suggestion requested

Bill SC

Hi, I am thinking of building a miniature stage lighting setup using phototriacs for the drivers. What I am unsure how to go about is how to interface a bs2 in such a way as to get the maximum number of channels and control. I will, of course, be using the stamp to generate pwm, unless there is a better way. Any help would be greatly appreciated.

Mike Green

The Stamp is somewhat limited in that it can only execute one statement at a time. If you want multiple channels of PWM control, you will need some sort of external PWM controller. The easiest for this purpose is the PWMPAL which piggybacks under the BS2 and provides 4 independent channels of PWM.

Mike Green

Here's a link to another discussion: http://forums.parallax.com/showthread.php?p=633310. At the end of the thread, there's a nice PWM controller using a dual timer IC and a digitally controlled pot to set the PWM width. If you're willing to build the circuits, it could be a nice multi-channel lighting controller. You could use one timer for the clock source for all the lighting channels and only need one timer and one digital pot per channel (plus the common clock timer).

Bill SC

Thanks, I appreciate the help.