Ne555 Breathing Effect

This is a simple ne555 timer IC based multi vibrator breathing effect . The LED blinks like we breathe we can control the breathing time using potentiometer on board. It works on 5 volts DC to 9 volts DC.

The working of this is simple that the n e 555 produces a frequency or a signal which then activate a general purpose NPN transistor which bank switches on and of the LED . The breathing effect is produced due to the charging of a capacitor which turns on the emither collector path for a short amount of time until the capacitor gets drained

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1. Ne 555 timer IC
2. General purpose NPN transistor
3. 10 kilo ohms variable resistor
4. 10 kilo ohm resistor
5. 100 UF capacitor
6. 470 UF capacitor
7. 3 volt LED lights
8. Solid copper wire
9. Wooden base

Make a simple wooden base for soldering all these electronic components together so that we could produce a nice looking craft

NE 555 timer IC pinout is given above

• connect pin1 of ne 555 to negative terminal
• Connect pin8 of ne555 to positive terminal

• connect transistor emittor pin to ground
• Connect transistor base pin to pin3 of ic through a 10k ohms resistor
• Connect transistor collector pin to led negative

• Connect 10 kilo ohms resistor from pin1 of ic to base of transistor
• Connect 10 kilo ohms resistor from pin7 of ic to positive terminal
• Connect 10 kilo ohms variable resistor from pin6 of ic to pin7 of ic

• Connect 100uf capacitor positive pin to ic pin2
• Connect 100uf capacitor negative pin to ground

• Connect 470uf capacitor positive pin to base of transistor
• Connect 470uf capacitor negative pin to ground

All led positive and negative terminal is connected parallel

• Connect led positive to positive terminal
• Connect led ground to collector of transistor

Connect this to 5 volt dc and you can adjust the frequency using the 10 kilo ohms variable resistor on board