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1  Using Arduino / LEDs and Multiplexing / Re: PWM rgb ledstrip on: September 28, 2012, 06:21:07 am
This is basically what my schema looks like:



This is (of course) without the RF receiver. Which has a gnd, 5v and a data pin.

The npn I took of a rgb controller like this one:



Two of them say: d3002, 0604, MO235F
The other one says: mdd1653
2  Using Arduino / LEDs and Multiplexing / Re: PWM rgb ledstrip on: September 27, 2012, 02:56:14 am
Do you have power transistors for each color?

Flickering almost certainly leads to dirty power/ground issues.

Yes I do have power transistors. If it would be a dirty power/ground issue, shouldn't it be flickering disregarding the pwm duty cycle?

How so?  I built several RF controlled modules last year with RGB LED strings.  My setup consisted of two strings containing 20 RGB LEDs each, driven by WS2801s (one per RGB LED).  I used bit banging to control the strips.  I used an nRF24L01+ RF module which uses SPI to communicate with the ┬ÁC.  Didn't use VirtualWire.

One module acted as a master, sending RF signals to the others, telling them how to change.
Even so, the flickering shouldn't occur anyway rights? Using pins 3,5 and 6?
3  Using Arduino / LEDs and Multiplexing / Re: PWM rgb ledstrip on: September 26, 2012, 08:11:30 am
Yes it is continuous. I've bought a 12v/5A power supply. This should be plenty right? If I turn the leds to 100% (analogWrite(x, 255)), the strip is not flickering. Only if I turn it down to ~25% it's very noticeable. Could this still be a power related issue?
4  Using Arduino / LEDs and Multiplexing / PWM rgb ledstrip on: September 26, 2012, 03:32:26 am
Hello,

I'm having some issues with PWM-ing a rgb ledstrip.

I've bought the following ledstrip: http://www.ladyada.net/products/rgbledstrip/ (3 meters/30 leds p/m => 90 rgb leds => 270 leds)

I'd like to make my own RGB-led controller using RF to turn it on/off/change colors. This means I have to use VirtualWire. This takes up my timer1. So I only have 4 pwm pins left. I've tried some combinations, but somehow this always results in flickering leds when I turn them down to ~25%.

I've thought of buying the tlc5940. But if I'm correct, the library for the tlc5940 uses timer1 and timer2. So I can't use virtualwire in combination with tlc5940?
Now I've ordered https://www.sparkfun.com/products/10444, but I'm not sure if this will solve my issue.

Can someone enlighten me on what my problem is here? Is it because I use 2 different timers to PWM the ledstrip? Or is it possibly the powersupply? Will the WS2801 solve my issue?
5  Forum 2005-2010 (read only) / Interfacing / Arduino Ethershield SD on: August 24, 2010, 01:59:43 pm
Hi, I bought the Arduino Ethershield SD. But I can't get the SD card part to work. I've downloaded the SdFat library and ran the SdFatInfo Example. But all I'm getting is:

error: card.init failed
SD error: 1,0

I've tried 2 different sd cards, but none seem to be working.

Is there something I'm doing wrong?

Any help is appreciated!
6  Forum 2005-2010 (read only) / Interfacing / Re: Nuelectronics Ethershield not working? on: January 18, 2010, 10:53:53 am
I can't ping, but the settings are ok.
7  Forum 2005-2010 (read only) / Interfacing / Re: Nuelectronics Ethershield not working? on: January 18, 2010, 10:31:48 am
Tried both libraries to no avail smiley-sad
8  Forum 2005-2010 (read only) / Interfacing / Re: Nuelectronics Ethershield not working? on: November 17, 2009, 10:54:05 am
Using Windows 7, though I have also tried with Windows XP
9  Forum 2005-2010 (read only) / Interfacing / Re: Nuelectronics Ethershield not working? on: November 17, 2009, 10:14:27 am
I've tried the default (192.168.1.15)

(192.168.1.0/24 is an ip prefix)
10  Forum 2005-2010 (read only) / Interfacing / Re: Nuelectronics Ethershield not working? on: November 17, 2009, 09:16:50 am
Thanks for your reply.

The subnetmask is indeed 255.255.255.0 (using 192.168.1.0/24).

I will try some more cables, the only thing I can think of what might be wrong. Though it sucks that mails don't get answered.

Not enough information available for this shield smiley-sad
11  Forum 2005-2010 (read only) / Interfacing / Re: Nuelectronics Ethershield not working? on: November 15, 2009, 09:04:19 am
bump

I think I'm missing something, but I feel like I've tried everything. I just don't get a response from the shield. Nuelectronics isn't answering my mails, so I'm totally lost now.
Just wondering if someone could help me out here....  :-/
12  Forum 2005-2010 (read only) / Interfacing / Re: Nuelectronics Ethershield not working? on: November 06, 2009, 02:23:32 pm
I'm not using the mega, I'm using the diecimila. And yes I've checked the ip and mac address.
13  Forum 2005-2010 (read only) / Interfacing / Nuelectronics Ethershield not working? on: November 05, 2009, 08:12:36 am
Ok, so I've tried everything to get the ethershield working, but I can't seem to get any response from the shield. The lights are blinking, so data is being received by the shield but I don't see any data comming back. I've tried a direct connection (pc->ethernet shield) and also through a switch, and a router but nothing seems to be working.
I even tried a new shield but that one seems to have the same problem, which makes me think I am doing something wrong. I've tried all the examples (webserver, webclient, ping etc) but to no avail.
Also I've tried the shield with a different arduino board but again.. that didn't work either.

Is there anyone with the same problem? Or could anyone help me to get the shield working?
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