Quick Answer: How Do You Reduce Voltage In A Circuit?

How do I reduce 5v to 1.5 V?

In voltage divider circuit you want to drop 3.8V across R1 to get Vout = 1.5V.

This can be done by n number of combinations of R1 & R2 values.

For e.g.

you can use R1=3.8K and R2=1.2K or R1=3.8Ω and R2= 1.2Ω..

Can I use 4.5 V instead of 5v?

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. Bottom line, you should be fine with the 4.5V supply.

How do you reduce AC voltage?

Re: How to Reduce low AC voltageObtain a transformer that converts 120 vac to 10 vac.Use a second transformer to convert 20 vac to 10 vac.Convert to DC and use an oscillator to generate 10 vac.Install a series resistor equal to the load impedance, so half the voltage is across the resistor and half across the load.More items…•

How do I reduce 220v to 12v?

A step-down transformer would help you reduce your 220V AC to a more manageable 20V or 30V AC. Then you can use a rectifier to convert this AC to DC. Finally, use a voltage regulator such as the LM7812 to convert 20V DC to 12V DC.

How do you regulate voltage?

DC voltage stabilizers Many simple DC power supplies regulate the voltage using either series or shunt regulators, but most apply a voltage reference using a shunt regulator such as a Zener diode, avalanche breakdown diode, or voltage regulator tube.

How do I reduce 5v to 4.5 V?

Just put a silicon diode (e.g. 1N4001) in series with the laser supply, it will drop a fairly consistant 0.7v. Use two, if you want to be on the safe side. Just put a silicon diode (e.g. 1N4001) in series with the laser supply, it will drop a fairly consistant 0.7v. Use two, if you want to be on the safe side.

How do you reduce voltage from 19v to 12v?

The simplest way is a 12 v battery and a resistor from its positive terminal to the 19 v positive supply. Connect the load accross the battery. And the other terminal of the 19 v to the other terminal of the battery… .

How do you reduce 9 volts to 3 volts?

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 reduce 5v to 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 capacitors reduce voltage?

The conventional method is the use of a step-down transformer to reduce the 230 V AC to a desired level of low voltage AC. The most simple, space saving and low cost method is the use of a Voltage Dropping Capacitor in series with the phase line.

How does voltage increase without current?

In order to change the voltage without changing the current, you must change the resistance a porportional amount. If the load resistance varies, you can use a constant current source to maintain the current level, as hgmjr implied.

How do you reduce a 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.

How do you reduce voltage from 12v to 5v?

Convert 12V DC to 5V DCStep 1: Take All Components As Shown Below and in Pictures. Components required – … Step 2: Connect Input Power Supply. 7805 voltage regulator contain three pins.In which we have to give power supply on pin-1 and pin-2. … Step 3: Output Power Supply. … Step 4: Wiring Is Completed. … Step 5: Checking.

How can you reduce voltage without current?

First, connecting them directly in parallel is not a good idea – if the voltages are imbalanced, they will not share the current evenly. Balancing resistors can help with this. To reduce the voltage down to 6, there’s a number of possibilities, depending upon how precise the voltage needs to be.

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!