pic programming failed

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Re: pic programming failed

Postby oliboy » Sat Aug 01, 2009 5:17 pm

1. PIC is not powered up when you try to program it.



how do i know that my pic is powered up?..
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Re: pic programming failed

Postby dmitri » Sat Aug 01, 2009 5:23 pm

oliboy wrote:1. PIC is not powered up when you try to program it.



how do i know that my pic is powered up?..

By powering it up. You power it up over USB when you try to program it, don't you?
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Re: pic programming failed

Postby oliboy » Sat Aug 01, 2009 5:53 pm

yes....but how will i know its powered up?..
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Re: pic programming failed

Postby dmitri » Sat Aug 01, 2009 6:10 pm

Firelord in the first reply gave you a link to a thread where it all discussed. On the second page of that thread it says how to check voltages: viewtopic.php?p=9046#p9046
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how to test?..

Postby oliboy » Fri Aug 21, 2009 1:13 pm

i need help...
i can't program my pic...
i need to check the voltages in my pic but i don't where to connect my testers probes...
can anyone please help me...
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Re: pic programming failed

Postby dmitri » Fri Aug 21, 2009 1:20 pm

Firelord in the first reply gave you a link to a thread where it all discussed. On the second page of that thread it says how to check voltages: viewtopic.php?p=9046#p9046
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Re: pic programming failed

Postby oliboy » Fri Aug 21, 2009 1:28 pm

do i have to remove the pic to test?..
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Re: pic programming failed

Postby dmitri » Fri Aug 21, 2009 1:34 pm

No
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Re: pic programming failed

Postby oliboy » Fri Aug 21, 2009 1:40 pm

i know how to read and use a tester but i don't know where to put the probes..where will i put the red or black probe of my tester when i read a voltage?..for example...i want to read voltage across pin 2...where will i place the probes?..
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Re: pic programming failed

Postby Firelord » Fri Aug 21, 2009 1:58 pm

oliboy wrote:i know how to read and use a tester but i don't know where to put the probes..where will i put the red or black probe of my tester when i read a voltage?..for example...i want to read voltage across pin 2...where will i place the probes?..

Here's a straight answer.

digital-board-brd_probing.png


On the image above, you see the digital board as it is (i.e. how you would see it from the copper side). Now, the green dot marks the ground. You should put the black probe of your meter to the ground. The red dots mark the 1, 14, 15 and 28 pins of the PIC. For obvious reasons, I didn't put all the numbers in there, but the bottom row is "14 13 12 11 10 9 8 7 6 5 4 3 2 1" and the upper "15 16 17 18 19 20 21 22 23 24 25 26 27 28". You should put the red probe - the testing probe - onto these pins and read the voltage levels on them. DON'T FORGET TO SET UP THE MULTIMETER TO THE DC VOLTAGE SCALE; selecting the 20V DC scale should be all right.

And, of course, always be careful with a USB powered board, do not accidentally short circuit the power lines.
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