Recommends:
1. Remove the 0.1uF cap on VPP.
2. Try lower the Vdd on your PK2, please refer to this reference.

 Funny N.
Au Group Electronics, http://www.AuElectronics.com
http://www.AuElectronics.com/products
http://augroups.blogspot.com/




________________________________
From: solarwind <x.solarwind.x@gmail.com>
To: PICLIST <piclist@mit.edu>
Sent: Wednesday, August 12, 2009 2:20:39 AM
Subject: [PIC] My simple dev board is not working

I finished constructing my very simple PCB and PICKIT 2 is not working
with it. When I plug it in, PICKIT2 says:

PICKIT2 VPP voltage level error.
Check  target & retry operation.

So I rebuilt the exact circuit on a breadboard and it worked.

Here is the schematic: http://img18.imageshack.us/img18/617/schematic.png

Here is the board: http://img35.imageshack.us/img35/6794/boardq.png

The only variations I did were that I changed the value of the
polarized capacitor around (1 uF, 100 uF) and changed the value of the
resistors around (1K, 10K) during breadboard prototyping and it didn't
make a difference and everything still worked.

On the PCB, I replaced the 470 ohm resistor with a 1K and the 10 uF
electrolytic cap with a 1 uF electrolytic cap. On a breadboard, these
values worked, so I don't know why the PCB one isn't working.

Any ideas?

-- [ solarwind ] -- http://solar-blogg.blogspot.com/
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