Can't connect to the PK2-LITE - Electronic Circuits Projects Diagrams Free

avi · 1st October 2008, 09:49 PM

Hi all,
I've built the PK2 LITE circuit and I've installed the picKIT2 application from Microchip web site.
But, the application cann't identfy the Circuit,
even when I plug-in the USB cable to the PC, the Win. doesn't recognize nothing, no sound or window is opened.
where can I find an istructions how to use the PK2?

Another question, the +5v in the circuit is comes from the USB or should I connect an external voltage source?

TNX, your assistance will be appreciated.
Avi.

**3v0** · 1st October 2008, 10:04 PM

Did you program the 18F2550 ?

Quote:

Originally Posted by avi

Hi all,
I've built the PK2 LITE circuit and I've installed the picKIT2 application from Microchip web site.
But, the application cann't identfy the Circuit,
even when I plug-in the USB cable to the PC, the Win. doesn't recognize nothing, no sound or window is opened.
where can I find an istructions how to use the PK2?

Another question, the +5v in the circuit is comes from the USB or should I connect an external voltage source?

TNX, your assistance will be appreciated.
Avi.

avi · 6th October 2008, 03:06 PM

But, it still doesn't work..
my PC even doesn't recognize nothing when I plug in the USB cable to the PC

blueroomelectronics · 6th October 2008, 03:37 PM

All the USB needs to see a PK2 is a programmed 18f2550 a 20MHz crystal and caps , plus the USB connector and .47uF vreg cap. There are some versions of the schematc with the D+ & D- pins on the USB connector reversed.

avi · 10th October 2008, 05:59 PM

It's driving me crazy ...

I've reproggramed the PIC18F4552, and I've checked the circuit again..everything is OK..
Windows doesn't detect nothing when I plug-in the usb.

When I press SW1 (RB5 pull down) and plug-in the usb, then the Windows detects some un-recognized usb connection, and the "busy" LED blinks for a few sec.

I really don't know what to do...pls hlp.

TIA,
Avi.

blueroomelectronics · 10th October 2008, 06:13 PM

Quote:

Originally Posted by avi

It's driving me crazy ...

I've reproggramed the PIC18F4552, and I've checked the circuit again..everything is OK..
Windows doesn't detect nothing when I plug-in the usb.

When I press SW1 (RB5 pull down) and plug-in the usb, then the Windows detects some un-recognized usb connection, and the "busy" LED blinks for a few sec.

I really don't know what to do...pls hlp.

TIA,
Avi.

What is a 18F4552? The Lite schematic uses a 18F2550

mvs sarma · 10th October 2008, 07:33 PM

@Bill of Blueroomelectronics,
Sir, what is this PK2 LITE?Is it part of Junebug less tutor?

mvs sarma · 10th October 2008, 07:35 PM

Quote:

Originally Posted by avi

It's driving me crazy ...

I've reproggramed the PIC18F4552, and I've checked the circuit again..everything is OK..
Windows doesn't detect nothing when I plug-in the usb.

When I press SW1 (RB5 pull down) and plug-in the usb, then the Windows detects some un-recognized usb connection, and the "busy" LED blinks for a few sec.

I really don't know what to do...pls hlp.

TIA,
Avi.

Many times I saw cases whether D- and D+ wires of USB get interchanged? Even published articles from Elektor have issued corrections Later.

please check carefully. the USB B socket pin counting confuses, seeing from bottom or top. In USB A it can be clearly located pin adjacent to Ground is D+

blueroomelectronics · 10th October 2008, 07:44 PM

Quote:

Originally Posted by mvs sarma

@Bill of Blueroomelectronics,
Sir, what is this PK2 LITE?Is it part of Junebug less tutor?

Pretty much it's the prototype PICkit2 built to the bare minimum without tutor. The D+ & D- lines were switched but the Junebug manual versions are correct.

mvs sarma · 10th October 2008, 07:54 PM

Quote:

Originally Posted by blueroomelectronics

Pretty much it's the prototype PICkit2 built to the bare minimum without tutor. The D+ & D- lines were switched but the Junebug manual versions are correct.

Thanks Bill

avi · 10th October 2008, 09:29 PM

-------------

Quote:

Originally Posted by avi

It's driving me crazy ...

I've reproggramed the PIC18F4552, and I've checked the circuit again..everything is OK..
Windows doesn't detect nothing when I plug-in the usb.

When I press SW1 (RB5 pull down) and plug-in the usb, then the Windows detects some un-recognized usb connection, and the "busy" LED blinks for a few sec.

I really don't know what to do...pls hlp.

TIA,
Avi.

Mickster · 10th October 2008, 10:39 PM

Have you checked the D+ and D- lines, as Sarma suggested?

One less problem to rule out.

blueroomelectronics · 10th October 2008, 10:51 PM

It doesn't require any special drivers; it'll appear as a simple HID device like a mouse. Run the PICKit2 standalone software to see if it sees it.
You must have the .47uf cap and it must be a 20MHz crystal. The flashing red led should only flash if you hold down the button before plugging in the USB.
How did you initially program the 18f2550?

Mickster · 10th October 2008, 11:00 PM

Quote:

Originally Posted by blueroomelectronics

How did you initially program the 18f2550?

His 2nd post in this thread, 3rd post from the top, says he programmed the '2550 with "ART2003".

blueroomelectronics · 10th October 2008, 11:03 PM

That's what I get for doing this on an iPhone. I'll have to see what an ART2003 is.

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1st October 2008, 09:49 PM	(permalink)
avi	Can't connect to the PK2-LITE Hi all, I've built the PK2 LITE circuit and I've installed the picKIT2 application from Microchip web site. But, the application cann't identfy the Circuit, even when I plug-in the USB cable to the PC, the Win. doesn't recognize nothing, no sound or window is opened. where can I find an istructions how to use the PK2? Another question, the +5v in the circuit is comes from the USB or should I connect an external voltage source? TNX, your assistance will be appreciated. Avi.

6th October 2008, 03:06 PM	(permalink)
avi	Yes, i've programmed the PIC2550 using ART2003 But, it still doesn't work.. my PC even doesn't recognize nothing when I plug in the USB cable to the PC

6th October 2008, 03:37 PM	(permalink)
blueroomelectronics	All the USB needs to see a PK2 is a programmed 18f2550 a 20MHz crystal and caps , plus the USB connector and .47uF vreg cap. There are some versions of the schematc with the D+ & D- pins on the USB connector reversed. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com

10th October 2008, 05:59 PM	(permalink)
avi	It still doesn't work It's driving me crazy ... I've reproggramed the PIC18F4552, and I've checked the circuit again..everything is OK.. Windows doesn't detect nothing when I plug-in the usb. When I press SW1 (RB5 pull down) and plug-in the usb, then the Windows detects some un-recognized usb connection, and the "busy" LED blinks for a few sec. I really don't know what to do...pls hlp. TIA, Avi.

10th October 2008, 07:33 PM	(permalink)
mvs sarma	@Bill of Blueroomelectronics, Sir, what is this PK2 LITE?Is it part of Junebug less tutor? __________________ Regards, Sarma.

10th October 2008, 10:39 PM	(permalink)
Mickster	Have you checked the D+ and D- lines, as Sarma suggested? One less problem to rule out.

10th October 2008, 10:51 PM	(permalink)
blueroomelectronics	It doesn't require any special drivers; it'll appear as a simple HID device like a mouse. Run the PICKit2 standalone software to see if it sees it. You must have the .47uf cap and it must be a 20MHz crystal. The flashing red led should only flash if you hold down the button before plugging in the USB. How did you initially program the 18f2550? __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com

10th October 2008, 11:03 PM	(permalink)
blueroomelectronics	That's what I get for doing this on an iPhone. I'll have to see what an ART2003 is. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com