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by [avi]
Fri May 06, 2016 12:46 pm
Forum: General discussion
Topic: How to get Pi replaced under warranty?
Replies: 3
Views: 709

How to get Pi replaced under warranty?

I bought a Pi and I wanted to know how can I get it replaced. Do I need to contact the seller? or Distributor in my country?

Thanks!
by [avi]
Fri Apr 24, 2015 6:20 am
Forum: General discussion
Topic: Any software to manage Arduinos over internet
Replies: 3
Views: 673

Any software to manage Arduinos over internet

Is there any software for Pi which manages all the arduinos connected within the same network? Something like this: - you have a Pi running, which is central hub - all your Arduinos are connected to same network (which Pi is on) - Pi runs a web server and gives a UI - and it lets manage all the ardu...
by [avi]
Mon Apr 13, 2015 1:58 pm
Forum: Off topic discussion
Topic: Interesting little board:CodeBug
Replies: 58
Views: 8933

Re: Interesting little board:CodeBug

It is now successfully funded :D
by [avi]
Sat Apr 04, 2015 2:30 pm
Forum: Automation, sensing and robotics
Topic: Pi Biped Robot walking
Replies: 17
Views: 12685

Re: Pi Biped Robot walking

I was searching for something and landed up on this 2 year old thread.

So...you got any noob level instructions?
by [avi]
Sat Apr 04, 2015 11:56 am
Forum: Off topic discussion
Topic: Interesting little board:CodeBug
Replies: 58
Views: 8933

Re: Interesting little board:CodeBug

^Great, thanks! Backed it on KS for two.
by [avi]
Sat Apr 04, 2015 11:03 am
Forum: Off topic discussion
Topic: Interesting little board:CodeBug
Replies: 58
Views: 8933

Re: Interesting little board:CodeBug

Does anyone have know about age group for this? and also, how it is going to achieve things like: - Scroll your latest tweets from Twitter - Warn when creepers are nearby -- use CodeBug as an extra display for Minecraft - Record results for science experiments e.g. build a temperature data logger - ...
by [avi]
Sat Jul 19, 2014 11:07 am
Forum: General discussion
Topic: Is there any GUI mode for omxplayer?
Replies: 5
Views: 953

Re: Is there any GUI mode for omxplayer?

no, go here: http://www.raspberrypi.org/forums/viewtopic.php?t=40860 Both manuals (Minimal Kiosk Browser and omxplayerGUI) can also be downloaded from there (they are also part of the whole package), if you want to have a look before you install something. Okay! thanks for correcting...let me try ;-)
by [avi]
Sat Jul 19, 2014 10:57 am
Forum: General discussion
Topic: Is there any GUI mode for omxplayer?
Replies: 5
Views: 953

Re: Is there any GUI mode for omxplayer?

gkreidl wrote:You can use my omxplayerGUI. It is installed with Minimal Kiosk Browser, but can also be used standalone.
This one: http://store.raspberrypi.com/projects/omxplayergui ??
Thanks and its free too! Let me try ;-)
by [avi]
Sat Jul 19, 2014 10:52 am
Forum: General discussion
Topic: Is there any GUI mode for omxplayer?
Replies: 5
Views: 953

Is there any GUI mode for omxplayer?

Currently I have to use terminal for media control keys while playing any video via omxplayer. However I am setting up this for a friend and he is not that comfortable with terminal. Is there any way I can enable GUI mode with omxplayer? Or any extra extension/package which gives GUI controls to omx...
by [avi]
Mon Jun 02, 2014 7:00 am
Forum: General discussion
Topic: Isolation between rPi and LCD
Replies: 23
Views: 2751

Re: Isolation between rPi and LCD

FLYFISH TECHNOLOGIES wrote: By taking a look in a drawer, which transistors he/she has there...
ha ha. I have ULN2003 and also couple of BC 547. I will use them
by [avi]
Sun Jun 01, 2014 4:49 pm
Forum: General discussion
Topic: Isolation between rPi and LCD
Replies: 23
Views: 2751

Re: Isolation between rPi and LCD

Hi, how do I find a suitable transistor for this? By googling for another circuit which contains labels ? Best wishes, Ivan Zilic. How does one choses a transistor when connecting between rpi and relay board? I found images with labels and I came across different types of transistors being used: P2...
by [avi]
Sun Jun 01, 2014 4:40 pm
Forum: General discussion
Topic: Isolation between rPi and LCD
Replies: 23
Views: 2751

Re: Isolation between rPi and LCD

What exactly is difference between a breakout board and a buffer board ? I think Buffer board offers more protection? Can logic level converter circuits like this used for protection when I am reading something using GPIO? Found this from wiki I also found a DIY logic expansion board: https://github...
by [avi]
Sun Jun 01, 2014 11:22 am
Forum: General discussion
Topic: Isolation between rPi and LCD
Replies: 23
Views: 2751

Re: Isolation between rPi and LCD

You need to either use a voltage divider, a transistor, a GPIO chip or an opto-isolator. Or my preferred way is to stick a MCP23017 GPIO chip on the I2C bus and use that. If you burn out a MCP23017 that's £2 to replace it versus nearly £40 for a new RPi (including shipping). You can burn out twenty...
by [avi]
Sun Jun 01, 2014 10:59 am
Forum: General discussion
Topic: Isolation between rPi and LCD
Replies: 23
Views: 2751

Re: Isolation between rPi and LCD

DougieLawson wrote:
[avi] wrote:What is the max input current/voltage GPIO on rPi can handle?
16mA @ 3V3
So the component I connected to raspberry pi, say a motion sensor, if it is giving more than 3.3V, it will harm my Pi right? How do I protect in that case? a simple diode?

or a resistor of 206 Ohms ( 3.3/0.016) ?
by [avi]
Sun Jun 01, 2014 10:50 am
Forum: General discussion
Topic: Isolation between rPi and LCD
Replies: 23
Views: 2751

Re: Isolation between rPi and LCD

What is the max input current/voltage GPIO on rPi can handle?
by [avi]
Sat May 31, 2014 6:51 pm
Forum: General discussion
Topic: Isolation between rPi and LCD
Replies: 23
Views: 2751

Re: Isolation between rPi and LCD

btw if I am reading something using GPIO using external device (like a keypad), then what I should be using? A resistor? so that voltage will be less than 3.3v?

or do I have to use some buffer IC?
by [avi]
Sat May 31, 2014 5:59 pm
Forum: General discussion
Topic: Isolation between rPi and LCD
Replies: 23
Views: 2751

Re: Isolation between rPi and LCD

Hi, how do I find a suitable transistor for this? By googling for another circuit which contains labels ? Best wishes, Ivan Zilic. Ha ha, I will do it. But is there any IC which has bunch of transistors on them and I can use it everytime instead of multiple transistors? ... oh wait, let me google t...
by [avi]
Sat May 31, 2014 5:55 pm
Forum: General discussion
Topic: Isolation between rPi and LCD
Replies: 23
Views: 2751

Re: Isolation between rPi and LCD

I found following circuit, which is close to what you are explaining: http://www.openhomeautomation.net/wp-content/uploads/2013/05/Relay_schem_small.png So I connect rPi (GPIO GND) and transistor (emittor) on common ground rPi GPIO out to transistor base and a resistor in between them. And I believe...
by [avi]
Sat May 31, 2014 5:36 pm
Forum: General discussion
Topic: Isolation between rPi and LCD
Replies: 23
Views: 2751

Re: Isolation between rPi and LCD

GPIO outputs don't have short-circuit protection. You could add transistor for each signal line... but be aware that the common transistor you can find around (for example to drive relays) act as inventor, so you can either drive the LCD with inversed signals or add additional transistor to perform...
by [avi]
Sat May 31, 2014 5:28 pm
Forum: General discussion
Topic: Isolation between rPi and LCD
Replies: 23
Views: 2751

Re: Isolation between rPi and LCD

Actually, you can kill most active components if their output is shorted... some components have protection on outputs, but it is not a common practice. These outputs with protection are typically used for "open" connections (communication over several meters, for example). So, how do I isolate ass...
by [avi]
Sat May 31, 2014 5:22 pm
Forum: General discussion
Topic: Isolation between rPi and LCD
Replies: 23
Views: 2751

Re: Isolation between rPi and LCD

Hi, If I am using Nokia 5110 LCD, I think its 3.3v. GPIO inputs can handle 3.3V normally, no additional element(s) needed. Best wishes, Ivan Zilic. so if I am interfacing any device using GPIO and if it uses 3.3V, then no isolation required? any device as in PIR sensor, 16x2 LCD, humidity temperatu...
by [avi]
Sat May 31, 2014 5:17 pm
Forum: General discussion
Topic: Isolation between rPi and LCD
Replies: 23
Views: 2751

Re: Isolation between rPi and LCD

FLYFISH TECHNOLOGIES wrote:Hi,
[avi] wrote:An isolation between rPi and LCD is actually needed?
Depends on details... it's not possible to give you the general answer...
[avi] wrote:Lets say if LCD is faulty and there is short circuit
Short circuit towards which potential (voltage) ?
If I am using Nokia 5110 LCD, I think its 3.3v.
by [avi]
Sat May 31, 2014 5:13 pm
Forum: General discussion
Topic: Isolation between rPi and LCD
Replies: 23
Views: 2751

Isolation between rPi and LCD

An isolation between rPi and LCD is actually needed? Lets say if LCD is faulty and there is short circuit, can that harm my Pi? If so, if I want to create isolation between my Pi and LCD, what I have to use in between? Optocoupler? Transistor? Diode?

Thank you!
by [avi]
Fri May 30, 2014 11:20 am
Forum: Automation, sensing and robotics
Topic: HexPi - my Hexapod Pi Robot build
Replies: 31
Views: 12866

Re: HexPi - my Hexapod Pi Robot build

looks amazing! :o :D

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