LED Strobe Light Circuit | Using 555 Timer | DIY | How to | Homemade | Step by Step

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Hi Today Instructable is very simple and easy to build DIY LED Strobe Light Driver Circuit
A Complete Step By Step Video Tutorial is also given in the video below.

In this project let us develop an LED Strobe light circuit using the popular 555 timer IC. A strobe light or a stroboscopic lamp is one which can produce regular flashes of light. We are designing this circuit using a 555 timer for setting the delay between each flash and a high power LED light as the source of light. At the end of this project we will learn how to use 555 timers in mono stable mode and how to calculate the delay for such a circuit.

Step 1: Hardware Required

The components required for this project is listed below

  • 555 Timer
  • High Power LED
  • 10k Resistor
  • 0.01uF,0.1uF Capacitor
  • 10M Potentiometer (or 1M, 2M Resistors)
  • Breadboard
  • Connecting Wires
  • 9V Battery

Step 2: Circuit Diagram

The complete circuit diagram is shown in the above image. You can either build them on a breadboard or solder them to a Perf Board. The explanation of the circuit is given below.

Circuit Explanation:

The heart of the strobe light circuit is the 555 Timer which is operating in Monostable mode. The 555 Timer can operate in 3 different modes such as Astable, Monostable and Bistable mode. All these three modes produce three different types of pulses which can controlled at a particular point. The Monostable mode produces pulses whose high state time can be set by giving a trigger at pin 2. The output(pin 3) of the 555 IC normally stays low, whenever the pin 2 is triggered the pin 3 will go high for a specific interval of time.

This delay can be controlled by changing the values of Resistor (Potentiometer) and the capacitor (C2) shown in the circuit. The formulae to calculate the delay is shown below


Where, resistance R is in ohms, Capacitance C is in Farads and Time is in seconds. I have used the resistor value as 1M ohm and capacitor value as 0.1uF to produce a delay of about 0.1 second. You can change the delay by varying the potentiometer.

Step 3: Working

Once the connections are given simply power the circuit using a 9V battery. You should notice your LED flashing. If it looks stable, it means that it is flashing so fast that it is not visible to the naked eye. So gradually adjust the potentiometer to vary how fast it should flash. You can watch the video below for complete working of the project.

That is it we have a working of LED Strobe light setup. Hope you enjoyed the project and got it working, if not post your problems in the comment section and I will help you out.

Step 4: Datasheet



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