Now showing circuits 21-37 of 37. Sort by

555 PWM for fan speed control

555 PWM for fan speed control PUBLIC

I wanted to control a computer’s fan speed by the air temperature at the “hot spot” (the power supply air outlet). The project consists of three parts for easy simulation and was later verified on a...

by Sancho_P | updated November 07, 2012

555   behavioral-sources   fan-speed-control   newbie   ntc   pwm  

Dual 555 PWM generator

Dual 555 PWM generator PUBLIC

A simple 2x555 PWM generator intended for use as an ADC in which a computer times the pulse length. U1 produces a chain of trigger pulses for U2, which produces pulses whose length is dictated by the...

by thekeywordgeek | updated October 31, 2012

555   adc   pwm  

10% to 90% switched PWM source 01

10% to 90% switched PWM source 01 PUBLIC

A way to generate a pulse train so that it's duty cycle switches from D to 1-D. Implemented by scaling, then inverting and level shifting a CLK source set to a duty cycle D, using the USTEP function....

by signality | updated October 01, 2012

behavioural-source   pwm   ustep  

simple class d amp 01

simple class d amp 01 PUBLIC

A very quick and dirty Class D amp demo

by signality | updated August 07, 2012

amplifier   class-d   pwm  

PWM 01


V(duty) sets the duty cycle of the PWM output. V(saw) is a 0 to 1V swing sawtooth and sets the PWM frequency. V(amp) sets the amplitude of the PWM output. V(offset) sets the DC offset of the PWM...

by signality | updated July 28, 2012

pulse-width-modulator   pwm   variable-duty-cycle  

PWM Motor Control

PWM Motor Control PUBLIC

by Phozz | updated July 19, 2012

555   control   fan   motor   pwm   speed  

3 Phase Oscilator Motor Driver

3 Phase Oscilator Motor Driver PUBLIC

by jhonalvez | updated May 18, 2012

3-phase   ac   driver   motor   oscilator   pwm  

Copy of danielfiction`s 555 motor controller (high motor current)

Copy of danielfiction`s 555 motor controller (high motor current) PUBLIC

by jhonalvez | updated May 18, 2012

motor   pwm  


H-BridgeMotorController PUBLIC

A H-bridge Motor Controller using pwm input to control forward reverse.

by strigo8183 | updated May 04, 2012

h-bridge   motor-controller   pwm  

BJT PWM -- multi-stage rise/fall times

BJT PWM -- multi-stage rise/fall times PUBLIC

Power BJTs can be used to switch lots of current, but they require lots of base current as well.

by mrobbins | updated March 28, 2012

bjt   power   pwm  



Simple potentiometer controlled PWM with the classic 555 chip

by pkilian | updated March 07, 2012

555   pwm  

Sturdy flyback driver

Sturdy flyback driver PUBLIC

A flexible and durable flyback transformer driver.

by justincardoza | updated March 05, 2012

flyback   high-voltage   hv   pwm  

PWM Motor Driver

PWM Motor Driver PUBLIC

555 pwm circuit for driving a bunch of PC case fans. Pulse width should be well above the 20 kHz audible range.

by robgig1088 | updated March 04, 2012

555   mosfet   pwm  

555 motor controller

555 motor controller PUBLIC

555 oscillator easy motor control. not so stable. very effective.

by danielfiction | updated March 02, 2012

555   555-motor-controller   astable   bjt   cheap   dfiction   econo   flyback-diode   motor   pwm  

Copy of danielfiction's 555 motor controller ($0.50!)

Copy of danielfiction's 555 motor controller ($0.50!) PUBLIC

Build a PWM motor controller for $0.50! Based on danielfiction's circuit (link inside).

by mrobbins | updated March 01, 2012

555   bjt   motor   pwm  

PWM Output Into a Low Pass Filter

PWM Output Into a Low Pass Filter PUBLIC

A simple example of a low pass filter on a digital PWM output.

by hevans | updated February 24, 2012

filter   low-pass   pwm  

555 as Pulse Width Modulation (PWM) generator

555 as Pulse Width Modulation (PWM) generator PUBLIC

555 timer as a PWM generator based on an analog input source.

by mrobbins | updated January 24, 2012

555   pwm  

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