bryce10110 Posted December 16, 2010 Report Share Posted December 16, 2010 Hey, I'm working on a project and would like to know if this circuit would work. The two 50K potentiometers will be a single stereo potentiometer. Also the PWM's and the LOAD will be powered by different power supply. Quote Link to comment Share on other sites More sharing options...
Hero999 Posted December 16, 2010 Report Share Posted December 16, 2010 It looks fine apart from the dual 555 timer part which seems pointless and will probably not work because the two oscillators will not be in phase with one another.Why not just connect the four MOSFETs in parallel and use one 555 timer? Quote Link to comment Share on other sites More sharing options...
bryce10110 Posted December 16, 2010 Author Report Share Posted December 16, 2010 I was originally going to go with the single 555 but didn't know if a single 555 could handle the four MOSFETS or more (and I have a lot of parts lying around:) I'll go with the single 555. Thanks for the quick reply. Quote Link to comment Share on other sites More sharing options...
Hero999 Posted December 16, 2010 Report Share Posted December 16, 2010 MOSFETs don't require any current to siwtch,.The only problem is charging/discharging the high gate capacitance but you're only running it at 440Hz so it shouldn't be a huge problem. Quote Link to comment Share on other sites More sharing options...
bryce10110 Posted December 16, 2010 Author Report Share Posted December 16, 2010 I don't know a whole lot about electronics, still learning. So could you tell me how you determined it will be running at 440Hz. Quote Link to comment Share on other sites More sharing options...
Hero999 Posted December 17, 2010 Report Share Posted December 17, 2010 By using the formula for an astable 555 found on the datasheet besides, I made a mistake it's 283Hz. Quote Link to comment Share on other sites More sharing options...
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