D-Planet [8-Pack] LM2596 DC-DC Adjustable Buck Converter 3-40 V to 1.5-35v Step Down Power Supply High Efficiency Voltage Regulator Module …

Key features

• Input voltage range： DC 3 -40 V (input voltage must be 1.5 V higher than the output voltage, no boost)
• Output voltage range：Output: DC 1.5 - 35 V voltage is continuously adjustable, maximum output current is 3 A
• 8 pieces of LM2596 board and heat sinks included
• Easy to make it work and convenient to accurately adjust the output voltage with a mini screwdriver.
• 100% SATISFICATION SERVICE: If there are any problem with our products, please feel free to contact us. you can request a refund for any single module and no need to return it.; Any problems you can contact us and we will try our best to resolve it till you satisfied.（Note：The factory have tested these at max voltage so they are very high by default, takes about 15-20 turns CCW before the voltage starts ramping down)