To reduce the voltage from 5V DC to 3V DC you need to build a voltage divider circuit using resistor. From the resistor based circuit you can get the 3V DC supply without any voltage regulator IC or Buck converter, On ly the problem is the current compared to other method the current is very less.
Resistor Voltage Divider Circuit to Reduce 5V to 3V
The voltage divider consist of two resistors connected in series and R1 connected to the positive side and resistor R2 connected to the negative side of the 5V DC supply. From the middle point of R1 and R2 connected we takes the 3 V DC output. The connection diagram is given below,
Resistor Values and Input, output Voltage
- Resistor R1 = 200 ohms
- Resistor R2 = 330 ohms
- Input voltage = 5V DC
- output voltage = 3.1V DC
Voltage Divider Calculation for 5V to 3V
Formula Vout = Vin x R2/R1+R2
- Vout = 3V we need to get
- Vin is 5V DC
- R1 is 200 ohms and R2 is 330 ohms
Then the output voltage will be V out = 5 x 330/200+330
Vout = 3.1V
🧷 If you feel difficult in calculation you can use our free Voltage divider calculator tool
