The second application is a simple fire detector. 2.)bc547 transistor project- Simple fire detection system: The circuit will amplify the voice input fed by the condenser mic. Here we have placed a MIC in place of the AUX jack. The amplification of the input signal from MIC:
In this way, it converts Electric energy into the audio output. Due to this larger current from the 9v battery? passes thought the speaker.
We are applying a voltage at its base from the audio input signal by AUX cable. In this circuit, the transistor allows a larger current to flow when we apply smaller voltage at its base. It is used as a filter to block out the DC component of the input signal. Here the capacitor C1 is a coupling capacitor. This is the simplest circuit for amplifier The Circuit diagram for the amplifier of the AUX output of the Mobile Phone is as shown: We have used this amplifier circuit for amplifying the AUX output of a Mobile phone or mic. In this project, we will make a Simple audio amplifier Circuit using BC547 NPN transistor. There are many types of amplifiers available in the market, but you can make an amplifier using very little components and money. It is widely used in the electronic industry. However, this never works properly and output is not good.Īn amplifier is an electronic circuit or device which is used for amplification and switching purpose. Here are top 5 bc547 transistor project: bc547 transistor project no 1īc547 transistor (an NPN bipolar junction transistor(BJT)) can be used for audio amplification. To use Bjt as an amplifier, emitter-base junction is forward biased whereas the collector-base junction is reverse biased. When the input voltage is applied at emitter and base terminal, some amount of current starts to flow from base to the emitter which controls the current at the collector terminal. The inputted signal is amplified at the base and then gets transferred to the emitter. It is best operated in the active region.īC547 is biased in such a way that it is partially on for all the applied inputs. For proper operation of the transistor, A fixed DC voltage is required. Supplying a proper DC voltage to the transistor is known as the biasing of transistor.
The maximum current gain of this transistor is around 800. The current flowing from base to the emitter controls the current flowing through the collector.īC547 is usually used for amplification and switching purposes. In transistors, a small amount of current at the base terminal controls a larger amount of current at the emitter and collector.īC547 has three terminals as in other transistors. The use of a transistor is to transfer the resistance. The word transistor means of two words, transfer and resistor. It is widely used for power amplification and switching. Bc-547 is an NPN bipolar junction transistor(BJT). Here are the Top 5 DIY bc547 transistor project for you.
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