How does a two-transistors LED flasher (flip-flop) circuit work?

In summary, a two-transistors LED flasher circuit, also known as a flip-flop circuit, works by using two transistors to alternately turn the LED on and off. The main components required for this circuit are two transistors, two resistors, one capacitor, and one LED. The capacitor plays a crucial role in determining the flashing speed, with a larger capacitor resulting in a slower flashing speed and a smaller capacitor resulting in a faster flashing speed. The circuit can be modified to change the flashing pattern by adjusting component values or adding additional components. Some advantages of this circuit include its simplicity, low cost, low power consumption, and potential use as a visual indicator.
  • #1
zerobigright
2
0
I don't know when does a capacitors and the transistors switch and turn the other off considering the voltage across them...well, on other words, don't know what makes the LEDs do the flipflop thing...HELP
 
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  • #2
This is a nice little project with a description on how the circuits works:
http://www.talkingelectronics.com/Projects/FlasherCircuits/Page83FlasherCircuitsP1.html
 
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  • #3
Thanks, this really helps.
 

1. How does a two-transistors LED flasher circuit work?

A two-transistors LED flasher, also known as a flip-flop circuit, works by using two transistors to alternately turn the LED on and off. The circuit is designed in such a way that when one transistor is on, the other is off, and vice versa.

2. What are the components required for a two-transistors LED flasher circuit?

The main components required for a two-transistors LED flasher circuit are two transistors (usually NPN type), two resistors, one capacitor, and one LED. Additional components such as a power source and a breadboard may also be needed for the circuit to function properly.

3. How does the capacitor in a two-transistors LED flasher circuit affect the flashing speed?

The capacitor in a two-transistors LED flasher circuit plays a crucial role in determining the flashing speed. A larger capacitor will result in a slower flashing speed, while a smaller capacitor will result in a faster flashing speed. This is because the capacitor controls the rate at which the transistors switch on and off.

4. Can the LED flasher circuit be modified to change the flashing pattern?

Yes, the LED flasher circuit can be modified to change the flashing pattern. This can be done by adjusting the values of the components, such as the resistors and the capacitor, or by adding additional components to the circuit. By changing these values, the frequency and duty cycle of the flashing pattern can be altered.

5. What are the advantages of using a two-transistors LED flasher circuit?

The two-transistors LED flasher circuit has several advantages. It is a simple and inexpensive circuit to build, making it ideal for beginners in electronics. It also consumes very little power, making it energy-efficient. Additionally, the flashing LED can be used as a visual indicator for various applications, such as in alarms, toys, and communication devices.

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