I bought super cheap DC-DC converter on Amazon, but It was FAKE.

I bought DC/DC step-down converter modules on Amazon. LM2596 , a DC/DC converter IC sold by Texas Instruments (National Semiconductor), is used for the modules. At first I thought the IC was genuine, but I found out it's fake while experimenting with the modules. ◤Contents◢ 0:00 Opening Package and Introducing Product 1:08 Measuring Voltage 2:45 Checking Datasheet 4:17 Measuring Output Ripple Voltage 5:47 Fake ICs? 7:29 Measuring Efficiency and Temperature 8:34 Usability of Module Twitter: twitter.com/ichiken_make ■Business inquiries twitter.com/ichiken_make