I am trying to build a variable power supply using a transformer with a 12V 0 12V - 5 ampere output. I am using a BR1010 rectifier. I have connected the 2 - 12V wires from the transformer to the AC input of rectifier. At the output of the rectifier I have connected 2 - 25V 2200uF capacitors in series. The output I am getting through the capacitor is 40V. How is this voltage increasing?
I want to pass this into a XL4015 step down module so that I can control the voltage in a more proper manner but the input range for this module seems to be maximum 36V.
What can be done in this case? Am I doing something wrong? Any help is appreciated. I am posting few pics of my circuit.
Yellow wire is 12V-12V output from the transformer that is connected to input of the BR1010. The red and black wires are connected to the capacitor in series (2*25V). PS: Ignore the red wire to the XL4015 module.