The C945 is an age old Japanese Bipolar audio frequency NPN transistor 60V 150mA TO-92 package. It has a decent gain value (hfe) of maximum 700 and is highly linear. Hence it was widely used in amplifier.
The BC337 is an NPN transistor with a maximum gain of 630, commonly used in low power audio applications. It can also switch loads up to 45V and 800mA hence also used as general purpose transistor.
The ESP-01 Breakout Adapter for ESP8266 serial to Wi-Fi transceiver module. Since the ESP-01 pinout is not breadboard friendly and unlabeled, this makes it inconvenient for rapid prototyping.
The IRF540N is a 100V 30A To-220 Package Third generation power MOSFETs from Vishay provide the designer with the best combination of fast switching, ruggedized device design, low on-resistance and cost-effectiveness.
The 2N3906 Is 40V 200mA 625mW PNP Bipolar Transistor is designed for use in linear and switching applications. The device is housed in the TO-92 package, which is designed for medium power applications
The IRFP054 is a 55V 80A 240W Third generation Power MOSFETs from Vishay provide the designer with the best combination of fast switching, ruggedized device design, low on-resistance and cost-effectiveness.
The HA17555 is a designed for accurate time delays or oscillations. It provides both of trigger terminal and reset terminal in order to enable a wide scope of application including Mono Multi Vibrator and Astable Multi Vibrator.
The 2SC9014 2SC-9014 2SC 9014 C9014 is a NPN 50V 0.1A 0.6W 270MHz Transistor TO-92 Package Bipolar NPN Small Signal Transistor Electrical Circuitry and Parts