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LED Color Fade Effect circuit diagram

2014-12-08 09:15  
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LED Color Fade Effect circuit

This is the circuit of LED color fade effect. Just like the name of the circuit, the light intensity of LEDs in this circuit will fade from high? intensity to low intensity and then off.

Here the final result preview:
LED Color Fade Effect circuit

LED Color Fade Effect circuit

30 uF condensator and the resistor marked with blue 100k control the speed of the fading. You can replace the 100 kilo ohm resistor with 100k linear potentiometer so you can adjust the speed any time.

You can make the circuit even simplier by leaving out other of the transistors and those leds that are connected to it. Good for power led pulsing etc.

LM324 is an OP-Ampamplifier. There 4 op amp, and we just use 2 op amp in abovecircuit diagram. You may use the other 2 op-amp to build another similar circuit. Transistor is BC547 and the led isultra brightred with 220 ohm resistor in series.

Source: http://metku.net/colorfade/index_eng.html

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