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

    Fuel-cell battery tester
    Dual-tracking-regulator
    Receiver Frequency-Converter Stage
    Battery Powered Burglar Alarm
    arduino switch controller
    DEMODULATOR circuit
    Intelligent ultrasonic ranging ASIC SB5227 peripheral circuit design
    XTR105 reverse voltage and over-voltage surge protection circuit
    Normally closed contact burglar alarm circuit diagram



    Top