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BC 547 NPN Transistor

BC547 is a NPN transistor hence the collector and emitter will be left open (Reverse biased) when the base pin is held at ground and will be closed (Forward biased) when a signal is provided to base pin. BC547 has a gain value of 110 to 800, this value determines the amplification capacity of the transistor. The maximum amount of current that could flow through the Collector pin is 100mA, hence we cannot connect loads that consume more than 100mA using this transistor. To bias a transistor we have to supply current to base pin, this current (IB) should be limited to 5mA.

 

When this transistor is fully biased then it can allow a maximum of 100mA to flow across the collector and emitter. This stage is called Saturation Region and the typical voltage allowed across the Collector-Emitter (V­CE) or Base-Emitter (VBE) could be 200 and 900 mV respectively. When base current is removed the transistor becomes fully off, this stage is called as the Cut-off Region and the Base Emitter voltage could be around 660 mV.

 

BC547 as Switch

When a transistor is used as a switch it is operated in the Saturation and Cut-Off Region as explained above. As discussed a transistor will act as an Open switch during Forward Bias and as a Closed switch during Reverse Bias, this biasing can be achieved by supplying the required amount of current to the base pin. As mentioned the biasing current should maximum of 5mA. Anything more than 5mA will kill the Transistor; hence a resistor is always added in series with base pin. The value of this resistor (RB) can be calculated using below formulae.

RB  = VBE / IB

Where, the value of VBE should be 5V for BC547 and the Base current (IB depends on the Collector current (IC). The value of IB should not exceed mA.

BC547 as Amplifier

A Transistors acts as an Amplifier when operating in Active Region. It can amplify power, voltage and current at different configurations.

Some of the configurations used in amplifier circuits are

  1. Common emitter amplifier
  2. Common collector amplifier
  3. Common base amplifier

Of the above types common emitter type is the popular and mostly used configuration. When uses as an Amplifier the DC current gain of the Transistor can be calculated by using the below formulae

DC Current Gain = Collector Current (IC) / Base Current (IB)

Applications

  • Driver Modules like Relay Driver, LED driver etc..
  • Amplifier modules like Audio amplifiers, signal Amplifier etc..
  •  Darlington pair

Pin Number

Pin Name

Description

1

Collector

Current flows in through collector

2

Base

Controls the biasing of transistor

3

Emitter

Current Drains out through emitter

0.250 KWD Add to cart

RGB Strip Roll 5 meters (WS2812B IP67)

Individually Addressable Dream full color Programmable  WS2812B Great LED Strip,White PCB ,silicone sleeve,came with convenient couple of extra JST-SM 3pin connectors. Works great with EBOT and  Arduino. ALso it  is easy to program, as the addressable WS2812B  Can be cut each 5050SMD individually, and will works great without damage ,.

Need only 5v, can work on USB power.Fully IP68 waterproof silicone sleeve with JST- SM connectors on both ends for easy installation,Each pixel is on a separate PCB, which allows you to cut up the strips into smaller segments if required for your installation..

Addressable LEDs allow each individual LED to have a distinct color & brightness to every other LED. It allows you to display most anything on an LED strip that can be displayed on this screen! Full color video, signs, complex chase patterns, persistence of vision projects.

 

The price is only Led Strip, Not Included Power Supply or Led Controller!

WS2812B Must Use DC5V Power Supply.

Every 0.5meter with solder joints,

 

10.00 KWD Outof Stock

Heat shrink tubes -5 cm length and 3 mm diameter -10Nos

Heat shrink tubing is a type of extruded plastic tubing that can be cut to size and fitted over a wire or cable joint to protect and insulate the connection. When heated is applied the tubing shrinks permanently providing a protective seal. The amount it shrinks depends on its shrink ratio. When you buy the tubing it is in its expanded state, this expanded tubing has memory so when it is heated it returns to its original state. Larger shrink ratios are required to cover materials with a greater size variation.

 

high quality, easy to use general purpose heat shrink tubing made from flexible, flame retardant Polyolefin. This heat shrinkable tubing has a low shrink temperature of just 70°C (minimum) and a high shrink ratio of 3:1 which means it shrinks to a third of its original diameter and is ideal for covering irregular or awkward shapes

 

Set of 10 no. of 3 mm diameter Black Heat shrink tubes.

Length 5 cm

0.200 KWD Add to cart

Heat shrink tubes -5 cm length and 2.5mm diameter -10Nos

Heat shrink tubing is a type of extruded plastic tubing that can be cut to size and fitted over a wire or cable joint to protect and insulate the connection. When heated is applied the tubing shrinks permanently providing a protective seal. The amount it shrinks depends on its shrink ratio. When you buy the tubing it is in its expanded state, this expanded tubing has memory so when it is heated it returns to its original state. Larger shrink ratios are required to cover materials with a greater size variation.

 

high quality, easy to use general purpose heat shrink tubing made from flexible, flame retardant Polyolefin. This heat shrinkable tubing has a low shrink temperature of just 70°C (minimum) and a high shrink ratio of 3:1 which means it shrinks to a third of its original diameter and is ideal for covering irregular or awkward shapes

 

Set of 10 no. of 2.5 mm diameter Black Heat shrink tubes.

Length 5 cm

0.200 KWD Add to cart