LM2596 DC Buck Step Down Power Converter Module DC DC 4.0~40V to 1.25-37V 2A with LED Voltmeter?2pcs?

Application: This module can be applied to fields in the input voltage is higher than the step-down output voltage, such as batteries, power transformers, DIY adjustable power supply, 24V Car T of the power equipment industry buck, 12V switch 3.3V, 12V switch 5V, 24V switch 5V, 24V switch 12V, 36V 24V turn and so on. Parameters: Product size: 66mm * 36mm* 14mm (l x w x h) Colours:Blue Package Weight: :23g/pcs Materials: FR4 + electronic components Name: LM2596ADJ DC - DC Step-down power Module ( Step Down Adjustable With Digital Display Screen) Note: 1.When the module output voltage can not be adjusted, the output voltage is always equal to the input voltage.Please adjust the potentiometer counterclockwise 20 laps or more. (Let potentiometer against your chest, counterclockwise turn boost) . 2. Input voltage must be higher than the output voltage of 1.5v or more 3. high current or high power needed to enhance heat dissipation