# How do I get 5V from 3V?

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

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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.