(Power (3-40V), power indicator light, the module is working properly. Can't booster). Output Current :3A( Max).
eBay
LM2596 DC-DC 3A Adjustable Step-down Module LM2596 Constant Current Voltage Regulator High Efficiency Low Heat
Aliexpress UK
1 LM2596 Step Down Module. Model Number: Converter. We'd like to settle any problem in a friendly manner. Output current: 3A (maximum). Output ripple:<30MV. It's just take you 1 minute.
eBay
Efficient Adjustable 5A DC-DC Buck Module Constant Current Voltage Regulator Step Down Converter Charging Board 5V 12V 24V
Aliexpress UK
(Could not boost). DC-DC step-down power module. Also note that monitor settings may vary from computer to computer and may distort actual colors. IN-IN + input Positive Input Negative! Output current 3A (max).
eBay
AC-DC 5V 700mA 3.5W Isolated Switching Power Supply Module Buck Regulator Step Down Precision Power Module 220V to 5V Converter
Aliexpress UK
Module Properties: Non-isolated step-down module (buck). Output current: rated current 2A, maximum 3A (need to add heat sink). Power converter. Full load temperature rise: 40 C. Load regulation: ± 0.5%.
eBay
DC15V-100V to 12V 1A-10A Step Down DC DC Converter Regulator Module Voltage Regulator Buck Car Truck Boat Power Supply Adapter
Aliexpress UK
eBay
RD6024 RD6018 60V 24A WiFi/USB DC Adjustable Step Down Voltage Bench Color Display Data Storage DIY Power Supply Buck Converter
Aliexpress UK
Indicator: CC indicator is Red, charging indicator is Red, charging completed the indicator is Blue. Output short circuit protection: Yes, constant current. Full load temperature rise: 45 ℃. Output: OUT+ output is positive, OUT- output negative.
eBay
DC 11-22V 12V To 9V 2A 18W Step Down Voltage Converter 12Volts Regulator Buck Output Power Supply Module Adapter for Truck Car
Aliexpress UK
C3, C4 are output filter capacitors. R2 and LED2 form the indication circuit. If the brightness is too high, the resistance of R2 can be increased correctly. L1 is a special inductor used as an energy converter.
eBay
12V to 5V 2A 3A 10W 15W 24W DC-DC Step Down Buck Converter Power Supply Module Mini USB Micro USB Male Female Type-C Adapter
Aliexpress UK
(Could not boost). DC-DC step-down power module. Also note that monitor settings may vary from computer to computer and may distort actual colors. IN-IN + input Positive Input Negative! Output current 3A (max).
eBay
GYVRM 8-40V to 5V 1A 2A 3A 4A 5A Step-down DC DC Converter 12V 24V 36V to 5V 25W Buck Module Power Supply for Car LED
Aliexpress UK