AIRSUNNY three Legs 5 pairs Infrared Diode LED IR Emission and Receiver

MagicW Digital 38khz Ir Receiver 38khz Ir Transmitter Sensor Module Kit for Arduino Compatible

Gikfun 5mm 940nm LEDs Infrared Emitter and IR Receiver Diode for Arduino (Pack of 20pcs) EK8443

Adafruit Super-bright 5mm IR LED (25 pack) [ADA388]

MakerFocus 2pcs ESP8266 NodeMCU LUA CP2102 ESP-12E Internet WiFi Development Board Serial Wireless Module Internet for Arduino IDE/Micropython with Free Adapter Board for ESP8266 ESP-01 and nRF24L01+

HiLetgo 2pcs ESP8266 NodeMCU LUA CP2102 ESP-12E Internet WiFi Development Board Open Source Serial Wireless Module Works Great with Arduino IDE/Micropython (Pack of 2PCS)

eBoot 30 Pieces Photoresistor Photo Light Sensitive Resistor Light Dependent Resistor 5 mm GM5539 5539

Cylewet 30Pcs 5mm 940nm LEDs Infrared Emitter and IR Receiver Diode for Arduino (Pack of 30) CYT1057

(200 Pcs) McIgIcM 2N2222 Transistor, 2N2222A to-92 Transistor NPN 40V 600mA 300MHz 625mW Through Hole

100 x 2N2222 NPN TO-92 Plastic-Encapsulate Power Transistors 75V 600mA

Adafruit NPN Bipolar Transistors (PN2222) - 10 pack [ADA756]