BJT Transistors Assortment Kit - Set of 210 PNP and NPN Assorted Transistors with 250 Assorted Resistors - Bipolar Transistor Pack with 2N3904 2N3906 S8050 2N2907 S8550 2N2222 BC337 C1815 BC327 A1015:
AUTONICS BEN10M-TDT NPN & PNP Output, Light & Dark ON, 12-24 VDC, Through Beam, Photo, Sensor: Electronic Component Photoelectric Sensors: Amazon.com: Industrial & Scientific
BOJACK 5 Pairs 2SA1943 2SC5200 Amplifier Transistor PNP NPN High Power Black Audio SiliconTransistor TO-3PL (Pack of 10 pcs): Amazon.com: Industrial & Scientific
Amazon.com: Digital Counter, Easy Connection NPN PNP Signal Input Stable Electric Counters Auto Detection for Industrial Control : Industrial & Scientific
Multifunction Meter DIY kit, ACEIRMC Mega 328 Graphic Transistor Tester, NPN PNP Diodes Triode Capacitor ESR SCR MOSFET Resistor Inductance LCD Display Checker with case: Amazon.com: Industrial & Scientific