Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
...what if the output voltage is tap in the collector side?
thanks
but we are not allowed to use IC only zener,bjt,resistors only
@mikeml thanks well said
1 one more Q
what if the output voltage is tap in the collector side?
im just wondering
Who is setting those rules? You say this isn't homework?but we are not allowed to use IC only zener,bjt,resistors only
What node does the collector connect to?
Isn't that where the unregulated input comes from????
We dont do it that way however because doing it that way the transistor would exhibit voltage gain as well as current gain.
CAN YOU POST the circuit here????I'm not Mike but you could just use two LM317 regulators, the first one with a resistor to make it a 500mA constant current source, the second one with two resistors to make it a 5.2v voltage regulator.
That's a total of two 3-pin regulators, a heatsink and three resistors and job done.
Hello again,
Sure, a voltage regulator does that. If the input is 12v, you get 5v out, if the input is 11v, you get 5v out, if the input is 10v you get 5v out, you always get 5v output UNLESS the input goes below some minimum requirement, and the difference between the input and output at that point is called the "dropout voltage" of the regulator. For example, if the dropout voltage is 2 volts and the output is 5v, then the min input voltage is 7 volts or else the output will start to drop.