 # Quick Answer: How Do I Reduce 12v To 5v?

## How do you convert a transistor 12v to 5v?

Steps to Connect:Connect 3.3v GPIO pin to 1k Resistor.Other end of 1k Resistor connect to 2N3904 Transistor(Base)2N3904 Transistor (Emitter) is connected to Ground.2N3904 Transistor (Collector) connect to one end of Multimeter.5v +ve supply connect to other end of Multimeter.5v -ve supply connect to ground..

## How do you reduce voltage from 12v to 5v with a resistor?

Connect 12 v to pin 1 ,pin 2 is the ground and pin3 gives 5v. Don’t want to use IC or not getting it,use a voltage divider using 2 resistors and you are done with it. Connect 12 v across the series combination of 4.7k ohm and 6.8k ohm(readily available standard ) resistor and take the output across 4.7k ohm.

## What resistor do I need to drop 12v to 5v?

PLace two resistors in series with the 2nd resistor value (5/7) of the first resistor value. Place the resistors between 12v and ground and then you will get 5v at the point between them. This is a very crude way of doing it. It is unregulated so the voltage out will be dependent of voltage in.

## What resistor do I need to drop 5v to 3v?

So back to our circuit, if we have 5 volts and want 3V from it, we use the formula above. If we use a 10KΩ as our R1 resistor, plugging in the values, we get R2= (V)(R1)/(VIN – V)= (3V)(10KΩ)/(5V – 3V)= 15KΩ. So we can use a 15KΩ resistor as our R2 resistor with the R1 resistor being 10KΩ. Let’s do one more example.

## Can I use a 12 volt battery on a 9 volt device?

In most cases, you cannot use a 12V adapter to power a 9V guitar pedal. Using a 12V adapter on a pedal designed to only handle 9V can completely destroy it. … Voltage is only one part of the picture and even if you get the voltage right, it’s possible for a power supply to ruin your pedal.

## How do you reduce 12 volts to 9 volts?

Step Down the Voltage Install the smaller resistor first, stepping down your voltage from 12V to 11V. Once you’ve added the first resistor to your circuit, install the larger resistor to step the voltage down again. This resistor will take the remaining 11V current and reduce it to the 9V output you desire.

## What resistor do I need for 5v LED?

Basics: Picking Resistors for LEDsPower Supply VoltageLED ColorResistor (rounded)5 VBlue, Green, White, or UV68 Ω5 VRed, Yellow, or Yellow-Green150 Ω5 VRed, Yellow, or Yellow-Green56 Ω9 VRed, Yellow, or Yellow-Green75 Ω4 more rows•Aug 29, 2012

## How do you convert 12v to 5v 2a?

12V battery to 5V 1.5A DC converter Which is a simple circuit using IC-7805, to the fixed regulator 5 volts and TIP41-NPN power transistor to increase current up to 2A. I use the 7805 power supply with the 12V battery. To reduce the constant voltage of 5 volts.

## How do I reduce 9v to 5v?

This is the circuit used to convert 9V to 5V in such cases. IC7805 is a series voltage regulator IC which gives you a fixed voltage of 5V at output with maximum of 1A current in TO-220 package (commonly given) and upto 2A in TO-3 package with adequate heat-sinks!

## Do I need a resistor for a 12v LED?

Let’s assume 20mA, though most LEDs will light more than adequately with much less than this. So now the mathematical bit. You give too little information for a definitive answer. If this is a “12V” LED, which generally will consist of several LED chips in combination, no resistor is required.

## Can I use 12v for 5v?

It is Ohm’s law. Your device is R and 12/5V is V. Current is decided by Ohms law, I=V/R. With 12V your device will draw double the current and gets heated up because all current limiting values of your device are calculated for 5V source.

## How do I convert 7805 to 12v to 5v?

PROCEDURE:Let’s have a look at the pin configuration of 7805 IC.Connect the 7805 IC in the Veroboard.Now connect 470uf and one 0.1uf capacitor parallelly with pin 1,2.Now similarly connect 220uf, 0.1uf capacitor parallay with pin 2,3 as connected in the diagram below.

## How many LEDs can be connected in parallel?

Wiring LEDs in parallel allows many LEDs to share just one low voltage power supply. We could take those same four 3V LEDs and wire them in parallel to a smaller power supply, say two AA batteries putting out a total of 3V and each of the LEDs would get the 3V they need.

## How do you reduce voltage drop?

The simplest way to reduce voltage drop is to increase the diameter of the conductor between the source and the load, which lowers the overall resistance. In power distribution systems, a given amount of power can be transmitted with less voltage drop if a higher voltage is used.

## What resistor do I need to drop 12v to 9v?

12v to 9v converter using zener diode: The load must be connected to the output end to prevent zener from getting damaged. Series resistor 10 ohm is a current limiting resistor and when high current is drawn it has to pass that current through it, thus 5-watt resistor is necessary.