So I have a gizDuino ATMEGA 644(an arduino clone), yesterday it is working very well and even uploaded some codes into it. But today my computer suddenly don't recognize the port where my microcontroller is connected, I'm sure that i installed the driver and even tried to use several USB ports and cable but it doesn't recognize it. I'm really confused because it does power-up when it is connected to my computer but it really don't recognize the port.Does someone experienced my situation?What seems to be my problem? How did you solve the problem? pls help


closed as off-topic by Joe Hass, Passerby, Stephen Collings, Matt Young, Dave Tweed Jan 29 '14 at 13:36

This question appears to be off-topic. The users who voted to close gave this specific reason:

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Try the obvious ones first:

  • Try on another computer.
  • Look in Device Manager (if running Windows) to see if an unknown device appears/disappears when plugging/unplugging the device.
  • Reboot and retry.
  • Again for Windows only, do you get the USB Connection sounds when plugging/unplugging?
  • \$\begingroup\$ Im currently waiting for my group-mate's laptop. I did look to the Device Manager, under the port section there is Communication port(COM1), (COM0 and 10) is used by my USB internet and there is Printer port (LPT1) but there is no change when I connect and disconnect the device. I did not get the USB connection sound when I pligged it. \$\endgroup\$ – NewInEverything Jan 29 '14 at 3:12
  • \$\begingroup\$ So is the device still working? (I realize it powers up, but can you tell if the last code you uploaded is functioning when you power it up?) To me it sounds like your 'duino is damaged. You may want to go back and look at what you had connected to it before it stopped working. Could something have gotten shorted, connected to the wrong voltage source, etc? \$\endgroup\$ – Ryan Griggs Jan 29 '14 at 3:31
  • \$\begingroup\$ Also, since it's a clone, I wonder how good the solder reflow job was done? try plugging in the USB cable, then use a pencil eraser or other tool to press down firmly on the various chips on the board. See if anything happens to indicate the computer detecting the device... if so, you've got bad solder connections from a poorly done reflow operation and/or poor QA. \$\endgroup\$ – Ryan Griggs Jan 29 '14 at 3:33
  • \$\begingroup\$ I think its still working because it is still powering on and it can even do the codes I uploaded to it when connected in the battery.So I connected it to another laptop and it dont recognize it. The last code is a simple calculating codes, like I says it is working at this time. According to the place I bought it Power Input: External:8V-12V USB:5V. Do you think because I connected it to the usb type with a source of 7.4 volts? if that is the reason why did the problem occur just now? \$\endgroup\$ – NewInEverything Jan 29 '14 at 3:40
  • \$\begingroup\$ The most recent arduino Uno reference schematic shows an automatic switch between VIN and VUSB (arduino.cc/en/uploads/Main/arduino-uno-schematic.pdf) so I think it would not hurt to have both connected. However, with your clone, do you have a manual switch to select one or the other? Not sure this would even be a problem. What else did you have connected to the device? \$\endgroup\$ – Ryan Griggs Jan 29 '14 at 3:47

[I] used the VUSB alone with a 7.4v while the VUSB only accepts 5v[,] will this hurt the device?

Yes it will.

The gizDuiono uses a Prolific PL-2303 serial USB IC.

It's data sheet says

USB Port VBUS, 5V Power. (6.5V for OTPROM writing voltage).
The OTPROM can be programmed twice
Power Supply Voltage - VDD_5 -0.3 to 6.5 V

So it's possible you've either fried this chip or corrupted it's ROM.

  • \$\begingroup\$ Yes I did burned the chip. I send it to the manufacturer to be fixed. thanks \$\endgroup\$ – NewInEverything Jan 30 '14 at 12:55

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