Arduino by Davis: “Re: Watchdog ISR question” plus 19 more

Re: Watchdog ISR question
Re: Sonar su RS485
Re: Fragen zu SIDuino
Re: 4 pin sound sensor
Re: Sonar su RS485
Re: NTC keine richtigen Grad Celisus Werte....
Re: Combine codes for RFID
Sonar su RS485
Refreshing an LCD
Re: keypad impazzito
Re: Invio valore variabile tramite I2C a display lcd
Re: one-string piano
Re: Nokia 5110 LCD "dunkelt nach"
Re: MENWIZ: yet another character lcd menu wizard library
Re: NTC keine richtigen Grad Celisus Werte....
Draw precise freehand circles and copy paste drawings with the dePENd table
Re: servo motors battery help
Re: Problemi con gestione dati via seriale tra 2 mega
Re: Cheap chinese motor controller vs sabertooth, should I just get the sabertooth?
bibliothèque Serial qui ne bloque pas loop

Posted: 16 Dec 2012 01:20 AM PST

Quote

If the stack pointed to some non-existant piece of memory...

The stack pointer is exactly sized to SRAM. Assuming the stack pointer wraps when it reaches zero it will always point to a valid SRAM address.

Re: Sonar su RS485

Posted: 16 Dec 2012 01:20 AM PST

Quote from: astrobeed on Today at 04:08:59 AM

Unico accorgimento che devi adottare con il SN75176, e altri IC similari, è che richiede un segnale aggiuntivo per il controllo della direzione dato che la RS485 è half du...

Re: Fragen zu SIDuino

Posted: 16 Dec 2012 01:19 AM PST

Hallo Pete,

ich habe den SID Emulator in einer Arduino Library übersetzt. Somit wäre ein Emulator nur mit einem Arduino Nano möglich.
Du kannst es hier finden:
http://code.google.com/p/sid-arduino-lib/

Re: 4 pin sound sensor

Posted: 16 Dec 2012 01:19 AM PST

Yes, power LED light up. I spin built-in potentiometr, when value from ANALOG IN is above 90 Sensor LED always light up and digital signal is always LOW, when value is under 90 Sensor LED don't light up and digital signal is HIGH.

Re: Sonar su RS485

Posted: 16 Dec 2012 01:17 AM PST

Questo è il data-sheet del sonar. Penso non ci siano problemi ad inserire link di rivenditori.

http://www.robot-italy.com/it/rs485-sonar-with-weatherproof-transducer-temp-compensat.html

A me interessa ricevere solo i dati misurati dal sonar e registrar...

Re: NTC keine richtigen Grad Celisus Werte....

Posted: 16 Dec 2012 12:53 AM PST

Der orginale Spannungsteiler des Beispiels ist 1kOhm Widerstand und ein 4,7kOhm NTC.
Du hast nun enen 47kOhm NTC (zehn mal so groß). damit das Spannungsverhältnic gleich bleibt mußt Du einen 10kIhm widerstand verwenden.
Also 10kOhm Widerstand und 47Ko...

Re: Combine codes for RFID

Posted: 16 Dec 2012 12:53 AM PST

Wow thanks for the detailed reply, tack.
Just to clear things about the #define part, I do think that what you mentioned is true, however, to be on the safe side, I'd like to follow the original program and #define the first, second, third, fourth. Hop...

Sonar su RS485

Posted: 16 Dec 2012 12:51 AM PST

Ciao a tutti, provo nella sezione software, spero di essere più fortunato....

ho acquistato anch'io un sonar rs485pwr ed il trasduttore SN75176BP - Differential Bus Transceiver.
Ora mi sto accingendo a predisporre i collegamenti secondo quanto indicato...

Refreshing an LCD

Posted: 16 Dec 2012 12:50 AM PST

Hi there, I'm posting this within the Programming section to see if I get a better response with assistance in coding a TFT LCD to actively update without leaving any pixels hanging.

I'm using a DHT11 sensor to measure temp/humidity and then have the A...

Re: keypad impazzito

Posted: 16 Dec 2012 12:49 AM PST

lo presa insieme allo stagno su un negozio di elettronica solido corrosivo - cloruro di zinco

Re: Invio valore variabile tramite I2C a display lcd

Posted: 16 Dec 2012 12:19 AM PST

L'ultima versione dell'IDE è la 1.0.3 e la trovi qui --> http://arduino.cc/en/Main/Software
Le librerie ti conviene metterle all'interno la cartella "libraries" che è dentro la cartella "Arduino" che contiene gli sketch.
A seconda del S.O. utilizzato l...

Re: one-string piano

Posted: 16 Dec 2012 12:17 AM PST

Changing where you tap a string only affects the harmonic content of the note it produces in octaves. So there is no real frequency control.
I think your main problem is moving the striking hammer or whatever into place quickly enough.
Good luck with it.

Re: Nokia 5110 LCD "dunkelt nach"

Posted: 16 Dec 2012 12:14 AM PST

Mit Deiner Beschreibung kann ich mir wenig vorstellen. Kannst Du, falls Dir niemand hilfreich antwortet, ein Filmchen davon machen?
Grüße Uwe

Re: MENWIZ: yet another character lcd menu wizard library

Posted: 16 Dec 2012 12:14 AM PST

wow wow... the List is working great here. can you please tell us how can we utilize it?... The main problem i am getting is i am unable to save the variables parameters in EEPROM....
I change the parameters and press CONFIRM, the i go back and press S...

Re: NTC keine richtigen Grad Celisus Werte....

Posted: 16 Dec 2012 12:13 AM PST

Das habe ich schon so verstanden.
Nimm statt des 1kOhm Widerstandes im Spannungsteiler mit den NTC einen 10kOhm.
Grüße Uwe

Draw precise freehand circles and copy paste drawings with the dePENd table

Posted: 16 Dec 2012 12:00 AM PST

We've heard of computer aided design — but here is a system that aids the physical rendering of a design with a pen by using magnets to lock vectors into straight lines and curves into perfect circles,
via DigInfo.tv:

This table helps you to draw precise freehand circles and lines. It is under development by a group in the Yasuaki Kakehi Lab at Keio University.

By using a computer to control the XY position of a magnet under the surface of the table, it implements, on paper, drawing methods utilized in computer graphics.

"I'll place an ordinary ballpoint pen on the table. Now, I can semi-automatically draw a precise circle, or a straight line, or an illustration prepared in advance. In other words, while I draw with the pen, this system lets me switch to accurate rendering like in computer graphics, such as drawing a precise circle, by assisting me with the pen."