Show Posts
Pages: 1 ... 1477 1478 [1479] 1480 1481 ... 2104
22171  Forum 2005-2010 (read only) / Troubleshooting / Re: Mac crashed when active FTDI/USB serial is removed on: October 22, 2010, 05:27:49 am
Hi, this never happens with me. MacBook pro OS 10.6.4
If the serial monitor window is open then you get a disconnect dialogue box but that's about it. I regularly unplug the USB when making changes to my circuit boards.
22172  Forum 2005-2010 (read only) / Troubleshooting / Re: Arduino Duemilanove 328 plus ENC28J60 = no serial on: June 28, 2010, 06:50:08 am
Was it one of these:-
http://www.nuelectronics.com/estore/index.php?main_page=project_eth
If so I found them to work without disabling the serial connector.
Have you tried just connecting the shield to the arduino and not the Ethernet lead? Does it only disconnect the serial port when the Ethernet lead is connected up?
22173  Forum 2005-2010 (read only) / Troubleshooting / Re: Arduino and wireless on: October 21, 2010, 03:34:31 pm
You need a Wi-Fi shield, however these are expensive and they take up a lot of resource so there is not much room inside for the software you need to write to transfer your data.
22174  Forum 2005-2010 (read only) / Troubleshooting / Re: arduino bt error upload on: October 21, 2010, 08:08:26 am
1) Use the # key when posting
2) Ask a sensible question
3) Check you have selected the correct serial port and board type from the menu.
4) Remember that the code you are trying to down load is irrelevant if it won't download.
22175  Forum 2005-2010 (read only) / Troubleshooting / Re: Arduino Uno, Problem uploading on: October 18, 2010, 10:44:44 am
Quote
when the serial port to upload to is not selected.

That means you have to select the correct port in the Tools -> Serial Port menu of the arduino environment.
22176  Forum 2005-2010 (read only) / Troubleshooting / Re: I think I killed it (solid L LED) on: October 19, 2010, 09:35:23 am
Do you mean the computer doesn't see the USB serial port. If that is the problem then maybe the Atmel chip is OK. The down side is that the USB chip is a lot harder to replace.
22177  Forum 2005-2010 (read only) / Troubleshooting / Re: I think I killed it (solid L LED) on: October 19, 2010, 02:57:54 am
Quote
but the L led remains constant
Is this supposed to do something in your sketch.

Quote
Is this just the Atmel chip that has died? Or is it something else?
In the absence of any information, other than it is broken, it is impossible to say. Does the computer still recognise the serial port. If so it is likely to be just the Atmel chip.
22178  Forum 2005-2010 (read only) / Troubleshooting / Re: Power Regulation on: October 13, 2010, 05:41:16 pm
Quote
The 1000k[ch937] resistor in the schematic is a mistake
Not doing too well on providing error free information. How are we supposed to help if you don't tell us the truth.

So as RC says 10K from base to emitter.
22179  Forum 2005-2010 (read only) / Troubleshooting / Re: Power Regulation on: October 13, 2010, 04:33:30 pm
Do you really use 1000K resistors on the base of the transistors, as that schematic shows. If you do it is way too high, these need to be in the order of 1K to 10K.
22180  Forum 2005-2010 (read only) / Troubleshooting / Re: Power Regulation on: October 13, 2010, 03:45:16 pm
Still not sure what happens to the emitters of the transistors. Are those connected all to the negative end of the battery and the ground of the arduino?
22181  Forum 2005-2010 (read only) / Troubleshooting / Re: Power Regulation on: October 12, 2010, 06:26:10 am
It is difficult to match up that schematic with that photo.
It is not clear what happens to the negative terminals, the schematic suggests you have the diode across the coil, if so where are the negative terminals going?
Or is the circuit doing more than just switching the solenoids?
22182  Forum 2005-2010 (read only) / Troubleshooting / Re: Power Regulation on: September 29, 2010, 04:51:53 pm
Quote
I am trying to post a picture of the circuit.

If your schematic is hard to follow what makes you think a photograph is any easier?
You have clearly done something wrong either in design or execution. If you want the best help we need to see the schematic first to see if it is designed right. Then we need a photo to see if you have implemented the design correctly.
22183  Forum 2005-2010 (read only) / Troubleshooting / Re: Arduino UNO digital/ analog signal reading problem on: October 13, 2010, 07:59:41 am
If you don't connect anything to the board this is the sort of behavioured you would expect.
22184  Forum 2005-2010 (read only) / Troubleshooting / Re: Anyone ever *burned out* an ATmega chip? on: October 11, 2010, 05:58:22 am
Quote
Then I unbridged some traces that looked like it was straight from the +5v reg to a ground.
That in itself would not be an issue.

However there are two ground and two Vcc pins. If you get one of the grounds shorted to the Vcc and the other not, then that could blow things. Also if you fry pins 0 or 1 then it won't download with the boot loader. The easiest way to fry a pin is to connect it to +5V, set it to an output and then write a zero to it.
22185  Forum 2005-2010 (read only) / Troubleshooting / Re: Anyone ever *burned out* an ATmega chip? on: October 11, 2010, 05:48:11 am
Quote
Is it bricked?

I would say so, yes.
Pages: 1 ... 1477 1478 [1479] 1480 1481 ... 2104