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by jasonl
Tue Mar 03, 2015 10:36 pm
Forum: Camera board
Topic: 8mm film telecine project using picamera
Replies: 29
Views: 22384

Re: 8mm film telecine project using picamera

This looks really cool. Have been looking for all sorts of ways to digitize my Super8 films. And already having a Pi, camera, Arduino + some of the cables - that is a good start. But ordering the PCB looked a bit difficult. Have been on the http://smart-prototyping.com/PCB-Prototyping.html site. Bu...
by jasonl
Sat Feb 21, 2015 5:06 pm
Forum: Camera board
Topic: 8mm film telecine project using picamera
Replies: 29
Views: 22384

Re: 8mm film telecine project using picamera

Fantastic project, one thing I am missing which I thik is me being dim :? , but why do you need 2 servo motors and 2 stepper motors? I would have thought the stepper motors would have been enough to pull the film through on a frame by frame basis. Thanks! I've neglected this project somewhat - but ...
by jasonl
Sat Sep 27, 2014 6:29 pm
Forum: Camera board
Topic: 8mm film telecine project using picamera
Replies: 29
Views: 22384

Re: 8mm film telecine project using picamera

[ Quite a long time ago. I'm trying too numerize argentic films but it is 9.5mm ones. I use the original projector with a 1.2W LED and a picam. The focus is ajusted roughly to the image. A motor makes the advance on the "mechanic's" for each image. I use bash and raspistill to do the job. On BW : r...
by jasonl
Thu Jun 26, 2014 6:28 pm
Forum: Camera board
Topic: 8mm film telecine project using picamera
Replies: 29
Views: 22384

Re: 8mm film telecine project using picamera

Wow - this looks really useful! A lot of it's over my head as I'm just naively using python-picamera - but I'm sure they'll get added to the API in due course. :-) Are the analog/digital gains relevant in stills mode? Or are they just another representation of ISO? For my project dialling back any g...
by jasonl
Wed Jun 25, 2014 10:16 pm
Forum: Camera board
Topic: 8mm film telecine project using picamera
Replies: 29
Views: 22384

Re: 8mm film telecine project using picamera

Hi Dave, Thanks for your comments. I'll experiment and pare down the fixed exposure settings. It'd be nice to kill the preview as the extra time freed up could allow additional captures to be made or processing to be done on the Pi. My pre-Pi telecine project took two exposures of each frame - one o...
by jasonl
Wed Jun 25, 2014 9:06 pm
Forum: Camera board
Topic: 8mm film telecine project using picamera
Replies: 29
Views: 22384

Re: 8mm film telecine project using picamera

Thanks for the info! It'll be interesting to see if the MMAL_PARAMETER_CAMERA_BURST_CAPTURE parameter can be made available in the picamera library. It'll probably be useful in other circumstances like timelapse photography or scientific imaging. Being able to access the current shutter and awb woul...
by jasonl
Wed Jun 25, 2014 7:23 pm
Forum: Camera board
Topic: 8mm film telecine project using picamera
Replies: 29
Views: 22384

Re: 8mm film telecine project using picamera

Thanks for the comments. Sorry for the delay in replying. I'm quite pleased with the results so far, and hope to improve the code and tweak the hardware and optics. As regards getting a consistent exposure for the capture, the camera is basically set to a fixed ISO, the auto white balance switched o...
by jasonl
Sun Jun 15, 2014 11:44 am
Forum: Camera board
Topic: 8mm film telecine project using picamera
Replies: 29
Views: 22384

8mm film telecine project using picamera

I'd like to present my Raspberry Pi based 8mm film telecine project. It uses the Pi and camera, some Makerbeam extrusion, a couple of stepper motors, a couple of hacked servos, LED lighting and some 3d printed parts to handle the film. Glued together using some electronics and Python code. Pulled to...
by jasonl
Sat Sep 10, 2011 9:19 am
Forum: General discussion
Topic: Camera for R-Pi
Replies: 36
Views: 9067

Re: Camera for R-Pi

<r>Quote from jamesh on September 9, 2011, 15:08<br/> I can give you some generic camera related answers, but nothing specific.<br/> <br/> USB is simply not fast enough for larger resolution cameras (30fps at 1080P)- so a special interface is needed - usually CSI2 (although lower resolution cameras ...
by jasonl
Thu Sep 08, 2011 9:20 pm
Forum: Off topic discussion
Topic: Raspberry-Pi compared with Sheevaplug
Replies: 12
Views: 12587

Re: Raspberry-Pi compared with Sheevaplug

<r>Quote from jamesh on September 8, 2011, 09:25<br/> Well, if anyone has a Sheeva plug, can they run the linpack bench mark on it? We have results for the Arm11 on the Raspi so it would be interesting to compare. I couldn't find any results using Google.<br/> <br/> <br/> This is from my (original m...
by jasonl
Mon Sep 05, 2011 12:13 am
Forum: General discussion
Topic: Floating point performance?
Replies: 50
Views: 17030

Re: Floating point performance?

<r>Or would it be OK just to supply the relevant GCC switches for certain critical packages?<br/> For the linpack benchmark above would not compiling it with the line: gcc -mfloat-abi=hard -O3 work? Or would glibc and all the other support libraries need recompiling, too?<br/> Ref:<br/> <URL url="ht...
by jasonl
Sun Sep 04, 2011 10:22 pm
Forum: General discussion
Topic: Floating point performance?
Replies: 50
Views: 17030

Re: Floating point performance?

<r>Just for giggles I ran the linpackc benchmark on my Sheevaplug running Debian Squeeze - which is running an Arm v5 with no floating point hardware:<br/> <br/> Enter array size (q to quit) [200]:<br/> Memory required: 315K.<br/> <br/> LINPACK benchmark, Double precision.<br/> Machine precision: 15...
by jasonl
Thu Sep 01, 2011 12:29 am
Forum: Off topic discussion
Topic: Raspberry-Pi compared with Sheevaplug
Replies: 12
Views: 12587

Re: Raspberry-Pi compared with Sheevaplug

<r>Thanks for the reply - I wasn't really making value judgements saying one was superior than the other. Just that there are similarities. I'm sure a lot of Raspberr(y/ie)s will end up in server roles like the current plug computers.<br/> <br/> Quote from Svartalf on August 31, 2011, 14:30<br/> <br...
by jasonl
Wed Aug 31, 2011 11:29 pm
Forum: General discussion
Topic: Children programming the Raspberry Pi
Replies: 20
Views: 6114

Re: Children programming the Raspberry Pi

<t>SD cards are cheap - there's no reason why a simple guide or book about programming the Raspberry Pi shouldn't come with a custom distribution matching the text. The setup part will be - plug in supplied SD card, plug in Raspberry. Wait 30 seconds, type 'ipython' or what-have-you. Exercise 1........
by jasonl
Wed Aug 31, 2011 11:14 pm
Forum: General discussion
Topic: Welcome Pack
Replies: 14
Views: 4020

Re: Welcome Pack

<t>As I see it the Welcome Pack would be a separate product to the Raspberry Pi itself. Similar to the way some Arduino introductory kits are marketed. You can buy them with or without the board. They're a kit of stuff to do learn about the hardware and do some fun stuff. I think a £20 welcome pack ...
by jasonl
Wed Aug 31, 2011 10:46 am
Forum: General discussion
Topic: Welcome Pack
Replies: 14
Views: 4020

Re: Welcome Pack

<t>There's been a fair bit of comparison of the R-Pi with the microcomputers of the 80s, and for it as a catalyst for teaching about computers.<br/> Recalling the high quality manuals for the BBC micro and Sinclair machines, I think it might be a good idea to provide a 'Welcome pack' to flesh out th...
by jasonl
Tue Aug 30, 2011 4:43 pm
Forum: General discussion
Topic: How would you use a Raspberry Pi device?
Replies: 514
Views: 222420

Re: How would you use a Raspberry Pi device?

<r>I've liberated an old Apple M0116 keyboard from the attic. It's pretty solid with quality ALPS keyswitches. I intend on renovating it and converting it to USB using a Teensy or some other AVR. There's a lot of space left in the keyboard, so it'll be good to put a Raspberry-Pi in there to create a...
by jasonl
Tue Aug 30, 2011 3:25 pm
Forum: Off topic discussion
Topic: Raspberry-Pi compared with Sheevaplug
Replies: 12
Views: 12587

Re: Raspberry-Pi compared with Sheevaplug

<r>Hi, I've got a Sheevaplug. It's running a few server processes, and it's a small ARM test-rig for trying out a few things. It's running Debian Squeeze armel version off an 8GB SD card, with a USB hard drive for media storage. It's been running pretty well, for the last 18 months or so more-or-les...
by jasonl
Tue Aug 30, 2011 2:48 pm
Forum: General discussion
Topic: Stellarium
Replies: 39
Views: 16589

Re: Stellarium

<t>Wow - it looks promising. Just had a look at the Stellarium FAQ page and it says they have had success with older PCs including Pentium III 800Mhz, 128MB RAM on XP, AMD K6 400 Mhz, 256MB RAM, Mac PPC's back to about 667MHz - "graphics card capable of rendering OpenGL. A Riva TNT2, released in 199...
by jasonl
Tue Aug 30, 2011 10:22 am
Forum: General discussion
Topic: Stellarium
Replies: 39
Views: 16589

Re: Stellarium

<r>Hi, I have a Sheevaplug set up with Debian Squeeze on it and just tried an "apt-get install stellarium". It worked, and the program works sort of. I have to run it over the network with X forwarded via SSH - so the FPS is around 0.02s - not so good.<br/> The Sheeva doesn't have an Floating Point ...
by jasonl
Tue Aug 30, 2011 10:13 am
Forum: General discussion
Topic: STICKY: Introduce yourself!
Replies: 3706
Views: 205210

Re: Introduce yourself!

<t>Hi all,<br/> <br/> I'm from the UK and like many others here got into computers at school in the 1980s. Our comprehensive school held a fête to fund the equipping of a room with a dozen BBC Model B's networked via Econet to an Research Machines server - just in time for our year to take O-level c...

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