If you have a low voltage transformer and need to squeeze twice as much out of it, then there is no problem. Only 4 elements are needed to rectify the output voltage from it and at the same time double it. The scheme is as old as time, but many do not know about it.
Will need
- Two 4007 diodes.
- Two capacitors 2200 uF 25 V.
Making a Voltage Doubler
We solder the capacitors in series to each other: plus to minus.
We also solder the diodes in series to each other: anode to cathode. And we solder these two pairs parallel to each other.
Schematically it all looks like this:
We connect our doubler to the transformer.
The value of the alternating voltage from which is approximately 11.5 V. And from the output of the doubler there is already approximately 30 V of direct voltage.
For those who do not understand how 11.5 V turned into 30, I’ll explain: 11.5 V is an alternating voltage that is measured by the root mean square value. After rectification it is approximately 14.4 V. And after doubling it is approximately 29-30 V, taking into account the measurement error and the absence of load.
When using this circuit, also keep in mind that the current to the transformer also doubles. And if the load consumes approximately 0.2 Amperes, the current on the low-voltage winding of the transformer will be 0.4 Amps.
