Small appliances have microcomputer that requires 5V power supply. Why it can use only 1.5V battery? The 1.5V to 5V boost converter circuit inside them.
This is simple the 12V to 24V step up converter circuit, can convert DCV from 12V to 24V at 1A max. Using TDA2004. Why is amplifier IC? It easy&inexpensive.
It is a ideal for small size circuit and easy. It is a switching voltage regulator circuit. 5V USB to 12V output low current such as LED display. LEarn It moRe!
Simple DC converter circuit that convert voltage as inverter from input +5V to Dual output voltage +5V and -5V at Input Voltage 1.5-10V