XY-MUP DC DC USB Step UP / Down 5v to 3.3v 9v 12v 24v Power Supply Module Adjustable Boost Buck Converter Voltage Regulators - AliExpress
Boost Power Supply Module DCDC Voltage Regulator Converter 5V To 3.3V 9V 12V | eBay
Amazon.com: 2Pcs Mini AC/DC to DC Buck Step Down Converter AC 5-30V DC 5V-48V 24V 36V 48V to DC 3.3V-33V 12V Adjustable Voltage Regulator Power Supply Board 2A Volt Converter Module :
4CH 3A 3.3V 5V 12V ADJ DC DC Voltage Converter Switch Power Supply DIN Rail | eBay
DC-DC 6V-12V to Dual Output 3.3V and 5V @ 800mA each [6080] : Sunrom Electronics
Amazon.com: HiLetgo 2pcs Micro USB Power Breakout USB Voltage Regulator DC to DC Power Module Micro USB Power 5V to 1.8V/3.3V/5V/9V/12V : Electronics
Arduino Power Supply Shield With 3.3v, 5v and 12v Output Options (Part-1) : 6 Steps - Instructables
6USB Adapter Board With IR Detection ATX Multiple Power Supply Adapter Compatible 20Pin and 24Pin Power Supply Available - AliExpress
SSR - solid state relay AC Switch for microcontrollers , 3.3V~12V logic, AC 220V/5A (peak 10A) - AliExpress
1/2/5/10/20Pcs DC-DC USB Buck-Boost Power Regulator Module 5V to 3.3V 9V 12V 24V Desktop Power Module PER Display Output - AliExpress
DC-DC 5V to 3.3V 9V 12V 24V USB Buck Boost Power Supply Voltage Regulator Module Desktop Power Module at Rs 340.00 | DC-DC Converter, Direct Current To Direct Current Converters, डीसी से