search for Sony 9 pin protocol you can find most of the info you need online. Controlling a single machine is fairly straightfor...
by scrishton
Fri Dec 06, 2013 11:25 am
Forum: Troubleshooting
Topic: USB/serial converters (not very) broken on Pi
Replies: 162
Views: 109570

Re: USB/serial converters (not very) broken on Pi

i'm also looking to get a stable DMX master running. currently trying via an ftdi usb serial interface i had already laying around. but i'm getting sporadic freezes. watchdog could be one workaround but the reboots eventually could corrupt the sd card, so not really a solution... has anybody come u...
by scrishton
Fri Sep 06, 2013 9:04 am
Forum: Automation, sensing and robotics
Topic: Raspberry Pi as a cable tester
Replies: 3
Views: 4551

Re: Raspberry Pi as a cable tester

Many years ago I was tasked with testing a load of installed 9-way d connector cables. I made up a connector with resistors to each pin - pin 1 was the common, pin 2 connected through 220ohm, pin 3 330ohm and so on. Then I could plug that in at one end and check the resistances with a multimeter at ...
by scrishton
Fri Sep 06, 2013 8:35 am
Forum: Automation, sensing and robotics
Topic: Raspberry Pee
Replies: 3
Views: 1730

Re: Raspberry Pee

And here's the control panel.... http://simon.rishton.tv/wp-content/uploads/2013/09/20130906-091517.jpg No, really. It's all in a table in a php script, background texture, switches and warning lamp downloaded from th' interweb, dymo labels generated by http://acme.com/labelmaker/labelmaker.cgi The ...
by scrishton
Thu Sep 05, 2013 12:07 pm
Forum: Other projects
Topic: Where's my Pi?
Replies: 14
Views: 3858

Re: Where's my Pi?

Without an Internet connection the whole thing is pointless in this case. The purpose of the device is to display information scraped from the Internet in a tidy easy to read form. Though in the long term having an accurate clock would be useful for, perhaps, generating timecode from the audio jack.
by scrishton
Thu Sep 05, 2013 11:24 am
Forum: Other projects
Topic: Where's my Pi?
Replies: 14
Views: 3858

Re: Where's my Pi?

GPS would seem to be the easiest solution, yes. But the windscreen is at the far end of the vehicle from the Pi. There are no windows at my end, we like to work in the dark. I'm trying to make the Pi as self contained as possible with just a USB lead for power (there's always a USB socket somewhere ...
by scrishton
Thu Sep 05, 2013 10:37 am
Forum: Other projects
Topic: Where's my Pi?
Replies: 14
Views: 3858

Re: Where's my Pi?

Good sleuthing. Yes, I know where they are booked to be in advance, but sometimes plans are changed at short notice. The test system seemed to work fine by looking up the external IP address, but since I put it in a scanner last week nobody has updated the password on the adsl modem and it still thi...
by scrishton
Thu Sep 05, 2013 7:49 am
Forum: Other projects
Topic: Where's my Pi?
Replies: 14
Views: 3858

Re: Where's my Pi?

Perhaps something along the lines of pinging servers in different cities then triangulating location from latency?
by scrishton
Thu Sep 05, 2013 7:37 am
Forum: Other projects
Topic: Where's my Pi?
Replies: 14
Views: 3858

Re: Where's my Pi?

Different days, different crew, different smartphones. But I suppose if I checked who's phones were on the wifi I could narrow down which region the unit was in.
by scrishton
Thu Sep 05, 2013 6:05 am
Forum: Other projects
Topic: Where's my Pi?
Replies: 14
Views: 3858

Re: Where's my Pi?

The power is off while the vehicle is moving...
by scrishton
Wed Sep 04, 2013 10:11 pm
Forum: Other projects
Topic: Where's my Pi?
Replies: 14
Views: 3858

Re: Where's my Pi?

GPS doesn't work well inside vehicles. And is expensive.
by scrishton
Wed Sep 04, 2013 9:49 pm
Forum: Other projects
Topic: Where's my Pi?
Replies: 14
Views: 3858

Where's my Pi?

I have a project which involves leaving Raspberry Pis on outside broadcast vehicles to display data from th' interweb. In order to pick the right data to display they need to know where they are. There is a limited number of places they could be, which can be narrowed down by looking online at which...
by scrishton
Wed Sep 04, 2013 8:24 pm
Forum: Automation, sensing and robotics
Topic: Raspberry Pee
Replies: 3
Views: 1730

Raspberry Pee

My 'better half' wanted a water feature in the garden. I often work long hours far from home, and for the last hour or so of my journey home there's nowhere for a 'comfort break'. So the idea of getting out of the car right next to running water while fumbling for the house keys presented a bit of a...
by scrishton
Fri May 10, 2013 8:57 am
Forum: Camera board
Topic: Grayscale option
Replies: 18
Views: 6384

Re: Grayscale option

--colfx 128:128 should result in a monochrome image. from https://github.com/raspberrypi/userland/blob/master/host_applications/linux/apps/raspicam/RaspiCamDocs.odt looking good... ~:" I assume there is a similar trick to save only the blue channel? That would be useful for me. Remember that all th...
by scrishton
Fri May 03, 2013 7:44 am
Forum: Troubleshooting
Topic: USB redux
Replies: 514
Views: 200982

Re: USB redux

Hi Gordon, Disabling microframe scheduling works fine, but then I run out of interrupts when I add another HID device (Contour ShuttleXpress wheel). And on updates from 24th March and later (Rebuild with: dwc_otg: implement tasklet for returning URBs to usbcore HCD layer) it stops working again, eve...
by scrishton
Thu May 02, 2013 10:08 pm
Forum: Troubleshooting
Topic: USB redux
Replies: 514
Views: 200982

Re: USB redux

Hi Gordon, Sorry to pester, and no pressure, but any idea how soon? I'm starting to think that my USB / keyboard / rs422 problem is actually related to the 'curses' getch command being upset by the microframe scheduler enable. I was trying to find time to try reading key presses a different way, but...
by scrishton
Mon Apr 29, 2013 1:37 pm
Forum: Troubleshooting
Topic: USB redux
Replies: 514
Views: 200982

Re: USB redux

Perhaps there should be a separate forum section for USB problems. And another one for slagging each other off - but perhaps if our moderator jamesh could moderate himself a bit more and stop winding people up we wouldn't need the second one.

Simon R.
by scrishton
Wed Mar 27, 2013 3:43 pm
Forum: Troubleshooting
Topic: USB redux
Replies: 514
Views: 200982

Re: USB redux

Hi Gordon. Which bits does it break? I'm trying to get keyboard, ContourShuttleXpress device and FTDI RS422 adapters to play well together, and have had them working together sometimes on a Model A. Latest few updates from rpi-update have broken it though, such that the keyboard stops responding. I ...

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