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AT89s51 programmer and DB25

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niranjan23

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Hiiii ....

Can any one tell me the circuit attached below will run...??? Or something has to change..

Actually I have 5(five) AT89S51 IC's and they are wasting without Programmer ..:sad::sad::sad::sad:

I read all the Posts and reply's on to making AT89S51 & AT89C51 programmer but there is no efficient technique for programmer...and I waste so much...:sad::sad:

So please help me to make perfect Programmer ...thanku ...!!!
 

Simplest 25-pin LPT 89S51/52 programmer :

Asim's ISP loader.GIF

From USB port you can take 5V.

Tested and working like charm.

:wink:
 

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  • ISP-30a.zip
    173.3 KB · Views: 52

Thank you very much... sir

there one problem ..I have ISP programmer which I use NXP P89v51RD2BN MCu IC , I programmed this IC 40 to 50 times and it is working but now it is not working properly when Flash magic show Reset the device in ISP mode and I hold the reset button then it is not reset at all...I mean what is the problem..can U tell me please...Im confused :-?:-?:-?
 
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