Icstation LM317 Digital Adjustable AC DC to DC Voltage Regulator Step Down Power Supply Buck Converter Module 3-30V to 1.25-20V

Icstation mini dc voltage regualtor module equipped with LM317 buck converter chip supporting DC3-30V and AC2.5-20V voltage input, DC1.25-20V voltage output. On-board potentiometer to regualtor output voltage and 3 digit LED display the output voltage easy to operation ideal for DIY low voltage DC power supply. Parameter: Buck Chip:LM317 Input Voltage: DC3-30V/ AC2.5-20V Adjustable Output Voltage: 1.25-25V Output Current(Max): 1.2A Output Voltage: DC1.25-20V Maximum output voltage = Vin - 3V Module Size: 63*40 mm / 2.48*1.57 inch (L*W) Typical Linear Adjust Rate: 0.0001 Typical Load Adjust Rate: 0.001 Ripple Wave Suppression Ratio: 80dB Work temperature: -25~85? Package Included: 1X LM317 Digital DC Voltage Regulator -----------------------------?? Warm Prompt ??----------------------------- 1. The output voltage must be lower than the input voltage at least 3V. 2. Do not consume too much power. General plus heat sink after the power consumption is not more than 10W. 3, We provide consultation service by email and replace service for free in case you received a defective one, please rest assured to buy it. 4, This module can not input 120V, max input voltage is 30V; supports AC & DC input, but only DC output. 5, Two blue terminals, one is input one, the other is output one. Regarding the - + marks are just reminding the positive and negative poles can not be reversed. 6, Please send us an email firstly instead of a review or feedback when you meet problems, because your order number can not be found timely in comments list, but your emails could be answer within 12 hours, always at your service!