digital ac scaling being in the visualization stage of a circuit design right now i was wondering what the best way to scale an ac voltage using an bit digital word is i am thinking of using the common method of sending the word through an adc and then comparing it with the ac voltage converted to a sawtooth wave to get a duty cycle however i am leary of this method because it a requires a lot of parts and more importantly b creates a lot of interference from the switching on the entire ac line i realize that correct filtering could cancel out most of this interference but that would require more parts and boost the price further someone mentioned to me that they had seen an ic which input bits of data and directly scaled the ac voltage coming in all on chip unfortunately he couldn t remember the chip number or the manufacturer if anyone else has heard of this chip please e mail me i am building this project as a dimmer box for a light controller circuit and it is important that the cost of each box remains very low because one dimmer is required for each light that the user wishes to control well each channel at least therefor if each box costs i doubt that an end user will want to dish out x for sixteen channels this is something i have noticed about today s dimmer boxes they are so expensive anyway any help which someone could offer on either a method of easily doing this or info about the chip which will do it for me always the preferred method will be greatly appreciated michael carr m carr onu edu
