2 Transistor Led Flasher Circuit

The following is led flasher circuit which use 2 transistors for led switching.

2 transistor led flasher circuit. 2 led flasher circuit simple blinking flasher led circuit. The resistor r and capacitor c determines the timing of the flasher and the period is proportional to r c. By metsfan1938 in circuits electronics. Two transistor led flasher circuit.

Simple 2 transistor led flasher circuit. The circuit can operate from a voltage of about 5v up to 12v change the value r4 to about 1k if using a voltage higher than around 10v. R1 10m ohm r2 1k 100k ohm r3 470 ohm c1 0 47uf 10uf 25v d1 1n914 q1 2n3904 q2 2n3906 led high brightness red led this circuit. By lewis loflin tweet.

More by the author. The following is led flasher circuit which use 2 transistors for led switching. Led flasher circuit diagram. This simple led flasher blinker circuit made by using two npn bc547 transistor and some resistors and capacitors.

This circuit is actually a astable multi vibrator it acts like a two switch which gives the complement outputs the basics is that when one transistor is in saturation region the other transistor will be in the cutoff region so the led in cutoff region will glow and the led in saturation region will not glow on the next cycle the cutoff transistor will goes to saturation region and the other. Two transistor led flasher circuit. The circuit works similar to flip flop operation. The circuit works similar to flip flop operation.

While today most people use a ne555 timer ic this version is simple to build. Here is a blast from past as they say with a transistor astable multivibrator. The circuit will operate using almost any small npn transistors e g. Ksp2222 pn2222 2n2222 bc107 bc108 bc109 etc.

The speed of blinking can be changed by changing the value of capacitor c1 and c2. More about metsfan1938 how to make a circuit to make two leds flash back and forth. R1 10m ohm r2 1k 100k ohm r3 470 ohm c1 0 47uf 10uf 25v d1 1n914 q1 2n3904 q2 2n3906 led high brightness red read more.