Lm7805 voltage regulator

1504

1d 19:29:54

Lm7805 voltage regulator from 9v to 5v
It can be used in charging smartphone battery. 

published 10 years ago

Voltransistor

10 years ago

You are killing amperage through the PNP transistor.

Voltransistor

10 years ago

I made an efficient voltage regulator circuit for you. :-)

chavezjvx

10 years ago

Excuse me what function have the capacitor in the circuit

Voltransistor

10 years ago

@chavezjvx-It smoothes out the current, because it regulates properly and when you convert from ac to dc from the ripples that a passes to 0v, so it's no longer 0v. Honestly, I never put a capacitor in for my regulator circuits. It's not important with a simple regulator circuit, just a conversion circuit.

chavezjvx

10 years ago

Thanks @voltransistor for your answer my friend I'm studying ing electronic and you ?

WTFCircuit

9 years ago

LM7805 can regulate every sort of input upper of 7V into 5V, but this circut works only with a perfect 9V input

darkjunich29

7 years ago

Excuse me , i want to ask questions about this circuit. Yes, as you describe the circuit to lower the big voltage source so we can use the result into a smartphone, I have seen another circuit by using a motorcycle accu (12 - 24 V) and an IC 7805 on it But still : 1. What is an IC 7805 itself ? Why i can't find the syombol of it in everycircuit? 2. What is the PNP bipolar transistor function on the circuit ? Is that another name of that IC 7805 ? THANKS

AmeXR

7 years ago

yES what is the LM7805 ?? A transistor? what symbol do you use if it isn't ? Thanks

AmeXR

7 years ago

It would be good to have some parts descriptions on some of the circuits and where to select them from in the app...

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