Electronics project

 The IC LM7809 is used for the regulated power supply of 9 volt.  By giving 12v to 35v on its input pin number 1, a regulated power supply of its output pin numbers 3 to 9v is obtained.  Its output can deliver loads up to 1.5mA on pin no.3.  The pinout of the IC LM7809 is shown in the below circuit. ic lm7809 voltage regulator pinout 

                 BC547 NPN Bipolar Junction Transistor -------------------------------------------------------------------- General Description: ------------------- The BC547 is a popular NPN bipolar junction transistor commonly used in amplifier and switching applications. It is designed for low to medium power amplification and switching tasks. Features: --------- - NPN silicon transistor - Low voltage (up to 45V) and current (up to 100mA) ratings - High current gain (hFE) of 110 to 800 - TO-92 plastic package for easy mounting Pinout: -------   Emitter (E)       Collector (C)       Base (B)     |----------------|------------------|      Absolute Maximum Ratings: ------------------------- Parameter              Symbol      Value ---------------------------------------- Collector-Base Voltage  V_CBO       50V Collector-Emitter Voltage V_CEO      45V Emitter-Base Voltage    V_EBO       6V Collector Current       I_C       

BC548 NPN Transistor data sheet and pinout Features: NPN silicon transistor. High current gain (hFE) of typically 110-800. Low collector-emitter saturation voltage. Low noise and low power. Absolute Maximum Ratings: Collector-Base Voltage (VCBO): 30V Collector-Emitter Voltage (VCEO): 30V Emitter-Base Voltage (VEBO): 5V Collector Current (IC): 100mA Total Device Dissipation (PD): 500mW Junction Temperature (TJ): 150°C Storage Temperature Range (TSTG): -65 to 150°C Electrical Characteristics (TA = 25°C unless otherwise specified): Package Information: The BC548 transistor is available