Hello all!
In my project I built two different circuits, one of them gets 15V supply from lab power supply, and the other one is designed to work from 5V.
I wanted to use only one power supply in this project, so at first I tried to do a voltage divider by using 2 regular resistors to get 5V from the 15V and send this 5V to the second circuit, but when I connected this 5Volts to the second circuit, the voltage has dropped to around 1-2V.
I tried using an OpAmp as a buffer between the two circuits but the problem did not fix.
The next solution for me was to replace the buffer with a voltage regulator LM7805 and the problem is fix now.
I wanted to ask what may be the reason for this voltage drop? is it because the consumed current from the buffer that was higher than it can supply? and if so, why does it happen?
*Sorry for any English mistakes*
Thanks in advance!
In my project I built two different circuits, one of them gets 15V supply from lab power supply, and the other one is designed to work from 5V.
I wanted to use only one power supply in this project, so at first I tried to do a voltage divider by using 2 regular resistors to get 5V from the 15V and send this 5V to the second circuit, but when I connected this 5Volts to the second circuit, the voltage has dropped to around 1-2V.
I tried using an OpAmp as a buffer between the two circuits but the problem did not fix.
The next solution for me was to replace the buffer with a voltage regulator LM7805 and the problem is fix now.
I wanted to ask what may be the reason for this voltage drop? is it because the consumed current from the buffer that was higher than it can supply? and if so, why does it happen?
*Sorry for any English mistakes*
Thanks in advance!