12V to 24V Voltage Doubler Circuit

A 12V to 24V Voltage Doubler Circuit is shown below. When we need a high voltage DC supply from a low voltage input supply, we need this circuit. This circuit will help you if you have a 12V battery and require a 24V supply from it. You can utilize a Voltage Doubler circuit instead of implementing a new power supply source.

This circuit will generate a high-voltage DC supply from a low-voltage AC input.

Components Required

  • Step down Transformer 230V AC to 12V AC / 1 Amps
  • 1N4007 Bridge Rectifier module – 4
  • 2200µF Electrolytic Capacitor – 2
  • 4700µF Electrolytic Capacitor – 1
  • Connecting Wires

12V to 24V Voltage Doubler Circuit

Voltage Doubler Circuit

We used a bridge rectifier to convert a 12V AC feed from a step-down transformer to a DC source. The voltage is sent into a series of two 2200uF electrolytic capacitors. The output is then sent back into the 4700uF capacitor.

What is a Voltage Doubler?

A voltage doubler is an electrical circuit that generates a voltage output that is twice that of the input value. It’s a voltage multiplier with a factor of 2 for voltage multiplication. An oscillating AC input voltage, two capacitors, and two diodes make up the circuit. The input voltage is AC, and the output voltage is DC with a peak value double that of the input AC voltage. Voltage doublers can be used to replace heavy and expensive step-up transformers in some applications.

Working of the Circuit

The high-value electrolytic capacitor is charged and discharged by this Voltage Doubler to give high voltage. To begin creating the circuit, you must first determine the input and output voltages. The electrolytic capacitor’s value can then be calculated using the formulae below.

Vr = t*I/C 


Vr = ripple voltage

I = load current

t = half-period

Apart from that, there are plenty of additional ways to figure out the value of a voltage doubler circuit capacitor. The voltage doubler’s output will be 2Vin, which is twice the input voltage. Capacitors C1 and C2 charge during both positive and negative cycles, and then the discharging voltage cause C3 to charge above the DC supply input, resulting in a double voltage of 2Vin at the output load.

Circuit Simulation & Output

We simulated the circuit in Proteus and got the required result as shown in the screenshot below. The input voltage got doubled.

Voltage Doubler Simulation


I hope all of you understand how to design a simple 12V to 24V Voltage Doubler Circuit. We MATHA ELECTRONICS will be back soon with more informative blogs.

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