PWM Signal from SoundCard

Create a pwm signal using a standard soundcard.

Description

PWM Signals are used in a wide area of applications. Examples are a servos used for positioning in electromechanical control design (mechatronic). Here is a simple function that allows to create a pwm signal with a standard soundcard. Parameters are: pulsewidth and time between pulse-starts.

One restriction is that the approach allows duty cycles up to 50% only.

All you need is to add at the output of the soundcard is a resistor as load (1k) and a diode (1N4001). The image enclosed shows the output I got for:

>> PWMSound(1.5e-3,10e-3);

• Required Products: Data Acquisition Toolbox
• MATLAB release: MATLAB 7.1.0 (R14SP3)
• Other requirements: standard soundcard, should work on older releases

[Oscar Campo]

You can obtain different duty cicles by adding this line after the "dat" definition:

dat=dat(1:ncycle);

[essalhi adil]

pwm simulink

[oldokh tsendayush]

i analsysis matlab sinmklif

[shanthanu chakravarthy]