# How do I get 5V from 3V?

## How do I get 5V from 3V?

The simplest possible step-down circuit is a resistive divider. Drive your 5V output into a chain of resistors, from which you tap your 3.3V logic input. A chain consisting of a 2.2k and a 3.3k resistor should produce a 3V output from an applied 5V input.

## How do you convert 9V to 3V?

To reduce a 9V battery to 3.3 volts, use a zener diode, such as a 1N746 or a 1N4728A. Choose the appropriate one based on how much power it can dissipate. A 1N4728A has a 3.3-volt and a 1 W power rating. It can supply, on average, a stable 3.3 volts to a circuit or another component.

How do I convert 12V to 9V?

To reduce a 12V circuit to 9V, place two resistors in series within the circuit. Find the difference between the two voltages (12V – 9V = 3V) to determine the total amount of resistance needed.

How much is 9 volts in Watts?

Equivalent Volts and Watts Measurements

Voltage Power Current
9 Volts 9 Watts 1 Amps
9 Volts 18 Watts 2 Amps
9 Volts 27 Watts 3 Amps
9 Volts 36 Watts 4 Amps

### Do Resistors reduce current or voltage?

In short: Resistors limit the flow of electrons, reducing current. Voltage comes about by the potential energy difference across the resistor. The mathematical answer is that a resistor is a two-terminal electric device which obeys, or you could say enforces, Ohm’s law: V=IR.

### Can I use 9V battery for 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.

Is there a 3V to 5V step up circuit?

Schematic of 3V to 5V Booster Circuit At the heart of the circuit is one tiny chip HT7750A, which is a “pulse frequency modulation” (PFM) step-up DC/DC converter with high efficiency and low ripple. The chip features extremely low start-up voltage and high output voltage accuracy.

How many AA cells are used in a 3V led circuit?

The above diagram shows a 3V LED circuit, in this circuit there are two AA cells are used. When you are operating an LED with 3V you have to use minimum 10 ohms resistor . For more details visit Simple Basic LED Circuit

## How can I get 3.3V from an IC?

You still can obtain 3.3v from the above circuit. All you have to do build a voltage divider between the Adj and Out pin of this IC. The formula for calculating the R1 and R2 values is

## What kind of resistor do I need for 3V led?

The above diagram shows a 3V LED circuit, in this circuit there are two AA cells are used. When you are operating an LED with 3V you have to use minimum 10 ohms resistor . For more details visit Simple Basic LED Circuit Step 2: 6 Volt Basic LED Circuit With 390 Ohms Resistor.