----- If anyone can help me right now i will refer that person as a Fairy god. So please help me !!!!!! -----

OK, The thing i want to make is circuit for a buzzer to activate. Please don't refer arduino programmes. This circuit must be light weight Coz, i want to use it for a drone. Circuit must be work like this. There's a battery current line (3v 450mah-i also have 1450mah one too) and a current line used for a indicating, and it is lower than the battery current.When the indicating current line is "ON" The buzzer should be "ON". But it must use only battery current to alarm the buzzer. But it must not should be work unless indicating current line is turned "ON".Now you'll get what i'm gonna trying to say. I dont care even there are ic's too. But beware that it must be lightweight. So please tell me a tip for it.

Please!!! ​

 

Please Can Anyone help me quickly???? please!!!!

 

OK..
Find an active buzzer that can work at 3V first.

 

There's a battery current line (3v 450mah-i also have 1450mah one too) and a current line used for a indicating, and it is lower than the battery current.When the indicating current line is "ON" The buzzer should be "ON". But it must use only battery current to alarm the buzzer.

I have absolutely no idea what you are asking? Current line, what is a current line?

Ron

 

OK..
Find an active buzzer that can work at 3V first.

It's already working on 3v and even on low voltages like 1.5v

I have absolutely no idea what you are asking? Current line, what is a current line?

Ron

I mention "current line" for Electric power line. I mean the line which outputs electricity

Please can anyone help me please.!!!!

 

You have done a poor job of explaining what you want or need. If you want a current sensor circuit you need to define the current limits you are looking at. Nobody can offer much help as nobody can understand what exactly it is you want or want to do. If you want to measure current then again how much current at what voltage?

Ron

 

Here's a wild guess at something which might do what you want.

Like the others, I have no idea what properties your 'current line' has. We also don't know the current consumption of your buzzer.

 

Did "a rob" create a new account? Sounds suspiciously like him. And so does the project. "a drone", "light", "buzzer". Beware.

 

Who is that guy??? a rob???? I never heard about him. Oops, I'm new to here. Sorry mate your guess is wrong. Don't dislike me please. I promise that this is my first and only account in #allaboutcircuits.com.

Hey current means electricity line. Ok, Just replace "CURRENT LINE" for "ELECTRICITY LINE". If anyone need any other explanations let me know please!!!!

Here's a wild guess at something which might do what you want.
View attachment 129070
Like the others, I have no idea what properties your 'current line' has. We also don't know the current consumption of your buzzer.

My Buzzer works well with 1.5v and also 3v. I meant 'CURRENT LINE" for "ELECTRICITY LINE". If you need any other explanations please let me know!!!

I have absolutely no idea what you are asking? Current line, what is a current line?

Ron

I meant 'CURRENT LINE" for "ELECTRICITY LINE". If you need any other explanations please let me know!!!

You have done a poor job of explaining what you want or need. If you want a current sensor circuit you need to define the current limits you are looking at. Nobody can offer much help as nobody can understand what exactly it is you want or want to do. If you want to measure current then again how much current at what voltage?

Ron

I meant 'CURRENT LINE" for "ELECTRICITY LINE". If you need any other explanations please let me know!!!

Did "a rob" create a new account? Sounds suspiciously like him. And so does the project. "a drone", "light", "buzzer". Beware.

Who is that guy??? a rob???? I never heard about him. Oops, I'm new to here. Sorry mate your guess is wrong. Don't dislike me please. I promise that this is my first and only account in #allaboutcircuits.com.

Here's a wild guess at something which might do what you want.
View attachment 129070
Like the others, I have no idea what properties your 'current line' has. We also don't know the current consumption of your buzzer.

Can I know what is the Transistor type and number??? Seems like it's a NPN transistor.

 

Yes, it's an NPN transistor. The type and the other component values would depend on how much current your buzzer draws from the 3V supply.