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

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

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

Pixnor 1120pcs 56 Values 14W 0.25W 1% Metal Film Resistors Assorted Kit Set (1ohm-10Mohm)

DTOL 10 x Mini Laser Dot Diode Module Head WL Red 650NM 6mm 5V 5Mw Pack of 10

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+

microtivity IL188 5mm Assorted Clear LED w/Resistors (8 Colors, Pack of 80)

Gikfun NE555 DIP-8 Single Bipolar Timers IC for Arduino (Pack of 50pcs) EK2129

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

E-Projects EPC-103 16 Value Resistor Kit, 10 Ohm - 1M Ohm (Pack of 400)

ELEGOO 17 Values 1% Resistor Kit Assortment, 0 Ohm-1M Ohm (Pack of 525) RoHS Compliant for Arduino, Respberry Pi Projects