LED ramping circuit


Posted on Feb 7, 2014

In this circuit the intensity of LED will vary in a ramping fashion. The circuit consists of three ICs: Two 555 timer ICs and one LM393 op-amp. IC1 and IC2 are wired as oscillators to produce 10 KHz and 1 Hz frequencies respectively. These two frequencies are given to the inputs of the op-amp LM393. LM393 is wired as a comparator and its output will


LED ramping circuit
Click here to download the full size of the above Circuit.

be a PWM signal. This PWM signals controls the FET Q1 to drive the LED. The LED will rise from OFF state to full brightness slowly and then slowly fades to OFF state and this operation repeats. The resistor R4 controls current through the LED.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    R/C On/Off Motor Controller with Brake
    Simple 3-6V LED Flasher
    Metronome Generator Circuit using NE555
    OddWatt Audio 5751 SRPP / KT88 Push-Pull Monoblock Tube Amplifier Kits
    amplifier Amp measures board twist (unfortunately!)
    Telephone operated remote control using PIC16F84A microcontroller
    Centrifugal fish autofeeder
    Solar iPod Charger



    Top