led circuit Tags - Circuit Schematic Diagram https://circuitscheme.com/tag/led-circuit Electroni Schematic and PCB Design Fri, 29 May 2020 03:04:58 +0000 en-US hourly 1 https://circuitscheme.com/wp-content/uploads/2016/10/cropped-ecd-32x32.jpg led circuit Tags - Circuit Schematic Diagram https://circuitscheme.com/tag/led-circuit 32 32 129959653 LED Color Fade Effect https://circuitscheme.com/led-color-fade-effect.html https://circuitscheme.com/led-color-fade-effect.html#comments Fri, 29 May 2020 03:04:58 +0000 http://circuitscheme.com/?p=304 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 […]

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]]> LED Color Fade Effect circuit diagramThis 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 preview

led color fade effect

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. The supply voltage is 5VDC, you may use battery or power supply adapter to operate this LED color fade effect circuit.

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-Amp amplifier. There 4 op amp, and we just use 2 op amp in above circuit diagram. You may use the other 2 op-amp to build another similar circuit. Transistor is BC547 and the led is ultra bright red with 220 ohm resistor in series.

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

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