Batteries are required for operation of any and all small electronic devices. In order to function properly, several of them require battery voltages that are higher than the typical level. In the event that the battery with that particular voltage is not accessible, we will have no choice but to connect additional cells in series in order to

raise the DC voltage. As a result, the true significance of the term "miniaturization" is lost. If the device in question is able to function with a low amount of current, using a voltage doubler is a straightforward method that can be utilized to solve this issue. In this article, we will discuss a low power voltage doubler circuit that is easily adaptable for use with electronic devices that require a voltage that is higher than that of a conventional battery but only requires a little amount of operational current to function. The circuit is not very complicated because there are not many components in it. Despite this, the efficiency of the output is between 75% and 85% across the whole operating voltage range. At the end of the circuit, the voltage supplied by the battery has almost been increased by a factor of two. Voltage doubler circuit In this configuration, IC1 is wired as an astable multivibrator in order to produce rectangular pulses at a frequency of around 10 kHz. This frequency of the pulses, as well as their duty cycle, can be altered by utilizing preset VR1. The pulses are fed into the switching transistors T1 and T2 in order to drive the output section, which is set up as a circuit that doubles the voltage. The voltage across capacitor C5 has been increased by a factor of two. Circuit operation

The high-level causes transistor T1 to reach its saturation throughout each cycle of the pulse's occurrence, which prevents transistor T2 from turning on. Therefore, transistor T1 charges capacitor C4 to a voltage level that is somewhat lower than the supply voltage via the path provided by diodes D2 and D1 in the circuit. Nevertheless, when the pulse is at its lowest point, the transistor T1 is turned off while the transistor T2 is forced into saturation. Now, transistor T2 adds one more increment of charge to the capacitor C4's negative pole, bringing it up to a level that is equal to the supply voltage. As a result, capacitor C5 receives an equal amount of charging through diode D3, which causes it to charge up. Because of this operation, the total voltage across capacitor C5 is increased to almost exactly twice as much as the input voltage. If the output of the pulse generator is maintained with an amplitude and frequency that are sufficiently high, then the output voltage and current will remain constant and will be tailored to meet the requirements of the load. This circuit almost completely lacks ripple voltage, and that is despite the presence of the half-wave function. The efficiency can be estimated to be in the upper 90 percent levels if the connected load does not require a large current. Because the input voltage is increased by a factor of two, the amount of current drawn from the input power source is also increased by a factor of two at the input but decreased by a factor of two at the output.

It is important to keep in mind that the output of the multivibrator could be negatively affected by the interference that is imposed on the DC voltage if the frequency of the multivibrator is rather high. In this scenario, the frequency needs to be adjusted in a way that is satisfactory through a process of trials and actual load connection. On the multi-purpose PCB, this teeny-tiny circuit can be constructed. If all of the components in the module are of the surface-mount kind, then the module as a whole can be shrunk down to a more manageable size.