Cheap And Discounts LM2596S-ADJ 3-40V DC-DC adjustable step-down Voltage regulator power supply MODULE BOARD 3A Buck Converter LM2596s LM2596 Wholesale. Buy Directly From Merchant Rinzison Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.