Review on 🔌 High Power Boost Buck Converter, DROK DC 5.5-30V to 0.5-30V 5V 12V 24V Adjustable Power Supply Regulator Module, 4A 35W Voltage Step Up Down Converter Board with Case and LCD Display by Corey Ford

Do you have several old laptop or phone charger adapters, but none of them are right for your voltage or plug project? That is the answer. You can use a 9 volt power supply rated at 1 amp and get 12 volts, but with a little less current. Or a larger 20VDC 4A laptop power adapter and adjust the voltage and current to suit your project needs. These newer devices have plastic cases, so the problem with us hobbyists is that we have pieces of wire, screwdrivers, metal objects of all kinds on our workbench. Install an unprotected device DROK and BUF on them! So now they have insulating covers so that we who focus on problem finders can't accidentally damage our power supply. I have several of these. I even use them for specific purposes in our five-wheel motorhome.