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31  Forum 2005-2010 (read only) / Interfacing / Re: servo/ motor problems on: November 13, 2006, 05:37:26 pm
well, i tried the code now with a servo motor, works good, except that the servo is flickering even when the analog value doesnt change. though, it makes some strange noises. tried it with a constant minPulse as well. then included the metro-library, cause i thought the delaymicroseconds might be not precise enough. nothing changed? should i put a capacitor between servo pin and ground? any advice?
32  Forum 2005-2010 (read only) / Interfacing / Re: servo/ motor problems on: November 13, 2006, 06:54:25 am
or check this code (if you are running a servo!), escpecially for arduino:

http://www.tigoe.net/pcomp/code/archives/arduino/000741.shtml
33  Forum 2005-2010 (read only) / News / Re: Arduino mailing lists on: November 15, 2006, 10:58:10 am
i´m neither from netherlands nor from belgium, but actually i´m working in NL. so, if no one is upset by naming it benelux, then you probably name it like that.
34  Forum 2005-2010 (read only) / News / Re: Arduino mailing lists on: November 14, 2006, 05:42:25 pm
i`m not sure if it makes sense for specific towns/regions. lets "merge" them together if there is a demand and people are willing to get in contact.
35  Forum 2005-2010 (read only) / News / Re: Arduino mailing lists on: November 13, 2006, 05:43:58 pm
what about belgium/netherland mailing list? afaik there are also a lot of people using this stuff.
36  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: LED matrix on: January 27, 2007, 03:07:34 pm
wow! it worked out of the box. wired up my 6x6 led matrix and max7219. started arduino board and got a diagonal line smiley . but i´ve encountered another problem! it seems my leds are not being switched off correctly. they lightly dim even when i call max7219_all(0x00).

up to now, i´m using the LED-grid with 1k resistors for each coloumn.

datasheet says sthg like this:
Quote
DIG 0–DIG 7: Eight-Digit Drive Lines that sink current from the display common cathode. The MAX7219 pulls the digit outputs to V+ when turned off. The MAX7221's digit drivers are high-impedance when turned off.

what´s the reason for this kind of "leaking current" ??
37  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Biosensors board on: November 15, 2006, 11:00:46 am
ok. a rather DIY -make way of doing it:

in some crappy one-cent shops you probably find some "lie detectors". they work on the same principle that your skin resistance is measured and assume if you sweat that your skin resistance decrease.
38  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: from 16mhz to 8mhz on: December 29, 2006, 07:27:15 am
please read this thread:
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1163418637/2

you can even use the internal 1mhz oscillator:
http://wolfpaulus.com/journal/embedded/arduino3.html
39  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: arduino hex files burned directly to atmega8 on: November 15, 2006, 12:22:29 pm
noob answer from a noob. the atmega8 (arduino version) has a bootloader in its flash memory which takes up about 1kbyte. after you turn power on (or push the reset button), the bootloader waits few seconds till it starts with its embedded programm. if somehow, the atmel receives some data through RXD (pin 2), it reprograms its flash memory with incoming data. that could be critical if you have some other boards which constantly sends data via TX to your RX. in this case, you should consider to burn your atmega without the bootloader: http://www.arduino.cc/en/Main/Programmer

or this thread: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1158265039/5

of course, you will then need a stk500 or avrISP which resets the chip automatically before passing data to memory.
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