Asymmetric Timers


Posted on Feb 6, 2014

A simple astable timer made with the 555, the mark (on) and space (off) values may be set independently. The timing chain consists of resistors Ra, Rb and capacitor Ct. The capacitor, Ct charges via Ra which is in series with the 1N4148 diode. The discharge path is via Rb into into pin 7 of the IC. Both halves of the timing period can now be set i


Asymmetric Timers
Click here to download the full size of the above Circuit.

ndependently.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    LED Crystal Tester
    RF power and VSWR meter
    Three-dial combination lock
    100M-baud-fiber-optic-receiver
    ICL7107 Digital LED Voltmeter
    Arduino Calibration
    blinking-led-circuits.html
    220V Touch Switch
    Fun with Filters!
    mobile incoming call indicator
    remote control circuit
    5V power supply with overvoltage protection
    Dual Relay Driver Board Circuit Schematic
    Lighting designs with flicker-free LED dimming
    Recording level display circuit



    Top