Show Posts
Pages: 1 ... 11 12 [13] 14 15
181  Forum 2005-2010 (read only) / Interfacing / Re: Ardurino with Visual Basic ? Possible or Not? on: September 14, 2009, 04:36:06 pm
Good to hear. There seems to be differences on pcs.

Here it worked if I connected Arduino when Visual studio was running. Put if I shatdown the pc or if I put the computer to stand by, Arduino stopped working.
182  Forum 2005-2010 (read only) / Interfacing / Re: Ardurino with Visual Basic ? Possible or Not? Yes on: September 14, 2009, 02:01:39 pm
Yes it is possible. But look out for RESET-EN.

When you start Windows or Visual basic there is glicth on DTR pin from Windows. It is connected to Reset-en and puts Arduino in wrong state.

First I made a program with Arduino ide. And put that into Arduino. Then I cut reset-en jumper. Then you can work with visual basic without problems with Arduino. But remember, before a new program can be loaded into Arduino, that jumper must be fixed.
183  Forum 2005-2010 (read only) / Interfacing / Re: How to start USB bus in Arduino board on: April 19, 2009, 12:09:03 pm
I think we can use this board.

There could be some more io but you can't get everything.

For curious:
A friend of mine is going to write some pc programs reading and writing usb com port.  And my job is to handle some hw devices with usb/serial data.

Thanks
184  Forum 2005-2010 (read only) / Interfacing / Re: How to start USB bus in Arduino board on: April 19, 2009, 05:53:18 am
Sorry my delayed reply, other work to be done first.

I think I begin to understand. So, what goes to serial io goes to usb also. The schematic seems to say so.

One more basic question, if the power is cut off, does our program stay in the board.
185  Forum 2005-2010 (read only) / Interfacing / Re: How to start USB bus in Arduino board on: April 17, 2009, 12:12:15 pm
Hi, and thanks for answering.

What I understood is that serial to usb chip shows like a somekind of virtual serial bus in a pc. Nothing more fancy.

But that would be enough for us. In pc we write to a virtual com port and it comes out of Arduino. Is that all what is needed.

I have not actually used the card yet, but I understand, code is also downloaded to the Arduino via usb, don't code and our data get mixed up.
186  Forum 2005-2010 (read only) / Interfacing / How to start USB bus in Arduino board on: April 17, 2009, 10:48:21 am
We are trying to read input pins and send them to usb bus. And read from usb to outputs.

But how to start usb bus. That is when we use serial bus, how to get that into usb. All I see is serial buses.

What code do I need in Arduino?
Do I have to switch some hardware plugs?
187  Forum 2005-2010 (read only) / Troubleshooting / Re: Mouse dual phototransistors on: April 21, 2009, 10:50:10 am
I once checked mouses, and I think optosensor went directly to a chip. I was 0---5V levels.

Your mouse may be different but you may light leaking, like others have said. But are you sure your voltages are right way. It could be low voltage when there is light and high when there is no light. But check leaked light.

188  Forum 2005-2010 (read only) / Development / Not using EAGLE but PADS on: September 17, 2010, 01:40:50 pm
I would like to use Mentor PADS instead of EAGLE. But PADS has no idea of EAGLE files.

Is there someone who has converted those CAD files to other formats.

DXF?

Other ideas?

Thanks
Leif
189  Forum 2005-2010 (read only) / Bugs & Suggestions / Re: total current drain on: August 30, 2010, 02:13:55 pm
If you have two boards, like you seem to have. You can check your cpu, if you take a cpu from a dead board and put it into a working board. If your regulator is bad, your new board will work with the old cpu.

At least on my Duemilanove board have a socket under the cpu.
190  Forum 2005-2010 (read only) / Interfacing / Re: How many Ethernet shields in a network on: July 26, 2010, 05:39:19 pm
OK

I found some data for SI-40138. It seems to have transformers included. Only a sw person would call a transformer magnetics, but I have seen this term also.

So it seems there is wrong info in the link I gave. If some one has more or first hand info, I am happy to hear.
191  Forum 2005-2010 (read only) / Interfacing / Re: How many Ethernet shields in a network on: July 26, 2010, 05:15:20 pm
Quote
If you take a closer look at most ethernet device you have, something clearly stands out, due to its size:  the transformers. The arduino ethernet shield uses a non-isolated approach: a resistor divider. This is very unusual actually, see W5100 datasheet for an example. This might lead to electrical problems because it forces non-isolation, and might kill your controller or switch.
This thread.
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1275156413

Edit: This thread is from
 TCP/IP without Ethernet Shield: any use for it ?
29.05.2010 at 20:06:53

Edit2: I am of course very happy if E shields hw is a very standard design, with transformers / magnetics. Are sure of this.
192  Forum 2005-2010 (read only) / Interfacing / How many Ethernet shields in a network on: July 26, 2010, 03:59:44 pm
If MACs and IP addresses are all different.

I read somewhere that there is no ethernet transformer on Ethernet Shield, could this cause problems.
193  Forum 2005-2010 (read only) / Interfacing / Re: Hacking a remote control - no physical switches? on: June 16, 2010, 07:33:05 am
Small reed relays or similar could also handle that. The problem often is, where to find a good place to solder.

With relays you don't need to know about voltages on the remote. Choose relays well, because signals are small and not enough to go through thick oxide layer on contacts.
194  Forum 2005-2010 (read only) / Interfacing / Re: How is PIN code given in GSM shield on: May 28, 2010, 12:07:49 pm
I'm just talking to myself.

I added
   ret_val = gsm.SendATCmdWaitResp("AT+CPIN=PINC", 1000, 100, "", 1);

into Void setup block. There is plenty things to check, like how to disable sim code and how to know when it is needed.

195  Forum 2005-2010 (read only) / Interfacing / How is PIN code given in GSM shield on: May 28, 2010, 10:47:49 am
Hi

I am starting a new GSM shield + Arduino project. My new Prepaid GSM account has a PIN code, but PIN codes are not mentioned in the code examples.
Pages: 1 ... 11 12 [13] 14 15