How to add pulse to DC signal?

[Plue]

hi guys,
lets say i have a DC voltage signal of 3V and i want to add pulses to the signal to make it look like a square waveform.

Any ideas on how to go about doing it? thank you

 

[Rescyou]

Let there be PWM

PWM will solve you problems:

http://www.oreillynet.com/pub/a/network/synd/2003/07/02/pwm.html

http://www.eleinmec.com/article.asp?28

http://www.cpemma.co.uk/pwm.html


Resc.