EE here ordered LM2596LED, the device voltmeter and output voltage drops as load current increases. The problem is the feedback connection is not connected directly to the output pad (but instead is back where the inductor is). Output appears to have a 0.3 ohm drop which translates to 14.5V dropping to 14.2V when loaded with 1 amp (more current will have an even greater drop, the effect is linear).The meter appears to be accurate (19V in reported as 18.9V). FYI/instructions: pressing the button switches the meter between monitoring input or output. The meter display will change and the LED lit changes as well. The LED nearest the output will be on when you are monitoring the output voltage (and since this is a step-down regulator only, the meter will display the lower of the two numbers as well at this point). Also, as others have warned, the units appear to be dialed up to the MAX output voltage, which means whatever you put on the input roughly appears on the output. Recommend first connecting supply with NO LOAD and look at meter. Press the button to light the right-most LED (the one closest to the output of the board) then turn the trim-pot screw (top center part of the board) counter-clockwise until the voltage output on the display drops to what you want. It usually won't move at all until you have done several turns. Once set up correctly, you should then be able to attach your load.
4-Pack Unidapt US Plug Adapters - Convert EU, Europe, Japan, And Canada To American Power Outlets - Travel Plug Adapter For USA - Wall Plugs For Improved Accessibility And Convenience
11 Review
VINTAR EU To US Plug Adapter 3-Pack For Easy Travel: Europe To USA Converter For Spain, France, And More, Compatible With Type C/E/F Plugs - European To US Power Adapter Solution
11 Review
EXuby Digital Converter Box For TV With RF/Coaxial And RCA Cable For Recording And Viewing Full HD Digital Channels Free (Instant Or Scheduled Recording, 1080P HDTV, HDMI Output, 7 Day Program Guide)
12 Review
TV Tuner LUMAX DV-2120HD
15 Review
Premium Harman Kardon AVR-154 Home Theater Receiver - Discontinued by Manufacturer
11 Review
Experience Superior Sound Quality With SMSL Audio SAP-8 Headphone Amplifier In Black/Silver/Gold
5 Review
Amp Up Your Audio Experience With The Aimpire AD10 Mini USB DAC CSS XMOS XU208 ES9018K2M OPA2134 Audio Amplifier Decoder
10 Review
Portable Headphone Amp With 3.5Mm Stereo Audio Out, GAIN Support & Lithium Battery - Compatible With IPhone/Cellular Phone/MP3/MP4 /Computers.
27 Review