AT89C51 how to give power

[zulkarneyn]

Hi I just finished the code for my project and now I will set up the hardware. I am thinking on 2.1mm DC jack and using a 5V – 3A power adapter to give power to the circuit. But I am not sure whether it is correct or not.

 

Would it work if I directly connect this 2.1mm Jack’s Voltage pin to the 8051’s VCC pin or do I need to set up another circuit for this? Because in several kits I saw voltage regulators and stuff…

 

Please help me

[doraemon]

most of adaptors(AC to DC convertor) has no voltage regulator so output voltage varies with varying current of load. So if you already have adaptor you mentioned measure output voltage if it is 5v then ok if voltage more than 5v then use 5v voltage regulator with resistor of 100ohm because 5v regulator like 7805 has max current rating of 1Amp.

[zulkarneyn]

Thank you, I’ll do that

[Author]

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