I have successfully created a replacement board for the demo that
comes with the pickit2. my board supports the same chips as the
original, only it mirrors ALL of portc to LEDs as well as portb.
also, it has a second DIP socket intentionally left empty, to which
all pins are mirrored. This makes for easy probing of the sockets for
which i do not have LED indicators. make sense ? the important thing
here is, i rigged it up, slapped on a capacitor, and it works. EVERY
TIME.
then i tried the same thing for a 28pin. pin1 is VPP, 8 and 19 are
VSS, 28/29 are icspdat/clk, and pin 20 is vdd. Simple enough. I've
tried every possible VSS combination, with and without capacitance (At
various levels) at best my pickit will see the 16f883 i am using
60-70% of the time. it seems to like seeing the chip every other time
i try. I've read the docs on the 883, on ICSP, and i've taken a look
at Microchip's schematic for their 28pin demo board. But alas, i am
missing something.
What in the living hell am i missing ? Honestly, i'm starting to
think my pickit is damaged/faulty. Oh, by the way, i've tried 3
different 883s in the unit, 2 of which had never been touched before
this AND i was careful about static and whatnot.
I'm hoping this is something stupid on my part. Thanks in advance.
comes with the pickit2. my board supports the same chips as the
original, only it mirrors ALL of portc to LEDs as well as portb.
also, it has a second DIP socket intentionally left empty, to which
all pins are mirrored. This makes for easy probing of the sockets for
which i do not have LED indicators. make sense ? the important thing
here is, i rigged it up, slapped on a capacitor, and it works. EVERY
TIME.
then i tried the same thing for a 28pin. pin1 is VPP, 8 and 19 are
VSS, 28/29 are icspdat/clk, and pin 20 is vdd. Simple enough. I've
tried every possible VSS combination, with and without capacitance (At
various levels) at best my pickit will see the 16f883 i am using
60-70% of the time. it seems to like seeing the chip every other time
i try. I've read the docs on the 883, on ICSP, and i've taken a look
at Microchip's schematic for their 28pin demo board. But alas, i am
missing something.
What in the living hell am i missing ? Honestly, i'm starting to
think my pickit is damaged/faulty. Oh, by the way, i've tried 3
different 883s in the unit, 2 of which had never been touched before
this AND i was careful about static and whatnot.
I'm hoping this is something stupid on my part. Thanks in advance.