Introduction: Clapping Switch With BC547 Transistor
Today I am going to make a circuit of Clapping switch with BC547 Transistor.In Earlier We made clapping switch using LM555 IC.
Let's get started,
Step 1: Take All Components As Shown Below
Components required -
(1.) Transistor - BC547 x1
(2.) Microphone x1
(3.) Capacitor - 25V 47uf x1
(4.) Resistor - 1M x1
(5.) Resistor - 10K x1
(6.) Resistor - 120K x1
(7.) Battery - 9V
(8.) Battery clipper
(9.) LED - 3V x1
(10.) Resistor - 220 ohm x1
Step 2: Transistor - BC547
C - Collector
B - Base and
E - Emmiter
Step 3: Circuit Diagram
This is the circuit diagram of this project.
Connect all components according to this circuit diagram.
Step 4: Connect Both Transistors
Firstly we have to connect both transistors.
Solder Collector Pin of transistor-1 to Base pin of transistor-2 as solder in the picture.
Step 5: Connect 47uf Capacitor
Next we have to connect 47uf capacitor.
Solder -ve pin of capacitor to base pin of transistor-1.
Step 6: Connect Emmiter Pin of Both Transistor
Next Solder emmiter pin of transistor-1 to transistor-2 as solder in the picture.
Step 7: Connect 10K Resistor
Solder 10K Resistor to +ve pin of capacitor.
Step 8: Connect 1M Resistor
Next solder 1M Resistor to base pin of transistor-1.
Step 9: Connect 120K Resistor
Solder 120K Resistor to collector pin of transistor-1 as solder in the picture.
Step 10: Connect 220 Ohm Resistor
Solder 220 ohm resistor to -ve leg of LED.
Step 11: Connect LED to Circuit
Solder 220 ohm resistor which is connected to -ve leg of LED to the Collector Pin of Transistor-2 as solder in the picture.
Step 12: Connect +ve Leg of LED
Solder +ve leg of LED to 10K,1M and 120K resistor as you can see in the picture.
Step 13: Connect MIC
Solder +ve wire of MIC to +ve pin of Capacitor and
solder -ve wire to emmiter pin of Transistors as you can see in the picture.
Step 14: Connect Battery Clipper Wire
Now we have to connect battery clipper wire to the circuit.
Solder +ve wire of battery clipper to +ve leg of LED and
solder -ve wire of battery clipper to Emmiter pin of transistors as you can see in the picture.
And Connect Battery to battery clipper.
To activate LED Do Clap.
Question 1 year ago
LED keeps glowing the whole time even if mic is not connected
Question 1 year ago on Step 3
Can you tell me the operation principle of this circuit please
Question 2 years ago on Step 3
Hey there! What minimum voltage is required to bias a condenser mic?
Answer 2 years ago
As an LED is involved with a transistor and a 220 ohm resistance in series, at least 5 volt must be given. Well to have better operation with the resistance values, I think 9 volt supply, as suggested in the circuit, is reasonable.
2 years ago
This is simple yet useful circuit. Simply by looking at the circuit, neurons release to start assembling it. However, it would have been great if the theory and physics of the working of toggle activity of each transistor of the circuit would have been explained. Wish to get a response, if any, of the author of the post. -:) . Regards and Thanks in advance.