Voltage Doubler Circuit

Voltage Doubler Circuit

Summary

The circuit describes below is used to double the input DC power given.This circuit is useful when you require higher voltage level from a single lower voltage power supply.

Description

This circuit is based on 555 timer wired in astable mode means it will produce a square wave at a frequency of 2KHz approx.with the help of components R1,R2 and C1.When input power is supplied to the circuit we get the output on pin 3 of IC1.

Here C3 and D2 are connected in forward bias and used to amplify the signals and diode D1 is used to protect the C3 from complete discharge. The following capacitor C4 is therefore charge with a combined voltage from C3 and power supply. Therefore in this circuit components C3,C4,D1,D2 are used to boast the input power given.

In this circuit we can change the value of capacitor C3,C4 as we increase the value charging and discharging time also increases and we have to wait for output means output will increase slowly and if we reduce the value reverse action will take place but keep in mind do not reduce the value of C3 so much that it may become hot. In this if you do not use C4 than you will get approx. 2 Volts less in output.  

Note we can supply the input voltage from 3V- 12V not more this if we exceed the limit it will destroy the NE555 IC.We can also use 1N4148 diode in place of 1N4007 but output voltage will decrease because  breakdown voltage point of both diode differ.

Components used

IC
IC1(NE555)	1
Resistor
R1(10K)	1
R2(33K)	1
Capacitor
C1,C2(.1uF)	2
C3(47uF)	1
C4,C5(470uF)	2
Miscellaneous
D1,D2(1N4007)	2
Battery	1