Go to advanced search

by Tzarls
Fri Dec 06, 2013 9:55 pm
Forum: Beginners
Topic: Phototransistor and GPIO input
Replies: 10
Views: 9685

Re: Phototransistor and GPIO input

you can "fake" the hysteresis provided by a schmitt-trigger by inverting what you read from the phototransistor and outputting it on another GPIO, then connecting a resistor from that output GPIO to the photodetector input GPIO. Use a value for this resistor that is a large multiple of the pull-up ...
by Tzarls
Fri Dec 06, 2013 7:24 pm
Forum: Beginners
Topic: Phototransistor and GPIO input
Replies: 10
Views: 9685

Re: Phototransistor and GPIO input

Thanks for your answer Ivan. So if I´m getting this right, the schmitt trigger would improve the repeatability (and accuracy?) of the system. I´ll keep this in mind. Now mine was more the "am I probably going to blow my Pi with this circuit?" kind of question... So, even if not 100% reliable (withou...
by Tzarls
Fri Dec 06, 2013 6:10 pm
Forum: Beginners
Topic: Phototransistor and GPIO input
Replies: 10
Views: 9685

Phototransistor and GPIO input

Hi. I need to have the pi detect when a light beam is interrupted. For that I wanted to use a phototransistor. I searched the forum to find how to correctly connect it to the Pi, and found this topic: http://www.raspberrypi.org/phpBB3/viewtopic.php?f=91&t=5806&hilit=GPIO+phototransistor After readin...
by Tzarls
Fri Nov 08, 2013 4:48 pm
Forum: Beginners
Topic: from wifi back to hard line
Replies: 19
Views: 2214

Re: from wifi back to hard line

Well, you can just unplug the wifi adapter...
by Tzarls
Mon Oct 28, 2013 6:58 pm
Forum: Troubleshooting
Topic: Wont boot with case lid on.
Replies: 10
Views: 1633

Re: Wont boot with case lid on.

Also check if the lid is applying some pressure on the SD card.
by Tzarls
Tue Oct 15, 2013 2:45 pm
Forum: Automation, sensing and robotics
Topic: multitasking
Replies: 8
Views: 2764

Re: multitasking

Since you´ll be using USB mics, I´d suggest building an audio engine (the STK with RtAudio might help here) and then analyzing the audio buffers. But then each sample in the buffer would be about 22 micro seconds from the previous/next one (working at 44100 Khz). So you´d need to work at a higher sa...
by Tzarls
Fri Oct 04, 2013 6:38 pm
Forum: Other programming languages
Topic: Brand New Graphical Development System
Replies: 54
Views: 10175

Re: Brand New Graphical Development System

Hey, Nulotachi, I´m wondering.... why is it so difficult to run it under Windows? Anyway, there might be some demand on the audio plugin world for something like this. Google for Synthmaker (now Flowstone) and SynthEdit. Also Reaktor and Max/MSP. People using these languages like the possibility of ...
by Tzarls
Thu Sep 12, 2013 12:28 am
Forum: General discussion
Topic: Your daily head/desk
Replies: 47
Views: 5579

Re: Your daily head/desk

Hey! Show some respect here! The guy´s been around long enough!!!! :lol:

BTW.... hair???? Skin???? Really????!!!!! Do you have some pictures of such a case, or...... :shock:
by Tzarls
Sun Sep 08, 2013 7:48 pm
Forum: General discussion
Topic: Helping to stop scammers
Replies: 14
Views: 2497

Re: Helping to stop scammers

... Also whilst their activities aren't legal, neither is distributing malicious software, two wrongs don't make a right. ... Well, technically he wouldn´t be distributing anything... if you illegally enter his machine and steal something which turned out to be a virus, could you blame him for havi...
by Tzarls
Sun Sep 08, 2013 4:29 pm
Forum: General discussion
Topic: Helping to stop scammers
Replies: 14
Views: 2497

Re: Helping to stop scammers

... Also whilst their activities aren't legal, neither is distributing malicious software, two wrongs don't make a right. ... Well, technically he wouldn´t be distributing anything... if you illegally enter his machine and steal something which turned out to be a virus, could you blame him for havi...
by Tzarls
Sat Sep 07, 2013 9:34 pm
Forum: Gaming
Topic: A new device that is intriguing
Replies: 12
Views: 2296

Re: A new device that is intriguing

I think the idea here is not to think of trying to replace the classic board game experience with some techo-stuff..... but having the oportunity to think of (and implement) alternative ways of doing things, even if those ways may seem a little over the top in some cases. Like the old PC game, "Batt...
by Tzarls
Sat Sep 07, 2013 7:58 pm
Forum: Gaming
Topic: A new device that is intriguing
Replies: 12
Views: 2296

Re: A new device that is intriguing

:idea: D&D type games with a twist....

"The troll attacks you.... you have exactly 5 seconds to roll the dice and get a 6 or you´ll die..... 4.....3.....2.....1...... GAME OVER....."
by Tzarls
Fri Sep 06, 2013 6:06 pm
Forum: General discussion
Topic: Unreliable Unreliable Unreliable
Replies: 81
Views: 12830

Re: Unreliable Unreliable Unreliable

I really think some more information would be useful when reporting SD corruptions.... like: My pi is corrupting SD cards: Revision (1 or 2, maybe even serial number to identify batch) Size, brand and class of SD OS (latest version? yes/no) Overclocked? (maybe even OC settings) Do you shut down pull...
by Tzarls
Thu Sep 05, 2013 6:43 pm
Forum: General discussion
Topic: Unreliable Unreliable Unreliable
Replies: 81
Views: 12830

Re: Unreliable Unreliable Unreliable

I've just spent the last half hour trying to corrupt an SD card in one of mine. Overclocking, pulling the plug during busy times and SD card writes and even part way through the boot up. No go, the SD card is still booting up like nothing happened.... Maybe you Pi is faulty..... :lol: Sorry, couldn...
by Tzarls
Wed Aug 28, 2013 5:18 pm
Forum: General discussion
Topic: Android watch plus a Raspberry Pi, and ideas?
Replies: 5
Views: 1266

Re: Android watch plus a Raspberry Pi, and ideas?

Fun though that might be, once you have added a watch circuit, wifi, bluetooth, 3g internet dongles, phone, display, camera, gps and a small car battery to power this lot I'm not sure i could lift my arm to see the time 8-). Why would you ever need to lift your arm to see the time? Just add a speak...
by Tzarls
Thu Jul 25, 2013 9:24 pm
Forum: Other projects
Topic: PWM Max Frequency?
Replies: 9
Views: 33543

Re: PWM Max Frequency?

Ok, regarding the lowest achievable frequency, I don´t know if this is what you´ve been talking about, BUT... (using wiringPi) gpio mode 1 pwm gpio pwm-ms gpio pwmc 32 gpio pwmr 600000 gpio pwm 1 300000 I don´t have an oscilloscope, only an LED attached to the PWM pin, but I´m pretty sure I´m gettin...
by Tzarls
Mon Jul 22, 2013 5:28 pm
Forum: Automation, sensing and robotics
Topic: Chicken Egg Detector
Replies: 26
Views: 6548

Re: Chicken Egg Detector

Here´s an idea: Have a camera point at the nest from above and take a picture every second or so. Divide the pictures in "areas" (small squares) and look for the general color of each area (you might want to round the color value to some preset values). If your eggs are white, then look for how many...
by Tzarls
Thu Jun 20, 2013 12:06 am
Forum: General discussion
Topic: You and Yours
Replies: 13
Views: 1568

Re: You and Yours

If I remember correctly, when the Pentium II was released, some Intel CEO said (in a PC world-like magazine interview) something along the lines of "if you just do some web browsing and write some e-mails and maybe some word processing, then the original Pentium is enough for you. But if you really ...
by Tzarls
Fri Apr 26, 2013 4:55 pm
Forum: C/C++
Topic: wiringPi- exporting pins from within app + some suggestions
Replies: 0
Views: 852

wiringPi- exporting pins from within app + some suggestions

Hi. First of all, thanks to Gordon for the great wiringPi lib. I´ve just began working on the "inputs" side of my application, using the interrupts feature of the lib, and everything is working as expected. But I have one small question: The library´s documentation for the wiringPiISR(...) function ...
by Tzarls
Tue Feb 26, 2013 4:14 pm
Forum: General discussion
Topic: Pi with bruteFIR
Replies: 8
Views: 6685

Re: Pi with bruteFIR

Well, I´m not saying that the Pi can´t handle the task - I´m just saying that you have to take those considerations into account. Anyway, if you develop something I offer to give it some testing in my own Pi. I´ve got a Behringer USB interface too so I can test in a system very similar to the one yo...
by Tzarls
Tue Feb 26, 2013 2:52 pm
Forum: General discussion
Topic: Pi with bruteFIR
Replies: 8
Views: 6685

Re: Pi with bruteFIR

I see 2 problems with what you want: 1. Latency. According to the information found at bruteFir´s site: "Reasonable low I/O-delay (typically 200 ms)" What will you be using your system for? Realtime audio recording? Mixing? Just watching movies? Depending on that you could know the amount of latency...
by Tzarls
Tue Feb 26, 2013 1:35 pm
Forum: General discussion
Topic: Graphical Programming for the Raspberry Pi
Replies: 3
Views: 676

Re: Graphical Programming for the Raspberry Pi

Not yet. I still have to solve a couple of bugs that have appeared recently and then work on some of the features... from the video you can get that there´s only 1 pin enabled right now. For a decent demo I need to include a "Pin configuration" window, where you can change the direction of each pin ...
by Tzarls
Tue Feb 26, 2013 7:11 am
Forum: General discussion
Topic: Graphical Programming for the Raspberry Pi
Replies: 3
Views: 676

Graphical Programming for the Raspberry Pi

Hi. I´ve been working on a graphical programming system for some time - since even before the Raspberry Pi was launched. I designed it to be totally cross platform, and guess what? It also runs on the RPi! (That makes our app compatible with Windows, Linux <Ubuntu>, Linux<Raspbian> and soon - hopefu...

Go to advanced search