The 2SK3537-01MR, 2SK-3537, K3537, 3537 is a 150V 33A TO-220NIS Package N-Channel MOSFET, from FUJI Electric manufacturer is a IC Chips with N CHANNEL SILICON POWER MOSFET. More details for 2SK3537 can be seen below.
The LM2596 is a DC-DC Step Down or Buck Power Supply Module with Digital Voltage Display, the accuracy is adjustable function, can be aimed at your multimeter adjustable accurate. Press the right key to let the display show the input or output voltage.
The 2SK2837, 2SK-2837, K2837, 2837 is a 500V 20A N Channel Silicon Field Effect Transistor Or MOFET TO-3PN-3 Package. Chopper Regulator, DC−DC Converter and Motor Drive.