Planning to build battery backup for raspberry pi zero w that last for days from 12v lead acid PC ups battery.
PC UPS 12v Lead acid battery->LM7805->Raspberry Pi zero micro usb.
Any chance for a problem while charging PC ups? Will it overload/overheat LM7805?
12v DC to 5v DC USB buck converter vs LM7805. Which one is better for pi zero?
Is it possible to use another LM7805 from the 12v battery parallel to run another raspberry pi zero?