voltage level monitor circuit ?

Hello,

So for my application, i need to have a circuit that can monitor the input voltage until it reach 5V (usually from 0V ) then switch on and allow the 5V to flow into another circuit. 

The problem is i have no idea where to start. Can anyone help me ? 

Thank you very much

iceng20 days ago

Look into comparitor integrated circuits (IC)...

This kind of IC will output a high to low or low to high when it detects a voltage crosses 4.95 Volts and you can use the high or the low to turn on a transistor switch (Like_a_Mosfet) to flow 5V power into another circuit...

https://www.jameco.com/z/LTC1440CN8-PBF-Linear-Tec...

And a PDF with application how to use this IC

https://www.jameco.com/Jameco/Products/ProdDS/1749...