How Can we Reduce 12V to 3V by Simply Using a Resistor

Yes, of course. Using only resistors it is possible to achieve different voltage levels. The combination is known as a resistor divider. The below image shows an example of using the resistor divider to achieve the objective of 12 V to 3 V.

The output voltage for this circuit is given as = 12xR2/(R1+R2) = 3 V

On solving the above equation we get a relation, R1=3xR2

Now use any value of resistance, in the above-mentioned ratio. Let us say, R1 = 30 Ohm, R2 = 10 ohm.

There will be infinite solutions. use any value.

Hope this will help. Please feel free to discuss.

Project 12V to 3V by Simply Using a Resistor

You can easily step down any DC supply by just using 2 resistors. The voltage divider is a basic and easiest circuit to step down any DC supply. In this article, we are going to make a simple circuit to step down 12v into 3v.

Material Requires

Breadboard x 1
12v battery x 1
1k ohm Resistor x 1
330-ohm resistor x 1
jumper wires
multimeter x 1

Schematic

A voltage divider is a simple circuit that turns a large voltage into a smaller one. Using just two series resistors and an input voltage, we can create an output voltage that is a fraction of the input. Voltage dividers are one of the most fundamental circuits in electronics. we can create any small voltage concerning the supply voltage by adjusting only one resistance.

Practical Approach

Our task is to step down 12v into 3v. so, we are going to use a 1k ohm resistor and a 330-ohm resistor.
Connect one end of the 1K ohm resistor to the 12v supply and the second to any other hole of the breadboard.
Frome same hole connects one end of 330-ohm resistance and another end to the ground.
Connect 12v supply
From the junction of both resistors connect one 3v LED.
To verify Connect the multimeter to the junction and measure the output voltage