I'm trying to design a battery back-up power supply for my home network devices. I need these:
- 48 V / 40 A
- 24 V / 10 A
- 12 V / 2.5 A
- 5 V / 5 A
I got a 48 V / 60 A industrial power supply with battery backup (four 12 V car batteries in series) and need to divide the voltages.
After digging through Google and Electrical Engineering Stack Exchange, I want to use bunch of diodes (like 1N4007, but of type able to withstand the current) and simply take out needed voltages somewhere between these like this:
The second option are high current transistors like BC547B driven by zener diodes, but I'm not really sure if that would be better than the first option. Is my idea OK, or I should do it another way?