pr11 help anyone?

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Re: pr11 help anyone?

Postby sich » Tue Sep 18, 2012 1:57 pm

Is there 5V at 7805 voltage regulator output pin? And also 5V at VDD pin of the PIC?
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Re: pr11 help anyone?

Postby black_smtk » Mon Sep 24, 2012 10:36 pm

still have problem when i try to program. anyone can help me??? it say target power 5v not detected. why??
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Re: pr11 help anyone?

Postby sich » Mon Sep 24, 2012 11:18 pm

sich wrote:Is there 5V at 7805 voltage regulator output pin? And also 5V at VDD pin of the PIC?

My question above is actually asking you to test the pins with multimeter.
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Re: pr11 help anyone?

Postby black_smtk » Tue Sep 25, 2012 7:08 am

i,ve check with multimeter. suppose to be o.k. 5v. i also had try using the sk4oc which have built in voltage regulator circuit right? should be no problem. actually ive use pic16f877a for the new circuit. i wonder what is the problem when it say " target power not detected". ive used dc adaptor. so the power supply should be o.k.
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Re: pr11 help anyone?

Postby yonghui » Tue Sep 25, 2012 8:15 am

have u try to use pickit2 standalone sofware? try tools --> troubleshoot, see what is the problem of pickit2
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Re: pr11 help anyone?

Postby robosang » Tue Sep 25, 2012 7:54 pm

You should try what yonghui suggested.

There is no problem with the UIC00B, this is due to MPLAB IDE. It will detect whether the target PIC have power or not before loading program, the standalone PICkit2 Programmer have different method. If you check the schematic of PR11, the VCC or 5V of circuit is not connected to the ICSP socket, in other words, the UIC00B pin that detect power is floating and will not detect the target is being powered.

There are a few method to overcome this, but I prefer using the PICkit2 Programmer GUI.
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Re: pr11 help anyone?

Postby black_smtk » Wed Sep 26, 2012 7:51 am

yonghui wrote:have u try to use pickit2 standalone sofware? try tools --> troubleshoot, see what is the problem of pickit2


ive try method above. test at 4.5v read 4.6v. it say everything o.k except for test with oscilloscope, i didnt try.
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Re: pr11 help anyone?

Postby black_smtk » Wed Sep 26, 2012 8:04 am

figure
tt1.png
here is the output
tt1.png (9.57 KiB) Viewed 1874 times
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Re: pr11 help anyone?

Postby black_smtk » Wed Sep 26, 2012 3:32 pm

for pr11, i want to change the pic from pic16f876a to pic16f877a. to do that, do i need to change the coding? all the connection is still same right? only need to setting mplab ide? i try the coding provided by cytron. any ideas anyone can share? :?:
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Re: pr11 help anyone?

Postby black_smtk » Wed Sep 26, 2012 8:37 pm

finally :lol: . my circuit can run. now need to modify to more advance features for fyp. thank to those help me. :mrgreen:
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