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Can you power 9V with 5V?
A 9v to 5v voltage regulator can be implemented with an LM7805 step-down voltage converter. It is used for (10mA to 1 Amp and more) medium to the high current application. The unique about this circuit is its ability to provide the same output current as applied at the input end.
Can a transistor reduce voltage?
The transistor keeps lowering the voltage drop across the collector emitter junction (increasing the voltage drop across the 100Ω resistor and thus increasing the current) until the transistor saturates (i.e. can’t lower the voltage any more) at about 0.2V.
Is the other power supply compatible with 4.5V?
The other power supply is rated @ 2.5A for 4.5v,6v, 9v or 12v. It outputs 4.90v – 4.93v according to the same multimeter when on the 4.5v setting. Can I use the other power supply (checking polarity and ensuring that the device does not exceed 2.5A of current)?
How does a 5V to 9V converter work?
Generally, LM317 is used as a variable power supply that can provide variable output voltage (1.25V to 37V) depending on adjust the voltage on pin number 1 (Adj.) which is reference voltage taken from a potentiometer. Here it is a voltage divider circuit using which LM317 gives a fixed output voltage of 5V.
What’s the minimum voltage for a 5V power supply?
Another thing to note: Most digital devices today that run off 5V feed that rail directly into a voltage regulator which drops it to 3.3V or lower. Those devices need the input voltage to be a little higher than the target voltage, so maybe 3.6-3.9V at a minimum.
What kind of DC supply do I need for a 9V circuit?
A wide range of IC’s and devices require 5 V DC supply for proper operation. When working with a 9V battery supply, it becomes quite difficult to get a 5V dc power supply for the circuits. Here are the simple circuits that provide +5V from a 9V radio battery.