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Sonsivri > Electronics > General Electronics (Moderators: o2, pickit2) > AT89C51 Based Digital Power Supply Help
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sureshsharma2032
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« on: July 04, 2010, 06:30:58 18:30 »
I download the source code and some of the protelse99 design files with a photo from this site, but no design included of Proteus. So, I build it in Proteus but, I am not getting this working, Pls can anyone help what the problem is about or can anyone make this circuit working.
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chinninitin
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« Reply #1 on: July 22, 2010, 05:47:58 17:47 »
Hi Suresh,

I have tried some thing to modify,  some how I made it running,  but not fully working,  needs to check code also and voltages,
It requires negative voltage also for op-amp. 

If you give me some more inputs about voltages,  I can make it run.

attached is updated file.  (.dsn)
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sureshsharma2032
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« Reply #2 on: July 23, 2010, 06:04:07 06:04 »
I have supplied all the files including source code what else can I give. I didn't understand about what you are saying "give some more inputs about voltages". I have checked the circuit only one display is on. The purpose of the circuit is not working yet.
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chinninitin
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« Reply #3 on: July 30, 2010, 11:31:52 11:31 »

Check following

1) Op-amp requires duel supply?
2) Ground connections are proper, what I mean to say is,  DAC Gnd, MCU gnd, Opamp Gnd and REgulator...
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