Feedback Circuit Design for sensing DC 45V

dineshkumar mani

Hi everyone!.....

I want to check DC 45V drop is available or not, and i have planned to design a feedack cirucit using transistor, this feedback signal is passes to MSP430 controller. here i have attached a BC107 datasheet link.

Feedback circuit details:

Collector to base bias feedback, want to find the values of resistors Rc,Rb,Re......
actually, my doubt is , how to find collector current, base current , Vce, Vbe from datasheet?,,,,,,,,,,,pls help

http://www.nxp.com/documents/data_sh...807W_BC327.pdf

over 10 years ago

Dennis Eichmann over 10 years ago

Guru 74080 points

Hi!

I do not understand what you want to do. Do you just want to detect if there are 45V present or not? If so, are the 45V fixed? So 0V or 45V with nothing in between?

You could use a simple resistor divider and an input pin. Or a comparator. Please say a little bit more about your plans. And if possible you could add a schematic (even hand-drawn) for better understanding.

Dennis

dineshkumar mani over 10 years ago in reply to Dennis Eichmann

Intellectual 300 points

I couldn't able to attach schematic on here..i want to sense 45v is present r not .....give ur mail id, i will send schematic

dineshkumar mani over 10 years ago in reply to Dennis Eichmann

Intellectual 300 points

I couldn't. Able. To attach schematic on here.....i want to sense 45v presence or not? Give your mail id ....i will send schematic

Dennis Eichmann over 10 years ago in reply to dineshkumar mani

Guru 74080 points

Press on "rich formatting" on the lower right. There you have the options to include pictures and files.

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Feedback Circuit Design for sensing DC 45V