 # Quick Answer: How Do You Reduce A Resistor From 12v To 9V?

## How can I reduce 12V to 5V?

12v to 5v converter using a voltage divider: One 12v battery, 1.8k resistor, 1.3k resistor, connecting wires.

This circuit is a voltage divider schematic.

You can design it for the required ‘output voltage’ by using this formula: Here, Vout is the output voltage taken across resistor R2..

## How do you reduce a 9V to 5v with a resistor?

9v to 5v converter using a voltage divider: You can connect two LEDs in series across the output of R2 resistor if you are using a 9volt battery as an input. Components required: One 9v battery, 1.5k resistor, 1.2k resistor, some multicolor connecting wires. It is a simple voltage divider configuration.

## Can I use 12V 2A for 12V 3A?

Yes. The 3A is the maximum current it can supply but it works fine delivering less current. For example, when this adapter is plugged but not connected to your device the current is zero but the voltage is 12V.

## What size resistor do I need to reduce voltage?

The short answer is “don’t do that.” The voltage dropped by a resistor is given by Ohm’s Law: V = I R. So if you know exactly how much current your device will draw, you could choose a resistor to drop exactly 7.5 V, and leave 4.5 V for your device, when that current is run through it.

## How do I reduce 12V to 15v?

To drop from 15v to 12V at 5amps , that is drop 3volts at 5amps requires a 0.6R resistor, rated at LEAST 15Watts. To be sure it didnt get overheated I would use a 25Watt or higher resistor.

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

Level ShiftersResistor CombinationUse4.7 kΩ and 6.8 kΩ12V to 5V4.7 kΩ and 3.9 kΩ9V to 5V3.6 kΩ and 9.1 kΩ12V to 3.3V3.3 kΩ and 5.7 kΩ9V to 3.3V

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

To divide voltage in half, all you must do is place any 2 resistors of equal value in series and then place a jumper wire in between the resistors. At this point where the jumper wire is placed, the voltage will be one-half the value of the voltage supplying the circuit. The 5V is now 2.5V. VCC is split in half.

## How do I convert 12V to 5V?

12V battery to 5V 1.5A DC converter. If we need to use 12V to 5V voltage regulator. This is the 5V 1500mA DC regulator circuit. 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.

## Can I use 12V AC instead of 12V DC?

As long as the voltage of the “DC Appliance” is not less than the 12 Volt adapter then it will either work or won’t, all in all it’s a bad idea to experiment, actually it’s a bad idea just to even think about doing it, unless you know about what you are about to do, don’t.

## How do I convert 12V to 9V?

In this, you can convert 12v to 9v converter for making projects of 9v Rechargeable batteries and so on. Steps to Connect: Connect 12v +ve voltage to 7809 Vin pin and -ve to 7809 GND pin. You will get the output of 9v at Vout pin.

## How do you reduce voltage from 12V to 6V using a resistor?

It’s possible to step 12 volts down to 6 volts by incorporating a pair of 10,000-ohm resistors into the circuit. Cut two lengths of wire, and strip each wire of 1/2 inch of insulation at each end. Attach one end of the first wire to the positive terminal on the power supply.

## Can I use 12V for 9V?

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. There are some guitar pedals built to handle voltages higher than 9V. Those pedals will work perfectly fine with a 12V adapter.

## How can I reduce 12v to 120V?

How to Convert 120V to 12VAdd up the amperage needs of all devices that will be powered by your 12 volt power supply. … Shop for a power supply capable of supplying 12 volts as well as the total amperage all of your devices will need. … Plug in your power supply into a standard wall outlet and turn on the power switch if it is equipped with one.More items…•Sep 26, 2017

## How do you convert a resistor from 12V to 3v?

12v to 3v Voltage RegulatorStep 1: Material Requires. … Step 2: Schematic. … Step 3: Practical Aproach. … Frome same hole connects one end of 330-ohm resistance and another end to the ground. … Connect 12v supply. … From the junction of both resistor connect one 3v LED. … To verify Connect multimeter to the junction and measure the output voltage.More items…

## How can you reduce current without changing voltage?

Resistors in series would drop the voltage. Instead you can connect a resistor in parallel that can draw 180mA of current while allowing 20mA to charge the battery.

## Does 12V work on 15v?

Can I use a 15v plug to a 12v device receptor? In the case of cooling fans the answer is generally yes. Most cooling fans accept a variable DC voltage of between 6V to 23V. Anything else I would say “No.” Wall bricks are cheap at around \$6 for a cheapo from Fry’s, and will step down 110V AC to 12V DC in a snap.

## How do I reduce 5V to 1.5 V?

This is a USB 5V to 1.5V/3V Step-Down Converter Circuit. It is used instead of a normal AA battery. In the circuit, we use LM317 DC voltage Regulator. To reduce the 5V input voltage from USB Port to the 1.5V at 1.5A maximum output.

## Can you reduce voltage with a resistor?

A resistor has the ability to reduce voltage and current when used in a circuit. The main function of a resistor is to limit current flow. Ohm’s law tells us that an increase in a resistors value will see a decrease in current. To reduce voltage, resistors are set up in a configuration known as ‘voltage divider’.

## How do you convert a resistor from 12v to 19v?

Connect the load accross the battery. And the other terminal of the 19 v to the other terminal of the battery… . The voltage to the load will be locked at 12 v and the current in the resistor will be the sum of the ohms law 19–12 , going into the battery,and the load current into the actual load..

## What resistor do I need for 12V LED?

Resistor = (Battery Voltage – LED voltage) / desired LED current. So assuming a 12-volt power source and a white LED with the desired current of 10 mA; The formula becomes Resistor = (12-3.4)/. 010 which is 860 ohms. Since this is not a standard value I would use an 820-ohm resistor.

## Is it OK to use higher voltage adapter?

Voltage too high – If the adapter has a higher voltage, but the current is the same, then the device will likely shut itself off when it detects an overvoltage. … The device could power on and just draw more current from the adapter than it’s designed for. This could cause the adapter to overheat or fail.