Light-emitting diodes (2749) Optical couplers (2112) LED digital tubes (144) LED display modules (109) Infrared transmitters (103) Ambient light sensors (58) Optical sensors (52) Gate drivers (29) SCR (12) Isolation ICs (8) Backplane connectors (6) Solid State Relays (4) Photoelectric switches (3) TVS diodes (transient voltage suppression diodes) (2) Amplifiers (2) Screwdriver/tweezers/wrench tools (2) Linear voltage regulator ICs LDO (2) Infrared receivers (2) Connector accessory kits (1) LED light guide tube accessories (1) Laser device accessories (1)