Show Posts
Pages: [1] 2 3 ... 7
1  Using Arduino / Project Guidance / Use FHT library with Gemma on: August 18, 2014, 11:51:27 pm
Hello everybody

I'm very beginner in Gemma and i'm interested in whether i can use FHT http://wiki.openmusiclabs.com/wiki/ArduinoFHT library with Gemma without any problem?

Thanks in advance!
2  Using Arduino / General Electronics / Re: use 50+ LEDs and arduino on: August 10, 2014, 01:58:21 pm
Ok, i know that there are no resistors included, so i'll get BC547 and connect 5 LEDs in parallel and one resistor in series. this would work, i think
3  Using Arduino / General Electronics / Re: use 50+ LEDs and arduino on: August 10, 2014, 09:11:44 am


if i use this kind of schematic and control 10 transistors using arduino to power up 50 leds, Does this would be normal ? I'm also interested in whether 12 volt 2A power supply is enough for arduino plus LEDs?
4  Using Arduino / General Electronics / Re: use 50+ LEDs and arduino on: August 10, 2014, 08:15:42 am
http://www.ebay.com/itm/50-x-Pre-wired-5mm-Bright-Cool-White-LEDs-Bulb-20cm-Prewired-12V-LED-Lamp-Light-/351139788445?pt=LH_DefaultDomain_0&hash=item51c18ff69d

These are leds
5  Using Arduino / General Electronics / Re: use 50+ LEDs and arduino on: August 10, 2014, 05:51:17 am
I want to arrange them in series if I use multiple transistors, 10 LEDs in series for each transistor. Is it OK? And I have same questions as above.
6  Using Arduino / General Electronics / use 50+ LEDs and arduino on: August 10, 2014, 04:39:52 am
Hello

I want to control 50+ LEDs, not individually but only using some sort of transistor(s) to make LEDs on at specific time and then make them off.

I'm interested in electronics: What kind of wall adapter i'd need to have enough supply for LEDs (assuming that each one consumes 20 ma). Also what kind of schematic is better, use 1 transistor which handles higher current or just little ones with lower current ?

And all this transistors must be driven using arduino. Project is very easy but i don't want to burn LEDs, or make something wrong.
7  Using Arduino / General Electronics / Re: VS1053 board SD card problem on: July 28, 2014, 02:37:31 pm
http://www.martin-gardner.co.uk/how-to-connect-your-old-sd-card-to-an-arduino/

and what about this source ? does this really work for me ?.
and in addition, will current sufficient for it, since no additional parts are listed in the article, above.

Added later:

Ok, i've got one tutorial (also), which i think is the best one http://sriramiyer.net/blog/2013/09/28/arduino-making-a-microsd-shield/

I think this would solve my problem.

and i'm interested in can it cause any problem with VS1053 shield, since it will have separate SD card slot. i've been working on VC1053 and it had onboard SD card slot (had no problem using it), but i'm not sure if it work?

also do you have any library targeting this board (VS1053 ? )
8  Using Arduino / General Electronics / VS1053 board SD card problem on: July 28, 2014, 12:00:15 pm
Hello everybody

I've purchased board like this http://www.ebay.com/itm/310645105092?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649from ebay and as i found out later it has no SD card shield so i'm interested in if i can connect SD card directly to arduino because it is the best choice for me for this time, since i'm in a hurry and another purchase would waste my valueable time.

So please help me and give me some info how to connect SD and this board to arduino and make them work.

Thanks in advance!
9  Using Arduino / Programming Questions / Re: Music shield v2 on: May 24, 2014, 09:44:07 am
And if I choose another board is this possible?
10  Using Arduino / Programming Questions / Re: Music shield v2 on: May 24, 2014, 08:30:54 am
ok, situation is as follows.

i know that song X.mp3 should be started from 0:30sec, so i'd like to start playing music from 0.30sec, and not start from 0.00sec as default.

i think that i have badly written my problem description.
11  Using Arduino / Programming Questions / Music shield v2 on: May 24, 2014, 02:26:32 am
Hello
I'm interested in whether can I play music from a given time with music shield 2 and arduino. And if I can, how, just tell me function from the library which takes time argument to start playing from that time, or some other source to manage do like above.

this is shield
http://www.seeedstudio.com/depot/Music-Shield-V20-p-1372.html?cPath=38
12  Using Arduino / Audio / Re: audio shield plus motion sensor on: May 22, 2014, 05:09:39 am
Any ideas ?
I've been looking and saw VS1053 chip, bit I m not sure if it supports pause/resume feature and if it can play music from given time?
13  Using Arduino / Audio / audio shield plus motion sensor on: May 21, 2014, 02:36:34 pm
Hello everybody,

I've started a project which works depending on PIR sensor. When motion is detected arduino should play some pretty recorded was or mp3 file, located on SD card. I want shield which would be able to play some sound, pause it, meanwhile play another if necessary, and continue from the paused position. This actions are highly depended on PIR sensor.

I don't know exactly which sound shield would be capable of making such things.

Thank you in advance!
14  Using Arduino / Audio / Re: arduino FHT on: April 11, 2014, 12:47:42 am
Thanks, and I'm also interested when I read 3 ADC will it have influence on sampling rate , I.e. 9,5 / 3 or just 9,5?
15  Using Arduino / Audio / Re: arduino FHT on: April 10, 2014, 10:03:46 am
OK, thank you for your response.
I'm interested in how to minimize 20khz reading freq to 2 or 3, and sampling rate also. I think that when I put delays between reading values it will only cause value update rate and not freq, or sampling rate.
Pages: [1] 2 3 ... 7