DC-DC Buck-Boost Module 2.5V-15V to 3.3V/3.7V/4.2V/5V/9V/12V

$4.86

ATX Power Supply Adapter Board with Output Terminal Block

$8.54

Switching Power Supply Board 12V 2A 220V to 12V Isolated

$10.40

DC-DC Step-Down Module 3A Adjustable Voltage Regulator

$1.70

5S 21V Lithium Battery Protection Board for Makita-Style Power Tools

$8.60

DC-DC Step-Down Module 24V to 12V Adjustable Voltage Regulator for RC Models

$2.87

Power Module 220V to 12V 5V 24V Waterproof

$9.90

4-Cell 18650 Battery Box Weld-Free Holder

$9.35

DC Power Module 12V to 3.3V 5V 12V Multi-Output

$3.80

Voltage Regulator Module Adjustable DC 3.3V/5V for Smart Cars

$9.36

Electric Fly Swatter Circuit Board Module 3.7V to 4000V High Power

$6.00

DC-DC Isolated Power Module 5V to 5V B0505S-1WR2

$2.35