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1  Community / Exhibition / Gallery / Re: Engine start button with fingerprint and remote webasto control. on: January 26, 2013, 09:17:03 am
Wow that's nice work!
I guess it took a lot of time to figure out how to interface the central locking and the webasto heater.
How did you do that?
2  International / Deutsch / Re: [Einsteiger] Nur von Luft und Liebe.. äh Licht on: January 10, 2013, 05:57:53 pm
Zumindest die Innen- und Aussentemperatur solltest du messen, damit im Winter das Fenster nicht dauerhaft offen steht.

Entweder schließt du das Fenster zeitgesteuert mit einer RTC (= Real Time Clock) oder besorgst dir einen Air Quality Sensor.
Ich weiß allerdings nicht genau ob man mit einem Air Quality Sensor erkennen kann ob die Luft sich für uns "stickig" anfühlt.
Die Dinger kosten aber kein Vermögen, ich würds mal testen.

Die von sth77 angesprochenen Fensterantriebe sollten die Fenster eigentlich recht "sicher" schließen.
Ich würde den Fenstergriff einfach gegen einen mit Schloss austauschen und ihn in der Kipp-position Verriegeln, dann sollte keiner Einbrechen können. (Außer er hat nen dicken Stein dabei.  smiley-mr-green)

Ich denke mal deine Stehlampe hat nur einen Stecker? Dann geht auch nur eine Funk-Steckdose... außer du fummelst an den Kabeln in der Stehlampe rum, dann wären wir aber wieder bei den Versicherungs-Problemen.

Bei der Deckenlampe wirst du wohl nicht drum rumkommen in dessen Stromkreis einzugreifen. (=ein Relay dazwischen zu hängen)

Eines meiner ersten Projekte war es einn "Arduino-Lichtschalter" zu bauen.
Was draus geworden ist siehst du hier.

3  International / Deutsch / Re: Flackern an PIN 13 on: January 06, 2013, 02:37:57 pm
Das flackern an PIN 13 ist normal wenn du das board per USB anschließt.
Das einzige was du tun kannst ist ein anderen Pin zu verwenden.
4  Using Arduino / Project Guidance / Re: First Project with the Arduino - Sous Vide - Dimmer / Heater on: December 25, 2012, 06:35:08 am
Quote
So how does a PWM output work with a SSR? Is it chopping up the AC like per cycle or just turning it on and off so many times per second?
I get a little confused when it comes to AC cycles.
PWM is useless with 60Hz mains voltage if you don't know where the zero-volt-point in your cycle is.
You have to pulse exactly after this point, or you would just end up with a flickering light (or uneffective heater).
5  Using Arduino / Microcontrollers / Re: Leonardo as ISP for ATtiny85 on: December 10, 2012, 04:47:07 pm
I'm using a 10uF capacitor.

As you said, maybe a bigger one would help?

I tried with 3 more capacitors (in paralell), but it also doesn't work.

Strange: When i choose Leonardo and upload something, even with the 4 capacitors, the upload succeeds!


6  Using Arduino / Microcontrollers / Re: Leonardo as ISP for ATtiny85 on: December 10, 2012, 04:25:47 pm
Hello,

i tried that shift-thing, didn't show anything.
Then i enabled the "verbose output" while uploading, and that's the result:

Code:
C:\+ARDUINO\ArduinoIDE-1.0.1\hardware/tools/avr/bin/avrdude -CC:\+ARDUINO\ArduinoIDE-1.0.1\hardware/tools/avr/etc/avrdude.conf -v -v -v -v -pattiny84 -cstk500v1 -P\\.\COM4 -b19200 -e -Uefuse:w:0xff:m -Uhfuse:w:0xdf:m -Ulfuse:w:0x62:m

avrdude: Version 5.11, compiled on Sep  2 2011 at 19:38:36
         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
         Copyright (c) 2007-2009 Joerg Wunsch

         System wide configuration file is "C:\+ARDUINO\ArduinoIDE-1.0.1\hardware/tools/avr/etc/avrdude.conf"

         Using Port                    : \\.\COM4
         Using Programmer              : stk500v1
         Overriding Baud Rate          : 19200
avrdude: Send: 0 [30]   [20]
avrdude: Send: 0 [30]   [20]
avrdude: Send: 0 [30]   [20]
avrdude: Recv:
avrdude: stk500_getsync(): not in sync: resp=0x00

avrdude done.  Thank you.

The Attiny is probably not the problem, i tried both Attiny85 and Attiny84.

Is it possible that the Leonardo doesn't work for this stuff because of it's internal USB controller?
7  Using Arduino / Project Guidance / Re: Auto opening door for chicken coop on: December 09, 2012, 04:02:35 pm
This Video could also be useful for you:


... and a Video about the whole system:
8  International / Deutsch / Re: Zubehör und Bauteile in Bonn on: December 09, 2012, 02:22:53 pm
Also wenn ich was brauche wie einen Schalter oder Temperatursensoren,
dann guck ich bei Conrad.de nach dem Teil, schau obs in meiner Filale verfügbar ist und hols ab ;-)
Schneller gehts eigentlich nicht.

Arduino-Spezifische Teile wie Shields bestell ich immer online, sowas führt Conrad leider nicht.
9  International / Deutsch / Re: Entprellen der Taster vor Prozessoreingang on: December 09, 2012, 02:21:20 pm
Hier ist eine Möglichkeit für die "Hardware-Entprellung":

http://www.ganssle.com/debouncing-pt2.htm
10  Using Arduino / Project Guidance / Re: Geocaching Project on: December 09, 2012, 02:18:48 pm
I probably would use a mechanical tilt-switch.
The device could be build to remain in sleep mode (power saving!) until someone picks it up and the tilt-switch triggers an interrupt to wake it up.
11  Using Arduino / Microcontrollers / Re: Leonardo as ISP for ATtiny85 on: December 09, 2012, 12:06:11 pm
Hi,

no, i don't have Atmel Studio installed.

What else could cause my problem?
12  Using Arduino / Microcontrollers / Leonardo as ISP for ATtiny85 on: December 09, 2012, 09:53:24 am
Hello,

I want to upload sketches to an Attiny85 using my Leonardo as ISP.

I followed the (updated) instructions from the MIT. (Using IDE 1.0.1)

So, i uploaded the "Arduino as ISP" Sketch and selected the right board (Attiny85) and Programmer (Arduino as ISP) in the IDE's menu.

Next step is to burn the bootloader, but this error is occuring for me:
Quote
avrdude: stk500_getsync(): not in sync: resp=0x00
(I don't have this problem uploading sketches to the Leonardo.)

I checked the wiring a couple times, so i assume it's some kind of software problem.

I just don't get whats the problem.

Can anyone help me?
13  Using Arduino / Installation & Troubleshooting / Programming Pro Mini with Leonardo? on: November 23, 2012, 03:10:20 pm
Hello,

i got a Pro Mini running as an "intelligent" light switch in my house.

Unfortunately a button in this project started to bounce more than usual and so i want to update my code.

For the inital programming i connected the Pro Mini with an Arduino Uno and had to remove the Atmega chip from the board.

Now i only have a Leonardo, so i can't remove any Atmega chip. (it's SMD)

So the question here is: How can i upload code to a Pro Mini with a Leonardo?


14  International / Deutsch / Re: Ir problem on: November 07, 2012, 05:52:32 pm
Ich gehe mal stark davon aus, dass du A) die Library nicht richtig eingebunden hast oder B) du die alte Version benutzt.

Hier kannst du die neue Version runterladen.
15  Using Arduino / Sensors / DHT22 - negative celsius temperatures on: October 28, 2012, 08:59:35 am
Hi,

i got a DHT22 in my weather station.

As tempatures are slowly going below freezing point (0 degrees celsius) at night here in germany, i discovered a problem with the sensor's Arduino Class.

When the temperature drops below 0°C (for exampe -1°C) the Class gives me exactly 0°C at all times.
I figured out the class got an update regarding to this issue 4 month ago, so i updated the class and re-uploaded my sketch to the board.

Now, when the temperature drops below 0°C, i get something like 3275.3°C from the class. (but everythink ok with positive temperatures)
As the variable inside the class is working with integers, i remembered the maximum integer value is 32767.
So real my temperature is probalby  32767 (max int. value) - 32753 (value the class gives me) = 14 = 1.4  = the real -1.4°C

It seems to me something causes the integer value to overflow, but i don't know how to solve this...

Ok, as i'm sending the measured values every 10 minutes to a webserver, i could just calculate the real negative temperature,
but that didn't solve the problem on the roots.

Any suggestions?
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