BC547 NPN Transistor
BC547 is an NPN transistor hence the collector and emitter are going to be left available (Reverse suggestive) whenever the foundation pin is held at ground and will be shut (Forward biased) when a sign is provided to base pin. BC547 has a profit value of 110 to 800, this value determines the capacity of the transistor. The maximum amount of current that may flow through the Collector snare is 100mA, therefore we cannot connect. To bias a transistor, we must provide current to base pin, this current (IB) should be limited to 5mA.