Hey guys. Thinking of scrapping together a 48 “channel” control surface using some arduino megas and OSC. (No motorized Faders, all rotary encode. those mfs expensive lol, Sorry guys).
Aside from the goal, I’m using OSC to gather strip dB messages with an Arduino mega and turning them into PWM duty cycle value that is then low passed (47k ohm, 0.8uF) and converted into a DC voltage to drive the LM3914 on pin 5.
How sensitive are the LM3914s to ripple noise? Would ripple cause inaccurately displayed values?
I would not want any unnecessary flickering between LEDs if said issue would arise, but too high of a capacitance(I think) on the lowpass would obscure and not display the dB in a quick enough fashion as it reacts to the OSC messages being received.
Order of operations as follows:
OSC(strip channel dB) - > Arduino - > PWM signal - > Low pass filter(Conv. duty cycle to voltage) - > LM3914
Thanks guys. Been trying to plan this project for over a year but life’s been in the way.