shunt regulator

I made a low battery cutoff circuit to monitor my 12v lead acid battery using TL431. I followed the circuit diagram shown below. Sorry for the hand-drawn schematic. I am however not satisfied with the outcome, since I understood with my little knowledge of TL431 that it would work better than a...

I am trying to make a regulator that will regulate its input voltage rather than its output voltage. I am using a LDO to work out the kinks in the control logic and keep the diagram simple. I want to get this working on a buck regulator eventually. Use input voltage and link it to the adjust...

Hello everybody. I am trying to increase my power Supply's default 12V 3.3A output to something like 20V 3A. I Decided to use a potential resistor via the shunt regulator at the opto-coupler which i was sure it had. But the problem is that when i opened the power supply, most of the output...