DANCING LIGHT USING TRANSISTORS

INTRODUCTION OF DANCING LIGHT USING

TRANSISTORS

Hello viewers, in this tutorial we will learn about how to make a Dancing Light using transistors.

DANCING LIGHT can also call a LIGHT CHASER CIRCUIT. It is just for a fun circuit or can be used as a DJ Light for party and function and is composed of Transistor, Resistor, LED, Capacitor, Battery.

COMPONENTS REQUIRED

  • BC547 Transistor
  • Capacitor (10uf)
  • 47K Resistor
  • 470Ω Resistor
  • LED
  • 9 Volt Battery
  • Battery Clip
  • Bread Board

TRANSISTOR

The transistor is a semiconductor device that is basically of two types NPN and PNP. In PNP transistor, N-type semiconductor is sandwiched between two P-type semiconductors and an NPN transistor, P-type semiconductor is sandwiched between two N-type semiconductors. Transistors have three legs namely COLLECTOR, BASE, and EMITTER. Here in this circuit, we are using a BC547 transistor which is a very commonly used an NPN transistor.

You can use any type of NPN transistor such as BC548, BC549, etc. Its operation is very simple; whenever a current will be applied in its base then the barrier between the collector and the emitter gets decreased and charge starts flowing from collector to emitter by which both terminals get shorted internally.

CAPACITOR

The capacitor is an electronic device that stores charge in it. It contains two metallic plates separated by some distances and filled with dielectric. There are many types of capacitors available in the market. Some of them are Electrolytic, Polyester, Polystyrene, Ceramic Disc capacitors, etc. Every type of capacitor has different-different uses and purposes like ceramic disc capacitors are used for frequency setting and frequency matching, electrolytic is used for charge storage and as a filter circuit too, etc. Here in our case, we are using a 10uf capacitor.

RESISTOR

The resistor is an electronic device that opposes the flow of current through it. It has two terminals and there is no polarity so it can be operated in both forward and reverse direction. Its value is characterized by its color of 4 bands present on it. The value of resistance is calculated by color-coding. Here in our case, we are using a 47k and 470Ω resistor.

LED

LED stands for Light Emitting Diode. It is a normal p-n junction diode that emits light whenever a current is passed through it. Also available in the market in many different colors and of different power ratings. It has two terminals namely anode and cathode where longer one is the anode and the shorter one is the cathode. It is operated in forwarding biased direction. Its operating voltage is 1.5V.

BATTERY

The battery is a voltage source device that stores charge and energy. There are many different types of batteries of different-different types of voltage ratings that are available in the market such as 1.5V, 3.7V, 4V, 6V, 9V, 11.7V, 12V, etc. There are different types of batteries such as Lead-Acid battery, Lithium-Ion battery, Li-Po battery, etc. Here in our case, we are using a 9V battery.

BATTERY CLIP

Battery Clip is used to connect the battery from the circuit to the Bread Board. It has two wires in which Red one is +ve and Black one is –ve.

BREADBOARD

Bread Board is nothing but a trainer board that provides convenience to the hobbyists. In breadboard, you can build up any circuit without any soldering. The thing you need is just to plug and play. It has dotted bread-like pores in it in which you can insert the legs of any electronic components such as a resistor, transistor, diode, etc for the operation.

MECHANISM AND WORKING OF DANCING LIGHT USING TRANSISTORS

It’s an extremely simple circuit made with only Capacitors, Transistor, and LED. It’s a LED chaser circuit which by own explains that capacitors are playing the main role in the circuit by charging and discharging.

In other words, the transistor is switched by 47k resistor and LED starts glowing but the turn comes in the role when capacitor gets added to it, as the capacitors are connected from base to collector in the transistor so when the current comes to the transistor then it gets forwarded towards the capacitors and capacitors gets charged and shot the circuit (for one transistor) and shots till that time until it gets fully discharged and when it gets fully discharged then LED starts glowing until that time till then the capacitor gets charged once again and once the capacitor gets charged again then it again shots the circuit and LED goes off and this loop goes on for all transistor and this process of all transistors together forms a dancing effect or chasing effect.

The blinking speed or the delay of LED blinking can be controlled by changing the value of the capacitor. If you will increase the capacitance value of the capacitor then LED will dance slowly and if you will decrease the capacitance then it becomes fast.

CIRCUIT DIAGRAM OF DANCING LIGHT USING TRANSISTORS

WIRING AND CONNECTION OF DANCING LIGHT USING TRANSISTORS

STEP 1 OF DANCING LIGHT USING TRANSISTORS:

Connect battery clip to the Bread Board.

STEP 2A OF DANCING LIGHT USING TRANSISTORS:

Plug the entire 5 transistors into the breadboard and connect the emitter of all transistors to the ground.

STEP 2B OF DANCING LIGHT USING TRANSISTORS:

STEP 3A OF DANCING LIGHT USING TRANSISTORS:

Connect 47k resistor from +ve to the base of the transistor and do it for all the five transistors.

STEP 3B OF DANCING LIGHT USING TRANSISTORS:

 

STEP 4A OF DANCING LIGHT USING TRANSISTORS:

Connect 10uf capacitor from collector of the first transistor to the base of the second transistor and another 10uf capacitor from the collector of the second transistor to the base of the third transistor. Similarly, this continues so on.

 

STEP 4B OF DANCING LIGHT USING TRANSISTORS:

STEP 5 OF DANCING LIGHT USING TRANSISTORS:

Connect 10uf capacitor from collector to emitter of the last transistor. Therefore, the fifth transistor –ve leg will go to the emitter and then, +ve will go to a collector.

STEP 6A OF DANCING LIGHT USING TRANSISTORS:

Connect 10uf capacitors -ve leg to the base of the first transistor and +ve leg to the collector of the last transistor.

STEP 6B OF DANCING LIGHT USING TRANSISTORS:

STEP 7A OF DANCING LIGHT USING TRANSISTORS:

Now connect the LED’s –ve leg to the collector of the transistor and do this for all transistors.

STEP 7B OF DANCING LIGHT USING TRANSISTORS:

STEP 8A OF DANCING LIGHT USING TRANSISTORS:

Now connect the LED’s +ve leg to the resistor’s one end and connect the other end of the resistor to the +ve supply and do this for all.

STEP 8B OF DANCING LIGHT USING TRANSISTORS:

SAMPLE 1 OF DANCING LIGHT USING TRANSISTORS:

SAMPLE 2 OF DANCING LIGHT USING TRANSISTORS:

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Finally, you just made a Dancing light so gather your friends. For more instance, play cool music and dance with them.

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