Hello,
I recently bought a K8055n kit. Having soldered this together (which posed no problems, the kit is well made up and the instructions simple), however it did not work. Once I plugged it in the only signal I´m seeing is that the power LED LD11 lights up but there´s none of this other flashing etc of any other LED´s and the computer doesn´t seem to see the card at all. I have inserted the dll in the sysWOW64 folder as instructed.
When I open the demo program I get the message “card 0 not found”. I have also tried to access using other addresses in case the bridges were not working properly but no change. I have tried different USB cables (all work with other devices). The demo program recognises the dll.
My latest try was to test this on an older laptop with XP in 32 bit. I have copied the dll to system32. Same problem. dll recognised but only the power LED comes on.
I am using Windows 7 64 bit, but I think the problem is in the hardware, possible IC3 defect would be my guess. I have tried the USBview.exe and cannot see the card here either. I have checked the soldering under a professional high powered microscope, so obviously only an optical check, but all looks to be correct, no solder spilling out causing shorts or anything like that.
Anybody else had this problem? Suggestions please, or should I just send this back to Velleman?
The LED LD8 should give three flashes when the USB cable is connected.
The first two flashes indicate that the CPU starts to run.
If LED LD8 stays on, it indicates that the USB enumeration process fails and the PC doesn’t detect the card.
It seems the microcontroller IC3 is not running.
You can return the card for check/repair.
[quote=“VEL255”]The LED LD8 should give three flashes when the USB cable is connected.
The first two flashes indicate that the CPU starts to run.
If LED LD8 stays on, it indicates that the USB enumeration process fails and the PC doesn’t detect the card.
It seems the microcontroller IC3 is not running.
You can return the card for check/repair.[/quote]
I recently bought the K8055N through CONRAD. It seems to have the problem as described above. LED8 flashes two times and stays on. My PC doesn’t recognize the card.
Can I check IC3 in a simple way, or is the only solution to send the module back to CONRAD?
My problem turned out to be the capacitors. I must have mixed them up - they do all look very similar. Try to check this before you send it back and pay the bill for the repair!
No. Can´t remember exactly, but definately the ones on the Quartz Oscillator were mixed up with other similar looking ones. For sure they look very similar and although I took great care in building it, seems I got it wrong anyway. Now I have a multimeter which can measure capacity - wish I´d had it back then. The repair at Velleman was not expensive but the shipping charges were.
I solved another way. I resent the module to the supplier and bought teh built one.
This board arrived today and I simply connected it. At first glance the same problem, led8 flashes twice and stayed on, but then windows 7 started looking for a new device. After some time it was found and the board acted properly with the demo software.
Finally I can gon on.
Seems as if the K8055N board is not recognized or detected by windows 7 (64 bit) and consequently the hardware is connected.
Thanks for the help
I did already connect the old board through a USB hub, did not work!
After I installed the already built card (VM110N), it works fine with the demo program.
But how can I include in visual basic 2010 express the k8055n.dll, using the functions etc results in a message k8055n.dll not found.
rgs John Kevers
In 32-bit operating system, copy the DLL from the package’s folder \DLL_v5.0.0.0 to the \Windows\System32 folder .
In 64-bit operating system, copy the DLL to \Windows\SysWOW64 folder.