viernes, 18 de enero de 2013

Arduino by Davis: “Radio-4-Matic #piday #raspberrypi @Raspberry_Pi” plus 19 more

Arduino by Davis: “Radio-4-Matic #piday #raspberrypi @Raspberry_Pi” plus 19 more

Link to Arduino by Davis

Radio-4-Matic #piday #raspberrypi @Raspberry_Pi

Posted: 18 Jan 2013 02:00 AM PST

Radio-4-Matic

Here's a little bit of time-travel magic to help Adam Foster experience a little live radio magic. And as he reported to us when he shared the project: "I used various Adafruit components and materials in its construction, so technically I *suppose* it's an Adafruit!"

Something one encounters in these western United States of America is the lack of BBC Radio 4. Or rather, the lack of proper live Radio Four, the excellent iPlayer Radio providing invaluable on-demand capability. "But Adam," I hear you cry, "you can already listen to live BBC radio over the internet! Why can't you use that?"

Timezones. It's live radio, but all the timing is wrong. Namely, the written-in-stone Radio 4 schedule must not, under any circumstances, be allowed to become misaligned from the rising and the setting of the sun. How could anything (or anyone) remotely British even think of operating normally if the Friday evening comedy gets broadcast on Friday morning, or if the Book at Bedtime arrives early in the evening? Or heaven forbid, if Woman's Hour escapes from its usual 10am ghetto?
So, short of removing both the North American continent and the Atlantic Ocean in order to make Seattle a suburb of Plymouth, we're going to have to take the existing internet radio streaming and add a timezone-busting delay. Oh, and then wrap the whole thing in a suitably middle-class casing complete with a Royal warrant of appointment. Luckily, we moved west of the Prime meridian, so we can get away without using actual time travel.

Cue the Radio-4-Matic.

Read more.

Radio4

998Each Friday is PiDay here at Adafruit, be sure to check out our posts, tutorials and new Raspberry Pi related products. Have you tried the new "Adafruit Raspberry Pi Educational Linux Distro" ? It's our tweaked distribution for teaching electronics using the Raspberry Pi. But wait, there's more! Try our new Raspberry Pi WebIDE! The easiest way to learn programming on a Raspberry Pi.

We now have Raspberry Pi Model B with 512MB RAM in stock and shipping now!

Re: 2-dimensional array of longs and memory issues

Posted: 18 Jan 2013 01:48 AM PST

There seems to be a fair amount of this:
Code:
  for(int i = 1; i < 6; i++) {

Any reason for not using index zero?


Not really... it's kind of a long story. I ha...

Re: Not able to get graphic LCD to work with Uno

Posted: 18 Jan 2013 01:48 AM PST

No its just the LCD. I am following the connections as given in the playground page here http://playground.arduino.cc/Code/GLCDks0108, if you look down the page there is a table, I am following the panel B column.

The code is as included in the library...

Strange RGB LED problem

Posted: 18 Jan 2013 01:47 AM PST

I'm guessing the more experienced ones will be able to answer this in a heartbeat.

I have bought this set of common cathode RGB LEDs: http://www.ebay.com/itm/321029238303?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

Despite what the ad says they ...

Re: Power arduino with an external battery!!!

Posted: 18 Jan 2013 01:46 AM PST

I am using arduino uno. It has a port named as "Power". At that port there are pins available for 5v and GNG. So you can connect those pins to your external battery. I have tried it and it works fine.
Regards

Analisi impulsi contatto a tapparella per antifurti

Posted: 18 Jan 2013 01:44 AM PST

salve, sto provando Arduino per la prima volta
e vorrei capire come fare per attivare un output
a seguito dell'analisi di un'input, che mi legge il contatto NC
che si apre e si chiude in tempi che si misurano col millesimo di secondo,
insomma, di un co...

Re: 125khz rfid Reader - Problem

Posted: 18 Jan 2013 01:33 AM PST

Ich habe mir mal dein Beispiel angeschaut. Soweit ich das verstanden habe, soll dort ein String und ein char Element mit einander ver...

Re: Alimentare arduino con una batteria ricaricabile!!!

Posted: 18 Jan 2013 01:31 AM PST

Sì é potenzialmente possible. A che tipo di accumulatore hai pensato?
Ciao Uwe

Re: reading the serial port

Posted: 18 Jan 2013 01:30 AM PST

We're not supposed to do people's homework either.

I don't mind helping someone learn as long as they do learn. Otherwise it's unpaid work since yes I consider a person who has really learned makes my world a bit better.

Tyguy: serial data you get from...

Re: Amplificare segnale <1v

Posted: 18 Jan 2013 01:30 AM PST

lo schema é errato.

Grazie uwe

Sono stato ore a capire se ero io o lui ad aver disegn...

Re: Pervasive Displays [no power displays - e-paper]

Posted: 18 Jan 2013 01:30 AM PST

Does anyone have the datasheets for directly driving the EPD's Display, controller? specification including commands, SPI timing specification and what not.

Non...

Raspberry Pi Google Talk Robot #piday #raspberrypi @Raspberry_Pi

Posted: 18 Jan 2013 01:00 AM PST

Great project to setup your Pi as a Google Talk bot like your handy IRC channel-bots of old (am I dating myself here?). Check status of GPIO pins etc and send commands — takes your Pi one (very small) step closer to resembling Daniel Suarez's Daemon.

From Mitch Tech:

Google Talk/Chat/Messenger is normally used by humans to interact with other humans. However, its underlying technology can also be used as a mechanism to implement software robots.  Internet bots, also known as web robots, WWW robots or simply 'bots' can also utilize the technology to perform automated functions over the web.  There are many such bots in existence, offering a diverse spectrum of services from jokes (jokes@askme.im) to URL Shortening using bit.ly (url@askme.im), even mathematical calculation (math@bot.im).  Using such bots is quick and easy to configure, all that must be done is to add the bot as a contact to your messaging account.  Then, whenever you desire data from the service, simply text the command to the bot and it will respond with the respective message.

The RasPi Bot is essentially the same as any other automated Internet robot.  To configure it, it must first have its own e-mail address associated with a Google talk account.  This e-mail address must also be added as a contact with the account that wishes to communicate to the bot.  Then, whenever the script is running on the remote machine, it will log into Google chat and appear as a friend in your contact list.
The software itself is essentially just a Python daemon script that is a wrapper around the XMPP protocol.  When executed, the script will sign in to Google talk using its own username and password.  The Python script is derived from the open source project pygtalkrobot: An open source python gtalk(google talk) bot framework using XMPPPY and PyDNS libraries, that also references the source code of python-jabberbot.

Read more.

What radio transceiver best meets these requirements?

Posted: 18 Jan 2013 12:53 AM PST

Hi All...

I am working on a device that floats around in the water and transmits data to a fixed receiver.

The device must be battery powered, so low power. The radio is point to point because there are no other transceivers available for a mesh. This...

Re: Reset Interrupt possible?

Posted: 18 Jan 2013 12:52 AM PST

You don't need it unless you feel a need to waste cycles, flash and ram.

Unsigned math is like a clock. From 11 to 1 is 2 hours without having to add or subtract 12.
That's what you should see in the sketch I posted above, but you have to look. How lon...

Re: reading the serial port

Posted: 18 Jan 2013 12:47 AM PST

Quote
, like to feel that the person receiving help will somehow meet me half way
Amen.

Re: Arduino controlled Amplifier - I need ideas!

Posted: 18 Jan 2013 12:47 AM PST

Great! I will check out the MCP4131! But for volume control, should I buy the 10K version or the 100K version?
I've also been looking at the ds1802, but with shipping to norway, that's about 26$, which is way too much for a single IC

Re: Serial Servo Control

Posted: 18 Jan 2013 12:46 AM PST

Quote
I was hoping it would be as simple as an "else if" line with a 'no serial' comand then a 'servo write' comand!
No, I'm afraid it isn't that simple.
Serial is really slow, so the "no serial" condition is pretty much most of the time, as s...

Re: détection du son + analyse

Posted: 18 Jan 2013 12:28 AM PST

Il a également la possibilité de faire un filtre audio hardware

Re: Serial Servo Control

Posted: 18 Jan 2013 12:27 AM PST

Thanks for your quick replies! Please see code below which has been ripped from another thread on this forum.

[code]#include <Servo.h>

int moveServo;

Servo servo1;
Servo servo2;
Servo servo3;
Servo servo4; // name servos


void setup()
{
 
  servo1.atta...

Re: Balance GSM

Posted: 18 Jan 2013 12:26 AM PST

Attention, est-ce que tu as la balance déjà ? Car le premier lien que tu donnais en effet se servait du hack d'une balance qui utilisait un pont de wheastone, ce qui n'est le cas de toute et il sera peut-être plus simple de repiquer une sortie analogiq...
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