Drive ckt for AT89C51

swapnakumar

@swapnakumar-lJkNkk • Oct 8, 2024

Oct 8, 2024

1.0K

HELLO EVERYBODY!!!
plz suggest me a ckt 2 drive AT89C51 ive used opamp,transistors but it seems big so help meee!!!

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Harshad Italiya

@harshad-ukH5ww • May 13, 2009

Why not you go with simple 7805 Regulator.!!
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swapnakumar

@swapnakumar-lJkNkk • May 13, 2009

thanks for ur reply.
ive already used 78M05CT regulator from Ntional semi
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swapnakumar

@swapnakumar-lJkNkk • May 13, 2009

i actually wanna implement 3 conditions in my ckt
low
on grade
high
with this in mind i m tryng 2 implement Atmel mc with combo of transistors,opamps
also a regltr.
can u suggest sumthng?
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Harshad Italiya

@harshad-ukH5ww • May 13, 2009

You need. 5V, Low Volt and High volt Derived from one Supply Right?
means 3 different volt you need!
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swapnakumar

@swapnakumar-lJkNkk • May 13, 2009

ya u got me ri8
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Harshad Italiya

@harshad-ukH5ww • May 13, 2009

Can you please specify that low and high voltage please
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swapnakumar

@swapnakumar-lJkNkk • May 14, 2009

LED's indicating LOW level as d voltage falls below 10V and HIGH if it exceeds 10V
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Harshad Italiya

@harshad-ukH5ww • May 15, 2009

oh this is the function of your circuit then you are right.... you need Opamp with it make the comparator circuit which checks the voltage level and gives high or low output according to that.....

Means your input voltage is AC right which you are going to check With Respect to 10V...
then make one section of OPAMP which compares that... and other section which is power supply for 8051...then...

AC volatage-->Bridge circuit(4 diode)--> 7805 Regulator

Please try to make something like this then post it here if there is any problem then we will guide you surely.

Enjoy!!
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swapnakumar

@swapnakumar-lJkNkk • May 17, 2009

thank u so much
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Harshad Italiya

@harshad-ukH5ww • May 17, 2009

You are Welcome Swapnakumar!!

Enjoy your Stay Here
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