The HW-483 is DC5V 6mm 650nm Red Color Laser Diode Module For Arduino Very Easy To Use, Do controllable laser pointer, theft detection, etc. interesting application devices.
The 2SK3515, 2SK-3515, K3515, 3515 is a 450V, 10A, 48W TO-220NIS Package MOSFET, The FUJI Electric manufacturer is a IC Chips with N CHANNEL SILICON POWER MOSFET for more details of 2SK3515 can be seen below.