Square-wave modulator has variable frequency and pulse width


Rating: 0.00 / 5 
Square Wave Oscillator Circuits / Oscillator Circuits
The circuit in Figure 1 satisfies all these criteria. The circuit delivers a unipolar (adjustable from 0 to 12V) pulse with adjustable frequency and pulse width. The first half of a dual, retriggerable monostable multivibrator, IC1A, generates the frequency of the pulse train. The 100-k potentiometer, R1, along with R2 and C1, sets the adjustable frequency. R3, R4, and C2 set the adjustable pulse width in the second section of the multivibrator, IC1B. visit page.

Recommended videos

  • Oscillators- Pulse Width Modulation
    Duration: 4:44.
  • multivibrator circuit with variable frequency and duty cycle, 10 Hz-20 KHz (schematic)
    Duration: 6:07.
  • Pulse Wave Oscillator with PWM
    Duration: 1:43.


  • Hackaday
    Hackaday You could use another 555 astable (using the same as the clock but changing the values). But a common choice is to use an astable and 555 as an Atari punk console (we have a detailed article on the punk console which ...
     14 January 2016
  • EDN.com
    Experimenting with an HF , I needed to control the varactor diode voltage in precise increments over a 2V-10V range. A buffered potentiometer was the obvious choice, and connecting two pots in series to give coarse/fine control (or using a
     30 November 2015
  • Hackaday
    Hackaday The 555 operation is almost identical to the astable , however the trigger input is not connected to the timing capacitor. This means the does not “self trigger”, requiring an input (in this case from the astable
     17 September 2015
  • PR Newswire (press release)
    LONDON, Sept. 7, 2015 /PRNewswire/ -- This report analyzes the worldwide markets for Electronic Components in US$ Million by the following Product Segments: Resistors (Semi-Fixed Variable, Carbon Variable, Other Variable, Carbon Film Fixed, Meta
     7 September 2015
  • IEEE Spectrum
    IEEE Spectrum Immediately following the Second World War, electrical engineers grappled with a fundamental but open question: How should electronic digital computers be built? What kind of switch would serve best for logic ? And what should b
     19 March 2014
  • EE Times
    EE Times One could also use the comparator to create a one-shot or mutiviator for a special application. Regular multiviators or programmable are another possibility, while voltage controlled and alignable Xtal (crystal
     4 December 2013
  • EDN.com
    EDN.com works on low supply voltagesThis sawtooth-, drawing less than 3.2 μA and working at under 1V, is a useful building block that fits the bill for extremely low-power consumption and operation to low supply voltages. It could be
     15 May 2013
  • EE Herald
    Linear has introduced the LTC6993, a tiny “one-shot” pulse generator, the latest member of the TimerBlox family of timing devices The devices one-shot function, also known as a , is used for accurate event timing
     10 September 2010
  • Eetasia.com (subscription)
    Eetasia.com (subscription) With no flame present, the flame detector is essentially an open so that any charge on C3 will stay until the next clock cycle of the astable 33ms later. The TPS65552A senses the output voltage by looking at the f
     17 January 2008


Leave Comment

characters left: